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Pacher K, Breuker M, Hansen MJ, Kurvers RHJM, Häge J, Dhellemmes F, Domenici P, Steffensen JF, Krause S, Hildebrandt T, Fritsch G, Bach P, Sabarros PS, Zaslansky P, Mahlow K, Müller J, Armas RG, Ortiz HV, Galván-Magaña F, Krause J. The rostral micro-tooth morphology of blue marlin, Makaira nigricans. J Fish Biol 2024; 104:713-722. [PMID: 37987173 DOI: 10.1111/jfb.15608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 10/10/2023] [Accepted: 11/01/2023] [Indexed: 11/22/2023]
Abstract
Billfish rostra potentially have several functions; however, their role in feeding is unequivocal in some species. Recent work linked morphological variation in rostral micro-teeth to differences in feeding behavior in two billfish species, the striped marlin (Kajikia audax) and the sailfish (Istiophorus platypterus). Here, we present the rostral micro-tooth morphology for a third billfish species, the blue marlin (Makaira nigricans), for which the use of the rostrum in feeding behavior is still undocumented from systematic observations in the wild. We measured the micro-teeth on rostrum tips of blue marlin, striped marlin, and sailfish using a micro-computed tomography approach and compared the tooth morphology among the three species. This was done after an analysis of video-recorded hunting behavior of striped marlin and sailfish revealed that both species strike prey predominantly with the first third of the rostrum, which provided the justification to focus our analysis on the rostrum tips. In blue marlin, intact micro-teeth were longer compared to striped marlin but not to sailfish. Blue marlin had a higher fraction of broken teeth than both striped marlin and sailfish, and broken teeth were distributed more evenly on the rostrum. Micro-tooth regrowth was equally low in both marlin species but higher in sailfish. Based on the differences and similarities in the micro-tooth morphology between the billfish species, we discuss potential feeding-related rostrum use in blue marlin. We put forward the hypothesis that blue marlin might use their rostra in high-speed dashes as observed in striped marlin, rather than in the high-precision rostral strikes described for sailfish, possibly focusing on larger prey organisms.
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Affiliation(s)
- Korbinian Pacher
- Faculty of Life Sciences, Humboldt-Universität zu Berlin, Berlin, Germany
- Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Michael Breuker
- Department of Electrical Engineering and Computer Science, Lübeck University of Applied Sciences, Lübeck, Germany
| | - Matthew J Hansen
- Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Ralf H J M Kurvers
- Center for Adaptive Rationality, Max Planck Institute for Human Development, Berlin, Germany
- Excellence Cluster Science of Intelligence, Technische Universität Berlin, Berlin, Germany
| | - Jan Häge
- Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Felicie Dhellemmes
- Faculty of Life Sciences, Humboldt-Universität zu Berlin, Berlin, Germany
- Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Paolo Domenici
- CNR-IBF Istituto di Biofisica, Pisa, Italy
- CNR-IAS Istituto per lo studio degli impatti Antropici e Sostenibilità in ambiente marino, Oristano, Italy
| | - John F Steffensen
- Marine Biological Section, University of Copenhagen, Helsingør, Denmark
| | - Stefan Krause
- Department of Electrical Engineering and Computer Science, Lübeck University of Applied Sciences, Lübeck, Germany
| | | | - Guido Fritsch
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Pascal Bach
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
- Institut de Recherche pour le Développement, Sète, France
| | - Philippe S Sabarros
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
- Institut de Recherche pour le Développement, Sète, France
| | - Paul Zaslansky
- Department for Operative and Preventive Dentistry, Centrum für Zahn-, Mund- und Kieferheilkunde, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Kristin Mahlow
- Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Berlin, Germany
| | - Johannes Müller
- Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Berlin, Germany
| | - Rogelio González Armas
- Departamento de Pesquerías y Biología Marina, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Instituto Politécnico Nacional, La Paz, Mexico
| | - Hector Villalobos Ortiz
- Departamento de Pesquerías y Biología Marina, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Instituto Politécnico Nacional, La Paz, Mexico
| | - Felipe Galván-Magaña
- Departamento de Pesquerías y Biología Marina, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Instituto Politécnico Nacional, La Paz, Mexico
| | - Jens Krause
- Faculty of Life Sciences, Humboldt-Universität zu Berlin, Berlin, Germany
- Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
- Excellence Cluster Science of Intelligence, Technische Universität Berlin, Berlin, Germany
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Ángel-Moreno Briones Á, Ramírez-Álvarez N, Hernández-Guzmán FA, Galván-Magaña F, Marmolejo-Rodríguez AJ, Sánchez-González A, Baró-Camarasa I, González-Armas R. Levels and species-specific organochlorine accumulation in three shark species from the western Gulf of California with different life history traits. Sci Total Environ 2024; 908:168468. [PMID: 37951268 DOI: 10.1016/j.scitotenv.2023.168468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/28/2023] [Accepted: 11/08/2023] [Indexed: 11/13/2023]
Abstract
Organochlorine compounds (OCs), such as organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs), remain ubiquitous in marine ecosystems despite their prohibition or restriction, posing a risk to marine wildlife and humans. Their accumulation in liver tissue and potential toxicity in three exploited shark species (the scalloped hammerhead, Sphyrna lewini; the Pacific sharpnose shark, Rhizoprionodon longurio; and the Pacific angel shark, Squatina californica) with different physiological and ecological features from the western Gulf of California (GC) were investigated. Forty of the 47 OCs analyzed were identified, evidencing a greater agricultural than industrial influence considering the high DDTs/PCBs ratios. The DDT group was the main contributor to ∑OCs in the three species, while hexa- and hepta-CBs dominated the PCB profiles. S. lewini (juveniles) and R. longurio (juveniles and adults) had similar and significantly (p < 0.05) higher ∑OCP concentrations than S. californica (juveniles and adults), which is attributed to their migration to other polluted regions of the gulf. The three species' ∑PCB levels (lipid weight) were comparable and considered low in comparison to those documented in prior studies conducted worldwide. No intraspecific differences were observed when comparing by sex, but OC concentrations were higher in larger individuals. S. lewini and R. longurio showed different OC bioaccumulation trends against size, while no relationship between size and ∑OC concentrations was observed in S. californica. All shark species' toxic equivalents (TEQs) were calculated from dioxin-like PCB concentrations and were far below the established TEQ fish thresholds. However, future research is needed regarding the possible PCB and OCP effects in elasmobranchs. This study provides the basis for monitoring organic contaminants in predatory sharks from the western GC. It also highlights the importance of further research on unintentionally produced organochlorine environmental levels and sources.
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Affiliation(s)
- Ángela Ángel-Moreno Briones
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n. La Paz, Baja California Sur C. P. 23096, Mexico.
| | - Nancy Ramírez-Álvarez
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana no 3917, Ensenada, Baja California C. P. 22860, Mexico
| | - Félix Augusto Hernández-Guzmán
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana no 3917, Ensenada, Baja California C. P. 22860, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n. La Paz, Baja California Sur C. P. 23096, Mexico
| | - Ana Judith Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n. La Paz, Baja California Sur C. P. 23096, Mexico
| | - Alberto Sánchez-González
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n. La Paz, Baja California Sur C. P. 23096, Mexico
| | - Isis Baró-Camarasa
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n. La Paz, Baja California Sur C. P. 23096, Mexico
| | - Rogelio González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n. La Paz, Baja California Sur C. P. 23096, Mexico
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Villagómez-Vélez SI, Noreña-Barroso E, Galván-Magaña F, González-Armas R, Rodríguez-Fuentes G, Marmolejo-Rodríguez AJ. Persistent Organic Pollutants in Whale Shark (Rhincodon typus) Skin Biopsies from Bahía de Los Ángeles, Mexico. Bull Environ Contam Toxicol 2023; 112:18. [PMID: 38141110 DOI: 10.1007/s00128-023-03841-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023]
Abstract
The whale shark (Rhincodon typus) is a filter-feeding organism that can be considered a sentinel species, and Bahía de los Ángeles (BLA) in the Gulf of California is an important sighting site for these elasmobranchs. This filter-feeding organism can be considered a pollutant sampler from the marine environment. Persistent organic pollutants are toxic compounds with high mobility and environmental persistence, bioaccumulation and trophic transfer. Among these are polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs). The present work aimed to determine concentrations of PAHs and OCPs in whale shark skin biopsies, collected in 2021 at BLA. Mean detected levels of PAHs and OCPs were 279.4 ng/g dw (dry weight) and 1478.1 ng/g dw, respectively. Analysis of similarities between the ordered sizes (4.2-7.6 m) and the concentrations of PAHs and OCPs indicated no significant differences. Individual PAHs detected indicate pyrogenic and petrogenic sources; the presence of pesticides at levels higher than those of hydrocarbons may be related to agricultural activity in the areas surrounding the Baja California peninsula. This study is the first report of PAH levels in R. typus for the Gulf of California and Mexico.
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Affiliation(s)
- Stephanie Itzel Villagómez-Vélez
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional S/N, 23096, La Paz, Baja California Sur, México
| | - Elsa Noreña-Barroso
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Puerto de Abrigo S/N, 97356, Sisal, Yucatán, México.
- Laboratorio Nacional de Resiliencia Costera (LANRESC), Puerto de Abrigo S/N, 97356, Sisal, Yucatán, México.
| | - Felipe Galván-Magaña
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional S/N, 23096, La Paz, Baja California Sur, México
| | - Rogelio González-Armas
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional S/N, 23096, La Paz, Baja California Sur, México
| | - Gabriela Rodríguez-Fuentes
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Puerto de Abrigo S/N, 97356, Sisal, Yucatán, México
| | - Ana Judith Marmolejo-Rodríguez
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional S/N, 23096, La Paz, Baja California Sur, México
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Yáñez-Arenas A, Nakamura M, Trites AW, Reyes-Bonilla H, Hernández-Camacho CJ, Galván-Magaña F, Borcherding J, del Monte-Luna P. An integrated system to assess marine extinctions. PLoS One 2023; 18:e0293478. [PMID: 37883427 PMCID: PMC10602268 DOI: 10.1371/journal.pone.0293478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 10/12/2023] [Indexed: 10/28/2023] Open
Abstract
More than 20 global marine extinctions and over 700 local extinctions have reportedly occurred during the past 500 years. However, available methods to determine how many of these species can be confidently declared true disappearances tend to be data-demanding, time-consuming, and not applicable to all taxonomic groups or scales of marine extinctions (global [G] and local [L]). We developed an integrated system to assess marine extinctions (ISAME) that can be applied to any taxonomic group at any geographic scale. We applied the ISAME method to 10 case studies to illustrate the possible ways in which the extinction status of marine species can be categorized as unverified, possibly extinct, or extinct. Of the 10 case studies we assessed, the ISAME method concludes that 6 should be categorized as unverified extinctions due to problems with species' identity and lack of reliable evidence supporting their disappearance (periwinkle-Littoraria flammea [G], houting-Coregonus oxyrinchus [G], long-spined urchin-Diadema antillarum [L], smalltooth sawfish-Pristis pectinata [L], and largetooth sawfish-P. pristis [L]). In contrast, ISAME classified the Guadalupe storm-petrel (Oceanodroma macrodactyla [G]) and the lost shark (Carcharhinus obsolerus [G]) as possibly extinct because the available evidence indicates that their extinction is plausible-while the largetooth sawfish [L] and Steller's sea cow (Hydrodamalis gigas [G]) were confirmed to be extinct. Determining whether a marine population or species is actually extinct or still extant is needed to guide conservation efforts and prevent further biodiversity losses.
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Affiliation(s)
| | - Miguel Nakamura
- Centro de Investigación en Matemáticas, Guanajuato, Gto., México
| | - Andrew W. Trites
- Institute For the Oceans and Fisheries, University of British Columbia, Vancouver BC, Canada
| | - Héctor Reyes-Bonilla
- Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, La Paz, BCS, México
| | | | | | - Jost Borcherding
- Institute For Zoology, General Ecology & Limnology, University of Cologne, Cologne, Germany
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5
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Briones-Hernández SA, Jakes-Cota U, Elorriaga-Verplancken FR, Galván-Magaña F, Logan JM, O'Sullivan J, Carvajal-Rodríguez JM, Elias E, Alfaro-Shigueto J, Ortega-García S. Movement and population dispersal of dolphinfish (Coryphaena hippurus) across the Eastern Tropical Pacific inferred from carbon and nitrogen stable isotope analyses. J Fish Biol 2023; 103:544-556. [PMID: 37212715 DOI: 10.1111/jfb.15456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 05/17/2023] [Indexed: 05/23/2023]
Abstract
The dolphinfish (Coryphaena hippurus) is a globally distributed marine predator that supports one of the most important coastal fisheries along the Eastern Tropical Pacific (ETP), but its spatial movements in this area are poorly understood. Stable isotope values (δ13 C and δ15 N) of white muscle from dolphinfish (n = 220) captured at different locations across the ETP (i.e., Mexico, Costa Rica, Ecuador, Peru and oceanic areas) were normalized to copepod baseline stable isotope values to estimate dolphinfish trophic position, movements and population dispersal. Movement or residence patterns were inferred from the difference in δ15 N values (Δ15 Ndolphinfish-copepod ‰) between copepods and dolphinfish muscle. Baseline corrected isotope values (δ13 Cdolphinfish-copepod and δ15 Ndolphinfish-copepod ) of dolphinfish muscle were used to estimate isotopic niche metrics and infer population dispersal across isoscapes. Values of δ13 C and δ15 N differed between juvenile and adult dolphinfish and across the ETP. Trophic position estimates ranged from 3.1 to 6.0 with a mean of 4.6. Adults and juveniles had similar trophic position estimates, whereas isotopic niche areas (SEA ‰2 ) of adults were greater relative to juveniles in every location. Adult dolphinfish showed "moderate movement by some individuals" in all locations based on Δ15 Ndolphinfish-copepod values, except for Costa Rica where adults were classified with "high degree of movement by some individuals" whereas juveniles showed "limited movement" in all areas except Mexico. Population dispersal based on Δ15 Ndolphinfish-copepod values showed "moderate" and "high" dispersal for adults and "no dispersal" for most juveniles, except for Mexico. This study provides insight into potential dolphinfish spatial mobility across an area of interest for multiple nations, which can help to improve stock assessments and management of the species.
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Affiliation(s)
| | - Ulianov Jakes-Cota
- Departamento de Pesquerías y Biología Marina, Instituto Politécnico Nacional - CICIMAR, La Paz, Mexico
| | | | - Felipe Galván-Magaña
- Departamento de Pesquerías y Biología Marina, Instituto Politécnico Nacional - CICIMAR, La Paz, Mexico
| | - John M Logan
- Massachusetts Division of Marine Fisheries, New Bedford, Massachusetts, USA
| | | | | | - Esteban Elias
- Instituto Público de Investigación de Acuicultura y Pesca, Guayaquil, Ecuador
| | | | - Sofía Ortega-García
- Departamento de Pesquerías y Biología Marina, Instituto Politécnico Nacional - CICIMAR, La Paz, Mexico
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Rosas BRC, Sakthi JS, Barjau-González E, Rodríguez-González F, Galván-Magaña F, Ramírez SF, Gómez-Chávez F, Sarkar SK, Jonathan MP. First account of microplastics in pelagic sporting dolphinfish from the eastern Mexican coast of Baja California Sur. Environ Toxicol Pharmacol 2023; 100:104153. [PMID: 37220852 DOI: 10.1016/j.etap.2023.104153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/10/2023] [Accepted: 05/17/2023] [Indexed: 05/25/2023]
Abstract
This study is a baseline data on the presence of MPs from the gastro-intestinal tracts (GITs) in Coryphaena hippurus Linnaeus, from eastern Baja California Sur, México. 878 MPs items (in %) of fibers (29%), fragments (68%) and films (1.3%) were detected from 51 GITs of Coryphaena hippurus. Transparent, white, blue and black were the prevalent colours. Morphological features observed through SEM analysis, the presence of heavily weathered MPs is due to the mechanical, microbiological and chemical weathering process. PP (29%), Nylon (29%), PS (17%), PE (11%), PET (6%) and HDPE (8%) presence indicates their source from regional anthropogenic stress. Trophic level transition is enforced by polymer derivative, permitting the sinking behavior of MPs and increased ingestion probability. Fishes were classified as slim despite their higher feeding capabilities and ingested MPs indicates a relationship with environmental contaminants. Current study emphasizes the health risk linked to biological aspects of MPs ingestion.
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Affiliation(s)
- Bruma Rachel Castillo Rosas
- Universidad Autónoma de Baja California Sur (UABCS), Departamento Académico de Ciencias Marinas y Costeras, Carretera al Sur K.M 5.5, Apartado Postal 19-B, C.P.23080, La Paz, Baja California Sur, Mexico
| | - J S Sakthi
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340, Ciudad de México, Mexico
| | - Emelio Barjau-González
- Universidad Autónoma de Baja California Sur (UABCS), Departamento Académico de Ciencias Marinas y Costeras, Carretera al Sur K.M 5.5, Apartado Postal 19-B, C.P.23080, La Paz, Baja California Sur, Mexico
| | - Francisco Rodríguez-González
- Instituto Politécnico Nacional (IPN), Centro de Desarrollo de Productos Bióticos (CEPROBI), Carretera Yautepec-Jojutla Km. 6, Calle CEPROBI No. 8, Col. San Isidro, Yautepec, Morelos, C.P. 62731, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Sergio Flores Ramírez
- Universidad Autónoma de Baja California Sur (UABCS), Departamento Académico de Ciencias Marinas y Costeras, Carretera al Sur K.M 5.5, Apartado Postal 19-B, C.P.23080, La Paz, Baja California Sur, Mexico
| | - Fernando Gómez-Chávez
- Instituto Politécnico Nacional (IPN), Escuela Nacional de Medicina y Homeopatía (ENMyH), Laboratorio de Enfermedades Osteoarticulares e Inmunológicas, Sección de Estudios de Posgrado e Investigación, Av. Guillermo Massieu Helguera 239, La Escalera, Gustavo A. Madero, 07320 Ciudad de México, Mexico
| | - S K Sarkar
- Department of Marine Science, University of Calcutta, 35, Ballygunge Circular Road, Calcutta 700019, West Bengal, India
| | - M P Jonathan
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340, Ciudad de México, Mexico.
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7
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Baró-Camarasa I, Galván-Magaña F, Cobelo-García A, Marmolejo-Rodríguez AJ. Major, minor and trace element concentrations in the muscle and liver of a pregnant female Pacific sharpnose shark (Rhizoprionodon longurio) and its embryos. Mar Pollut Bull 2023; 188:114619. [PMID: 36689873 DOI: 10.1016/j.marpolbul.2023.114619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
The Pacific sharpnose shark Rhizoprionodon longurio is an abundant shark consumed by human population in Mexico. This study aimed to determine and compare the concentrations of thirteen essential elements (K, S, P, Na, Ca, Mg, Fe, Zn, Se, Cu, Mn, Cr and Co) and eleven non-essential elements (As, Sr, Cd, V, Li, U, Tl, Ag, Sn, Sb and Pb) in the muscle and liver of a pregnant female, fished near the copper mine of Santa Rosalía, and their respective embryos. Major, minor and trace (essential and non-essential) elements were transferred during gestation to embryos. All major elements analyzed had significantly higher concentrations in embryos liver than the pregnant female, except for magnesium. Higher concentrations in embryo tissues than the pregnant female tissues were found for the non-essential trace elements of strontium, lithium, thallium and silver, which indicate an easy maternal transfer of these non-essential elements.
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Affiliation(s)
- Isis Baró-Camarasa
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
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Vega-Barba C, Páez-Osuna F, Galván-Magaña F, Baró-Camarasa I, Aguilar-Palomino B, Galván-Piña VH, Marmolejo-Rodríguez AJ. Trace elements in the silky shark Carcharhinus falciformis in the Central Pacific Mexican Shelf. Mar Pollut Bull 2022; 185:114263. [PMID: 36327932 DOI: 10.1016/j.marpolbul.2022.114263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Mercury (Hg), cadmium (Cd) and copper (Cu) concentrations were determined in muscle, liver and fin of the silky shark (Carcharhinus falciformis) caught in the Central Pacific Mexican Shelf. Liver tissue presented the highest concentrations of Cd (2.83 μg g-1 wet weight (ww)) and Cu (2.34 μg g-1 ww). For muscle and fin, Cu presented the highest concentrations (0.97 and 1.80 μg g-1 ww, respectively). Liver concentrations were influenced by the maturation stages for the three elements. Immature organisms exhibited lower trace element concentrations than adults. No significant differences were found between sexes, except for Cu concentrations in muscle, where adult females present higher levels than adult males. One muscle sample (2.3 %) exceeded the Mexican Legislation for Hg (1.0 μg g-1 ww) and five muscles samples (11.6 %) exceeded the Mexican limit for Cd (0.5 μg g-1 ww). Meat consumption of this species can be a risk to human health if it is ingested regularly.
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Affiliation(s)
- Christian Vega-Barba
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, Col. Playa Palo de Sta. Rita, La Paz, Baja California Sur C.P. 23096, Mexico
| | - Federico Páez-Osuna
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, Mazatlán 82000, Sinaloa, Mexico; Miembro de El Colegio de Sinaloa, Antonio Rosales 435 pte., Centro Histórico, C.P. 80000 Culiacán, Sinaloa, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, Col. Playa Palo de Sta. Rita, La Paz, Baja California Sur C.P. 23096, Mexico
| | - Isis Baró-Camarasa
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, Col. Playa Palo de Sta. Rita, La Paz, Baja California Sur C.P. 23096, Mexico
| | - Bernabé Aguilar-Palomino
- Departamento de Estudios para el Desarrollo Sustentable de Zonas Costeras, Universidad de Guadalajara, Gómez Farías 82, San Patricio-Melaque, Jalisco C.P. 48980, Mexico
| | - Víctor Hugo Galván-Piña
- Departamento de Estudios para el Desarrollo Sustentable de Zonas Costeras, Universidad de Guadalajara, Gómez Farías 82, San Patricio-Melaque, Jalisco C.P. 48980, Mexico
| | - Ana J Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, Col. Playa Palo de Sta. Rita, La Paz, Baja California Sur C.P. 23096, Mexico.
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9
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Rodriguez-Arana Favela JP, Hernández S, González-Armas R, Galván-Magaña F, Tripp-Valdez A, Hoyos-Padilla M, Ketchum JT. A priority nursery area for the conservation of the scalloped hammerhead shark Sphyrna lewini in Mexico. J Fish Biol 2022; 101:1623-1627. [PMID: 36208114 DOI: 10.1111/jfb.15227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
This study describes the genetic diversity and level of genetic differentiation of the scalloped hammerhead shark Sphyrna lewini from eight putative nursery areas in the Mexican Pacific Ocean, using the mtDNA control region. Genetic analyses revealed a particular spatial divergence between La Reforma and all the remaining sites, with five exclusive haplotypes and the highest genetic diversity. This pattern may be interpreted as the signature of regional female philopatry, relatively to a particular female-mediated gene flow for La Reforma, which shows a strong subdivision in the Gulf of California.
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Affiliation(s)
- Juan P Rodriguez-Arana Favela
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
- Pelagios Kakunja A.C., La Paz, Mexico
| | - Sebastián Hernández
- Biomolecular Laboratory, Center for International Programs and Sustainability Studies, Universidad Veritas, San José, Costa Rica
- Sala de Colecciones, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile
| | - Rogelio González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Arturo Tripp-Valdez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | | | - James T Ketchum
- Pelagios Kakunja A.C., La Paz, Mexico
- MigraMar, Bodega Bay, California, USA
- Centro de Investigaciones Biológicas Noroeste (CIBNOR), La Paz, Mexico
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10
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Ochoa-Zavala M, Diaz-Jaimes P, Ortega-García S, Galván-Magaña F. Genetic divergence at species boundaries of the dolphinfish ( Coryphaena hippurus) in the Tropical Eastern Pacific. PeerJ 2022; 10:e14389. [PMID: 36415864 PMCID: PMC9676019 DOI: 10.7717/peerj.14389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 10/23/2022] [Indexed: 11/18/2022] Open
Abstract
Background Marine species constitute commercially important resources, and knowledge about mechanisms that shape phylogeographic patterns and genetic structure provides valuable information for conservation. The dolphinfish, Coryphaena hippurus, is one of the most important species caught in the Tropical Eastern Pacific (TEP). However, the lack of consensus about the existence of genetically differentiated populations in the area has hindered the adoption of management strategies to ensure its viability. Methods We assessed genetic variation and phylogeographic structure using two mitochondrial genes and 14 nuclear DNA microsatellite loci. Population genetic tools were used to characterize the spatial distribution of genetic variation of C. hippurus in the TEP, evaluate the extent of connectivity between dolphinfish populations, infer potential barriers to gene flow, and test for signals of contemporary and historical demographic expansions. Results Mitochondrial DNA sequences showed genetic homogeneity across locations in the TEP, as well as a strong signal of population expansion dated to the late Pleistocene. In contrast, nuclear microsatellite markers resolved four genetically distinct groups with a remarked genetic differentiation between the most distant locations, at the northern and southern boundaries of the species' range. High mean genetic diversity was found at all localities (Hs = 0.66-0.81). Notwithstanding, positive F IS and low effective population size (Ne = 77.9-496.4) were also recorded. Conclusions The distribution of genetic variation could be related to expansion-contraction cycles following seasonal temperature changes at transitional areas, promoting population subdivisions. However, we cannot rule out the effect of oceanographic dynamics to the observed patterns. Although this marine species remains highly abundant despite commercial exploitation, the low Ne values are of conservation concern and must be considered in fishery management plans.
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Affiliation(s)
- Maried Ochoa-Zavala
- Unidad de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnnología, Universidad Nacional Autónoma de México, CDMX, Mexico,Escuela Nacional de Estudios Superiores, Unidad Morelia, Universidad Nacional Autónoma de México, Morelia, Michoacán, Mexico
| | - Pindaro Diaz-Jaimes
- Unidad de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnnología, Universidad Nacional Autónoma de México, CDMX, Mexico
| | - Sofía Ortega-García
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, México
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, México
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11
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Pantoja-Echevarría LM, Marmolejo-Rodríguez AJ, Galván-Magaña F, Elorriaga-Verplancken FR, Tripp-Valdéz A, Tamburin E, Lara A, Jonathan M, Sujitha S, Delgado-Huertas A, Arreola-Mendoza L. Trophic structure and biomagnification of cadmium, mercury and selenium in brown smooth hound shark (Mustelus henlei) within a trophic web. Food Webs 2022. [DOI: 10.1016/j.fooweb.2022.e00263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Pantoja-Echevarría LM, Tamburin E, Elorriaga-Verplancken FR, Marmolejo-Rodríguez AJ, Galván-Magaña F, Tripp-Valdez A, Lara A, Jonathan MP, Sujitha SB, Delgado-Huertas A, Arreola-Mendoza L. How to stay together? Habitat use by three sympatric sharks in the western coast of Baja California Sur, Mexico. Environ Sci Pollut Res Int 2022; 29:61685-61697. [PMID: 35287199 DOI: 10.1007/s11356-022-19530-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
Sharks are top predators and play an important role in the regulation of marine ecosystems at lower trophic position. Mustelus californicus, Sphyrna zygaena, and Isurus oxyrinchus prove to be important fishery resources along the western coast of Baja California Sur and cohabit the same coastal areas, probably sharing resources. However, our knowledge about ecological dynamics of multiple species coexisting and sharing similar habitat resources is still limited, particularly for predators such as sharks. Therefore, this study focuses on the analysis of trophic ecology of the sharks species, using carbon (13C) and nitrogen (15N) stable isotope values in muscle tissues coupled with trace element concentration (Hg, Se, and Cd) in muscle and hepatic tissues of sharks. The values of δ13C (M. californicus -17.3 ± 1.1‰, S. zygaena -17.9 ± 0.5‰, and I. oxyrinchus -18.3 ± 0.3‰) and δ15N (M. californicus 18.2 ± 1.1‰, S. zygaena 18.4 ± 0.9‰, and I. oxyrinchus 17.8 ± 1.1‰) indicated that these species feed in the Gulf of Ulloa all throughout the year, and for extended periods with similar habitat use and trophic niche. The above-mentioned statement is also a conclusion supported by the significant correlation between isotopic and trace element concentrations in the muscular tissues in all studied species. Thus, the results of the present study emphasize the habitat and niche characteristics of three sympatric sharks off the coast of Baja California Sur, Mexico.
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Affiliation(s)
| | - Elena Tamburin
- Fundación Alium Pacific, Carrera 26 No. 5C-13, Cali, Colombia
| | | | - Ana Judith Marmolejo-Rodríguez
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096, La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096, La Paz, Baja California Sur, Mexico
| | - Arturo Tripp-Valdez
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096, La Paz, Baja California Sur, Mexico
| | - Ariagna Lara
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096, La Paz, Baja California Sur, Mexico
| | - M P Jonathan
- Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P. 07340, Ciudad de Mexico, Mexico
| | - S B Sujitha
- Escuela Superior de Ingeniería y Arquitectura (ESIA), Instituto Politécnico Nacional (IPN), Unidad Ticoman, Calz. Ticomán 600, Delg. Gustavo A. Madero, C.P. 07340, Ciudad de México (CDMX), Mexico
| | - Antonio Delgado-Huertas
- Laboratorio de Biogeoquímica de Isótopos Estables, Instituto Andaluz de Ciencias de la Tierra IACT (CSIC-UGR), Avda. de las Palmeras, 4, 18100, Armilla, Granada, Spain
| | - Laura Arreola-Mendoza
- Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P. 07340, Ciudad de Mexico, Mexico
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13
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Martínez-Ayala JC, Galván-Magaña F, Tripp-Valdez A, Marmolejo-Rodríguez AJ, Piñón-Gimate A, Huerta-Diaz MA, Sánchez-González A. Heavy metal concentrations in the Pacific sharpnose shark Rhizoprionodon longurio from the Santa Rosalia mining zone, Baja California Sur, Mexico. Mar Pollut Bull 2022; 182:114018. [PMID: 35963222 DOI: 10.1016/j.marpolbul.2022.114018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 07/22/2022] [Accepted: 07/31/2022] [Indexed: 06/15/2023]
Abstract
Rhizoprionodon longurio is an important commercial species captured in an area with heavy metal presence due to the mining waste from Santa Rosalia, Gulf of California, and levels of heavy metals in its muscle remain unknown. This study aimed to investigate whether contamination levels are below the limits allowed for human consumption and to prevent health damage. Concentrations of essential (Cu, Fe, Mn, and Zn) and non-essential (Ag, Cd, and Pb) trace elements were determined in fifty-seven muscle samples of R. longurio. The average concentrations of Fe > Zn > Cu > Mn > Cd > Ag did not exceed the permissible limits for human consumption established by the Mexican norm, WHO, and FAO. The mineral daily ingestion was 0.10 to 0.53 % × 100 g of muscle, and the percentage of weekly consumption was 2.5 % to <12 % concerning corporal weight. The meat from this shark can be consumed due to its low toxic potential for human health.
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Affiliation(s)
- Julio Cesar Martínez-Ayala
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Arturo Tripp-Valdez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | | | - Alejandra Piñón-Gimate
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Miguel Angel Huerta-Diaz
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada, Baja California, Mexico
| | - Alberto Sánchez-González
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico.
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14
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Baró-Camarasa I, Marmolejo-Rodríguez AJ, Cobelo-García A, Palacios MD, Murillo-Cisneros DA, Galván-Magaña F. Essential and non-essential trace element concentrations in muscle and liver of a pregnant Munk's pygmy devil ray (Mobula munkiana) and its embryo. Environ Sci Pollut Res Int 2022; 29:61623-61629. [PMID: 34775562 DOI: 10.1007/s11356-021-17390-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
During gestation, essential and non-essential trace elements are transferred from the pregnant females to embryos. This study aimed to determine and compare the concentrations of seven essential trace elements (Fe, Zn, Se, Cu, Mn, Cr, Co) and six non-essential trace elements (As, Cd, V, U, Tl, Ag) in the muscle and the liver of a Munk's pygmy devil ray pregnant female, Mobula munkiana, and its embryo. Transfer evidence of essential and non-essential trace elements was detected in M. munkiana tissues. Arsenic was found in elevated concentrations in the pregnant female and the embryo tissues. Elevated levels of Cd, V, U, and Ag were found in the pregnant female liver, but were minimal in the embryo tissue. This is the first study to investigate maternal transfer of essential and non-essential trace elements in these species and their reproductive strategy.
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Affiliation(s)
- Isis Baró-Camarasa
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. I.P.N. s/n, Colonia Playa Palo de Santa Rita, Apartado Postal 592, La Paz, 23000, Baja California Sur, Mexico
| | - Ana Judith Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. I.P.N. s/n, Colonia Playa Palo de Santa Rita, Apartado Postal 592, La Paz, 23000, Baja California Sur, Mexico
| | | | - Marta D Palacios
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. I.P.N. s/n, Colonia Playa Palo de Santa Rita, Apartado Postal 592, La Paz, 23000, Baja California Sur, Mexico
- Pelagios Kakunjá A.C, 23060, La Paz, Baja California Sur, Mexico
- Mobula Conservation, La Paz, 23075, Mexico
| | - Daniela Alejandra Murillo-Cisneros
- Centro de Investigaciones Biológicas del Noroeste, S.C. Planeación Ambiental Y Conservación. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, 23096, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. I.P.N. s/n, Colonia Playa Palo de Santa Rita, Apartado Postal 592, La Paz, 23000, Baja California Sur, Mexico.
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15
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Muñoz-Abril L, Torres MDL, Valle CA, Rubianes-Landázuri F, Galván-Magaña F, Canty SWJ, Terán MA, Brandt M, Chaves JA, Grewe PM. Lack of genetic differentiation in yellowfin tuna has conservation implications in the Eastern Pacific Ocean. PLoS One 2022; 17:e0272713. [PMID: 36040879 PMCID: PMC9426925 DOI: 10.1371/journal.pone.0272713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 07/25/2022] [Indexed: 11/19/2022] Open
Abstract
Yellowfin tuna, Thunnus albacares, is an important global fishery and of particular importance in the Eastern Pacific Ocean (EPO). According to the 2019 Inter-American Tropical Tuna Commission (IATTC) assessment, yellowfin tuna within the EPO is a single stock, and is being managed as one stock. However, previous studies indicate site fidelity, or limited home ranges, of yellowfin tuna which suggests the potential for multiple yellowfin tuna stocks within the EPO, which was supported by a population genetic study using microsatellites. If numerous stocks are present, management at the wrong spatial scales could cause the loss of minor yellowfin tuna populations in the EPO. In this study we used double digestion RADseq to assess the genetic structure of yellowfin tuna in the EPO. A total of 164 yellowfin tuna from Cabo San Lucas, México, and the Galápagos Islands and Santa Elena, Ecuador, were analysed using 18,011 single nucleotide polymorphisms. Limited genetic differentiation (FST = 0.00058–0.00328) observed among the sampling locations (México, Ecuador, Peru, and within Ecuador) is consistent with presence of a single yellowfin tuna population within the EPO. Our findings are consistent with the IATTC assessment and provide further evidence of the need for transboundary cooperation for the successful management of this important fishery throughout the EPO.
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Affiliation(s)
- Laia Muñoz-Abril
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
- Department of Marine Sciences, University of South Alabama, USA Drive North, Mobile, Alabama, United States of America
- * E-mail:
| | - Maria de Lourdes Torres
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Carlos A. Valle
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Francisco Rubianes-Landázuri
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, México
| | - Steven W. J. Canty
- Smithsonian Marine Station Fort Pierce, Fort Pierce, Florida, United States of America
- Working Land and Seascapes, Smithsonian Institution, Washington, DC, United States of America
| | - Martin A. Terán
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Margarita Brandt
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Jaime A. Chaves
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
- Department of Biology, San Francisco State University, San Francisco, CA, United States of America
| | - Peter M. Grewe
- CSIRO Oceans & Atmosphere, Castray Esplanade, Hobart, Tasmania, Australia
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16
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Castro-Rendón RD, Calle-Morán MD, García-Arévalo I, Ordiano-Flores A, Galván-Magaña F. Mercury and Cadmium Concentrations in Muscle Tissue of the Blue Shark (Prionace glauca) in the Central Eastern Pacific Ocean. Biol Trace Elem Res 2022; 200:3400-3411. [PMID: 34599733 DOI: 10.1007/s12011-021-02932-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 09/14/2021] [Indexed: 03/19/2023]
Abstract
Blue sharks (Prionace glauca) are an important resource in Ecuador's fisheries; however, biological and ecological information of this species in the area is scarce. The goal of this study was to determine Hg and Cd concentration levels in muscle tissue, as well as its relationship with size, sex, and sexual maturity stages. A total of 80 specimens (34 females and 46 males) collected from the Ecuadorian longline fishing fleet between June and December 2012 were examined. Sizes for females ranged from 97 to 280 cm total length, with values of Hg between 0.20 to 2.38 mg kg-1 wet weight (x̄ = 0.71, ± 0.61) and values of Cd between 0.01 and 0.12 mg kg-1 (x̄ = 0.04, ± 0.02). Sizes for males ranged from 137 to 290 cm TL with values of Hg between 0.17 and 2.94 mg kg-1 (x̄ = 0.81, ± 0.68) and Cd concentrations between 0.01 and 0.12 mg kg-1 (x̄ = 0.04, ± 0.03). A Spearman's rank correlation showed a medium positive association between TL and Hg concentrations (ρ = 0.66; p < 0.05), but there was no correlation between TL and Cd concentrations (ρ = 0.00, p < 0.05). Of the analyzed sharks, 46% and 20% had Hg and Cd concentrations, respectively, greater than the limit established by authorities for fishes consumed by humans.
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Affiliation(s)
- Rubén D Castro-Rendón
- Facultad de Artes Y Ciencias Liberales, Universidad de Especialidades Espíritu Santo (UEES), Escuela de Ciencias Ambientales, Km 2.5 vía La Puntilla, C.P. 092301, Guayaquil, Ecuador
| | - Marcos D Calle-Morán
- Facultad de Ciencias del Mar, Programa de Doctorado en Ciencias Con Mención en Recursos Acuáticos, Universidad Autónoma de Sinaloa, Paseo Clausen S/N, C.P. 82000, Mazatlán, Mexico
| | - Isabel García-Arévalo
- Facultad de Ciencias del Mar, Programa de Doctorado en Ciencias Con Mención en Recursos Acuáticos, Universidad Autónoma de Sinaloa, Paseo Clausen S/N, C.P. 82000, Mazatlán, Mexico
- Laboratoire de Biogéochimie Des Contaminants Métalliques, Ifremer, Centre Atlantique, 44311 Cedex 3, Nantes, France
| | - Alfredo Ordiano-Flores
- Centro de Investigación Y Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana No. 3918, Zona Playitas, 22860, Ensenada, C.P, Mexico
| | - Felipe Galván-Magaña
- Instituto Politecnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n. C.P. 23096, La Paz, Mexico.
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17
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Baró-Camarasa I, Marmolejo-Rodríguez AJ, O'Hara TM, Castellini JM, Murillo-Cisneros DA, Martínez-Rincón RO, Elorriaga-Verplancken FR, Galván-Magaña F. Mercury maternal transfer in two placental sharks and a yolk-sac ray from Baja California Sur, Mexico. Mar Pollut Bull 2022; 179:113672. [PMID: 35512518 DOI: 10.1016/j.marpolbul.2022.113672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 04/13/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
Total mercury (THg) concentrations were measured in muscle and liver of two placental viviparous sharks, the Pacific sharpnose shark (Rhizoprionodon longurio) and the brown smooth-hound (Mustelus henlei); as well as in the muscle, liver, and yolk of the yolk-sac viviparous speckled guitarfish (Pseudobatos glaucostigmus) in Baja California Sur. The aim was to determine which factors could be involved in maternal transfer and resultant maternal and embryonic THg concentration. Higher THg concentrations were found in pregnant females compared to embryos paired tissues. THg concentrations of embryo tissues decreased with total length (TL), except for the muscle of the Pacific sharpnose shark. THg concentrations of embryo muscle was positively related to THg concentration in the muscle of pregnant females. Embryos TL, muscle THg concentration of pregnant females, percentage of THg concentration in embryos, along with the reproductive strategy are relevant factors required to improve our understanding of THg concentration in embryo tissues.
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Affiliation(s)
- Isis Baró-Camarasa
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur C.P. 23096, Mexico
| | - Ana J Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur C.P. 23096, Mexico
| | - Todd M O'Hara
- Bilingual Laboratory of Toxicology, Dept. of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, C.P. 4461, TX, USA; Department of Veterinary Medicine, University of Alaska Fairbanks, C.P. 99775, AK, USA
| | - J Margaret Castellini
- Department of Veterinary Medicine, University of Alaska Fairbanks, C.P. 99775, AK, USA
| | - Daniela A Murillo-Cisneros
- Centro de Investigaciones Biológicas del Noroeste, S.C. Planeación Ambiental y Conservación, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, Baja California Sur C.P. 23096, Mexico
| | - Raúl O Martínez-Rincón
- CONACYT-Centro de Investigaciones Biológicas del Noroeste, S.C. La Paz, Baja California Sur C.P. 23096, Mexico
| | | | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur C.P. 23096, Mexico.
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18
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Canfield SJ, Galván-Magaña F, Bowen BW. Little Sharks in a Big World: Mitochondrial DNA Reveals Small-scale Population Structure in the California Horn Shark (Heterodontus francisci). J Hered 2022; 113:298-310. [PMID: 35438775 DOI: 10.1093/jhered/esac008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 02/22/2022] [Indexed: 11/13/2022] Open
Abstract
The California horn shark (Heterodontus francisci) is a small demersal species distributed from southern California and the Channel Islands to Baja California and the Gulf of California. These nocturnal reef predators maintain small home-ranges as adults, and lay auger-shaped egg cases that become wedged into the substrate. While population trends are not well documented, this species is subject to fishing pressure through portions of its range and has been identified as vulnerable to overexploitation. Here we present a survey of 318 specimens from across the range, using mtDNA control region sequences to provide the first genetic assessment of H. francisci. Overall population structure (ΦST = 0.266, P < 0.001) is consistent with limited dispersal as indicated by life history, with two distinct features. Population structure along the continuous coastline is low, with no discernable breaks from Santa Barbara, CA to Bahia Tortugas (Baja California Sur, Mexico); however, there is a notable partition at Punta Eugenia (BCS), a well-known biogeographic break between tropical and subtropical marine faunas. In contrast, population structure is much higher (max ΦST = 0.601, P < 0.05) between the coast and adjacent Channel Islands, a minimum distance of 19 km, indicating that horn sharks rarely disperse across deep habitat and open water. Population structure in most elasmobranchs is measured on a scale of hundreds to thousands of kilometers, but the California Horn Shark has population partitions on an unprecedented small scale, indicating a need for localized management strategies which ensure adequate protection of distinct stocks.
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Affiliation(s)
- Sean J Canfield
- School of Life Sciences, University of Hawai'i at Mānoa, Honolulu, HI, USA.,Hawai'i Institute of Marine Biology, University of Hawai'i at Mānoa, Kaneohe, HI, USA
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, México
| | - Brian W Bowen
- Hawai'i Institute of Marine Biology, University of Hawai'i at Mānoa, Kaneohe, HI, USA
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19
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Lara A, Galván-Magaña F, Elorriaga-Verplancken FR, Marmolejo-Rodríguez AJ, González-Armas R, Arreola-Mendoza L, Sujitha SB, Jonathan MP, Pantoja-Echevarría LM. Mercury, selenium and cadmium in juvenile blue (Prionace glauca) and smooth hammerhead (Sphyrna zygaena) sharks from the Northwest Mexican Pacific coast. Mar Pollut Bull 2022; 175:113311. [PMID: 35092935 DOI: 10.1016/j.marpolbul.2021.113311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
Cadmium, selenium, and mercury concentrations were measured in muscle and liver of juvenile blue (Prionace glauca) and smooth hammerhead (Sphyrna zygaena) sharks caught on the west coast of Baja California Sur, Mexico, to evaluate the human health risk associated with its consumption. Cd and Hg were lower than the maximum allowable limit for human consumption established by the Mexican government (Hg = 1.0 μg g-1 and Cd = 0.50 μg g-1). Interspecific differences in trace elements accumulation denoted diet variations and physiological requirements of each shark species. Calculated biomagnification factor (BMF) values confirmed a prey-predator trophic transfer of elements. Not significant results of Selenium health benefit Index value (P. glauca = -0.46; S. zygaena = -0.02) signify no potential risks for human health. However, calculated Hazard Index values displayed possible health hazards to the children who consume blue shark meat regularly. The local population is advised regarding the ingestion rates of shark.
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Affiliation(s)
- Ariagna Lara
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico.
| | - Fernando R Elorriaga-Verplancken
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Ana Judith Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Rogelio González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Laura Arreola-Mendoza
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P. 07340 Ciudad de México, Mexico
| | - S B Sujitha
- Instituto Politécnico Nacional, Escuela Superior de Ingeniería y Arquitectura (ESIA), Unidad Ticoman, Calz. Ticomán 600, C.P. 07340 Ciudad de México, Mexico
| | - M P Jonathan
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P. 07340 Ciudad de México, Mexico
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20
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Ángel-Moreno Briones Á, Hernández-Guzmán FA, González-Armas R, Galván-Magaña F, Marmolejo-Rodríguez AJ, Sánchez-González A, Ramírez-Álvarez N. Organochlorine pesticides in immature scalloped hammerheads Sphyrna lewini from the western coast of the Gulf of California, Mexico: Bioaccumulation patterns and human exposure. Sci Total Environ 2022; 806:151369. [PMID: 34740652 DOI: 10.1016/j.scitotenv.2021.151369] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 10/26/2021] [Accepted: 10/28/2021] [Indexed: 06/13/2023]
Abstract
Despite the intensive use of organochlorine pesticides (OCPs) in the proximity of the Gulf of California, there is no information regarding their levels in predatory shark species, which could be exposed to relatively high concentrations. In this area, neonates and juveniles of the critically endangered scalloped hammerhead Sphyrna lewini are caught for consumption, so the examination of the accumulation of OCPs is necessary for future conservation, as well as to assess the exposure to humans. Levels and accumulation patterns of 29 OCPs were analyzed in the liver and muscle of 20 immature scalloped hammerheads. Twenty-three compounds were detected in liver and 17 OCPs were found in muscle. In the latter tissue, only p,p'-DDE presented concentrations above the detection limit in all samples (0.59 ± 0.21 ng/g w.w.), while in the liver, DDTs were also the main group of pesticides (215 ± 317 ng/g w.w.), followed by ∑Chlordanes > ∑Chlorobenzenes > Mirex > HCBD > Others. One of the two analyzed neonates presented high concentrations of OCPs in the liver (1830 ng/g w.w.), attributed to a bioamplification process. No differences in accumulation of OCPs were found between juveniles of both sexes, where an increase in the concentration of various compounds related with size and age was observed. Additionally, juveniles under 2 years of age may undergo a growth dilution process. Our results suggest that the consumption of this species does not imply risks to human health (chronic or carcinogenic effects) associated with OCPs. Likewise, we recommend further monitoring due to the possible recent inputs of some OCPs (e.g. dicofol, median of ratio o, p'-DDT/p, p'-DDT = 0.7) into the environment.
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Affiliation(s)
- Ángela Ángel-Moreno Briones
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, Baja California Sur C. P. 23096, Mexico
| | - Félix Augusto Hernández-Guzmán
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana 3917, Ensenada, Baja California C. P. 22860, Mexico
| | - Rogelio González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, Baja California Sur C. P. 23096, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, Baja California Sur C. P. 23096, Mexico
| | - Ana Judith Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, Baja California Sur C. P. 23096, Mexico
| | - Alberto Sánchez-González
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, Baja California Sur C. P. 23096, Mexico
| | - Nancy Ramírez-Álvarez
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana 3917, Ensenada, Baja California C. P. 22860, Mexico.
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21
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Pancaldi F, Páez-Osuna F, Soto-Jiménez MF, Whitehead DA, González-Armas R, Vázquez-Haikin A, Becerril-García EE, Galván-Magaña F. Concentrations of Silver, Chrome, Manganese and Nickel in Two Stranded Whale Sharks (Rhincodon typus) from the Gulf of California. Bull Environ Contam Toxicol 2021; 107:827-832. [PMID: 33904943 DOI: 10.1007/s00128-021-03244-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 04/18/2021] [Indexed: 06/12/2023]
Abstract
Concentrations of Ag, Cr, Mn and Ni were measured in tissues of two whale sharks (Rhincodon typus) stranded in La Paz Bay (LAP) and Punta Bufeo (PB), Gulf of California, during 2017 and 2018. The concentration range of Ni (0.012-1.12 µg/g ww) and Cr (0.16-5.21) in the epidermis of both specimens was lower compared to the concentrations found in the epidermis of whale sharks from East Africa. The whale shark from LAP exhibited higher levels of Mn (4.45 µg/g ww), Ni (0.284 µg/g ww) and Cr (5.21 µg/g ww) in the muscle compared to another filter feeder shark, the megamouth, from Taiwan and from Brazil. The highest concentrations of Ag were found in the heart (3.70) of the individual from LAP and in the filtering pads (1.93) of the shark from PB. Chromium in all selected tissues and the Mn found in the skeletal muscle, testicles (0.50), liver (Right lobe, 1.28; Left lobe, 1.63) and gills (1.54) of both sharks exceeded the limit established by the FAO/WHO for fish products.
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Affiliation(s)
- Francesca Pancaldi
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, 23096, La Paz, BCS, México
| | - Federico Páez-Osuna
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, 82040, Mazatlán, Sinaloa, México
- Miembro de El Colegio de Sinaloa, Antonio Rosales 435 Poniente, Culiacán, Sinaloa, México
| | - Martín Federico Soto-Jiménez
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, 82040, Mazatlán, Sinaloa, México
| | - Darren A Whitehead
- Pelagios Kakunjá A.C, Sinaloa 1540, Las Garzas, 23070, La Paz, BCS, México
| | - Rogelio González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, 23096, La Paz, BCS, México
| | - Abraham Vázquez-Haikin
- Asociación de Pesca Deportiva Y Ecoturismo de Bahía de Los Ángeles, Domicilio Conocido, 22980, Bahía de Los Ángeles, Baja California, México
| | - Edgar Eduardo Becerril-García
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, 23096, La Paz, BCS, México
- Pelagios Kakunjá A.C, Sinaloa 1540, Las Garzas, 23070, La Paz, BCS, México
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, 23096, La Paz, BCS, México.
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22
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Ayres KA, Ketchum JT, González-Armas R, Galván-Magaña F, Hearn A, Elorriaga-Verplancken FR, Hoyos-Padilla EM, Kajiura SM. The use of an unoccupied aerial vehicle to survey shark species over sand and rocky-reef habitats in a marine protected area. J Fish Biol 2021; 99:1735-1740. [PMID: 34180053 DOI: 10.1111/jfb.14838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 06/15/2021] [Accepted: 06/24/2021] [Indexed: 06/13/2023]
Abstract
Cabo Pulmo National Park was established in 1995 and has since seen a large increase in fish biomass. An unoccupied aerial vehicle (UAV) was used to survey shallow coastal habitat in which lemon sharks (Negaprion brevirostris), bull sharks (Carcharhinus leucas) and Pacific nurse sharks (Ginglymostoma unami) were recorded. Sharks were more common in the afternoon, potentially using warmer shallow areas to behaviourally thermoregulate. This study highlights UAV surveying to be a viable tool for species identification, a limitation of previous terrestrial surveys conducted in the area.
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Affiliation(s)
- Kathryn A Ayres
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
- Pelagios Kakunjá A.C., La Paz, Mexico
| | - James T Ketchum
- Pelagios Kakunjá A.C., La Paz, Mexico
- Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, Mexico
- MigraMa, Olema, California, USA
| | - Rogelio González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Alex Hearn
- MigraMa, Olema, California, USA
- Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Diego de Robles y Vía Interoceánica, Quito, Ecuador
| | | | - Edgar M Hoyos-Padilla
- Pelagios Kakunjá A.C., La Paz, Mexico
- MigraMa, Olema, California, USA
- Fins Attached: Marine Research and Conservation, Colorado Springs, Colorado, USA
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23
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Becerril-García EE, Pancaldi F, Cruz-Villacorta AA, Rivera-Camacho AR, Aguilar-Cruz CA, Whitehead DA, González-Armas R, Arellano-Martínez M, Galván-Magaña F. General descriptions of the dermis structure of a juvenile whale shark Rhincodon typus from the Gulf of California. J Fish Biol 2021; 99:1524-1528. [PMID: 34159587 DOI: 10.1111/jfb.14827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 05/25/2021] [Accepted: 06/09/2021] [Indexed: 06/13/2023]
Abstract
The aim of this study is to provide preliminary observations on the microanatomy of Rhincodon typus skin using histology and electron microscopy analyses. Skin biopsies were obtained from a deceased juvenile male shark (548 cm total length) stranded in La Paz, Mexico, during February 2018. The results of this study evidenced the basic structure of the dermal denticles in the epidermis of the trunk of the shark, as well as the composition of the connective tissue in the hypodermis. Histological images of the hypodermis showed a high concentration of collagen fibres, formed by a large number of fine and wavy fibres of compact shape and little intercellular substance.
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Affiliation(s)
- Edgar E Becerril-García
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, La Paz, Mexico
- Pelagios Kakunjá A.C, La Paz, Mexico
| | - Francesca Pancaldi
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, La Paz, Mexico
| | | | - Alma R Rivera-Camacho
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, La Paz, Mexico
| | - Carlos A Aguilar-Cruz
- Departamento Académico de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, La Paz, Mexico
| | - Darren A Whitehead
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, La Paz, Mexico
- Pelagios Kakunjá A.C, La Paz, Mexico
| | - Rogelio González-Armas
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, La Paz, Mexico
| | | | - Felipe Galván-Magaña
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, La Paz, Mexico
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24
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Larson S, Lowry D, Dulvy NK, Wharton J, Galván-Magaña F, Sianipar AB, Lowe CG, Meyer E. Current and future considerations for shark conservation in the Northeast and Eastern Central Pacific Ocean. Adv Mar Biol 2021; 90:1-49. [PMID: 34728053 DOI: 10.1016/bs.amb.2021.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Sharks are iconic and ecologically important predators found in every ocean. Because of their ecological role as predators, some considered apex predators, and concern over the stability of their populations due to direct and indirect overfishing, there has been an increasing amount of work focussed on shark conservation, and other elasmobranchs such as skates and rays, around the world. Here we discuss many aspects of current shark science and conservation and the path to the future of shark conservation in the Northeastern and Eastern Central Pacific. We explore their roles in ecosystems as keystone species; the conservation measures and laws in place at the international, national, regional and local level; the conservation status of sharks and rays in the region, fisheries for sharks in the Northcentral Pacific specifically those that target juveniles and the implications to shark conservation; a conservation success story: the recovery of Great White Sharks in the Northeast Pacific; public perceptions of sharks and the roles zoos and aquariums play in shark conservation; and the path to the future of shark conservation that requires bold partnerships, local stakeholders and innovative measures.
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Affiliation(s)
- Shawn Larson
- Seattle Aquarium, Conservation Programs and Partnerships, Seattle, WA, United States.
| | - Dayv Lowry
- National Marine Fisheries Service, West Coast Region, Protected Resources Division, Lacey, WA, United States
| | - Nicholas K Dulvy
- Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Jim Wharton
- Seattle Aquarium, Conservation Engagement and Learning, Seattle, WA, United States
| | - Felipe Galván-Magaña
- Instituto Politécnico National, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Abraham B Sianipar
- Murdoch University, School of Veterinary and Life Sciences, Perth, WA, Australia
| | - Christopher G Lowe
- California State University Long Beach Shark Lab, Long Beach, CA, United States
| | - Erin Meyer
- Seattle Aquarium, Conservation Programs and Partnerships, Seattle, WA, United States
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25
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Pelamatti T, Rios-Mendoza LM, Hoyos-Padilla EM, Galván-Magaña F, De Camillis R, Marmolejo-Rodríguez AJ, González-Armas R. Contamination knows no borders: Toxic organic compounds pollute plastics in the biodiversity hotspot of Revillagigedo Archipelago National Park, Mexico. Mar Pollut Bull 2021; 170:112623. [PMID: 34146855 DOI: 10.1016/j.marpolbul.2021.112623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 06/04/2021] [Accepted: 06/05/2021] [Indexed: 06/12/2023]
Abstract
Plastic pollution is ubiquitous and not even remote protected islands are safe from it. Floating debris can adsorb toxic compounds that concentrate on their surface, being available to the animals that ingest them. For this reason, a baseline study of plastic pollution was conducted in the remote Revillagigedo Archipelago, in the Mexican Pacific Ocean. In 47 manta net samples an average of 4.8 plastics/1000m2 was found, 73% of the pieces being <5 mm. Polyethylene and polypropylene were the most common polymers found. The chemical analysis of organic pollutants revealed that organochlorine pesticides, polycyclic aromatic hydrocarbons and polychlorinated biphenyls are adsorbed on the plastics collected in the area. Filter feeding megafauna such as humpback whales, manta rays and whale sharks could ingest contaminated micro and macroplastics. Plastics were found also on the beach, where they are available to the ingestion by terrestrial animals, including endemic species endangered to extinction.
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Affiliation(s)
- Tania Pelamatti
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Av. IPN s/n, Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico; Pelagios Kakunja A.C., Sinaloa 1540, Las Garzas, 23070 La Paz, Baja California Sur, Mexico.
| | - Lorena M Rios-Mendoza
- University of Wisconsin-Superior, Department of Natural Sciences, Chemistry Program, Belknap and Catlin, PO Box 2000, Superior, WI 54880, USA
| | - Edgar M Hoyos-Padilla
- Pelagios Kakunja A.C., Sinaloa 1540, Las Garzas, 23070 La Paz, Baja California Sur, Mexico; Fins Attached Marine Research and Conservation, Colorado Springs 80908, USA
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Av. IPN s/n, Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Roberto De Camillis
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Av. IPN s/n, Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Ana J Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Av. IPN s/n, Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Rogelio González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Av. IPN s/n, Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
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26
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Pantoja-Echevarría LM, Marmolejo-Rodríguez AJ, Galván-Magaña F, Elorriaga-Verplancken FR, Tripp-Valdez A, Tamburin E, Lara A, Jonathan MP, Sujitha SB, Arreola-Mendoza L. Mercury and selenium concentrations in different tissues of brown smooth-hound shark (Mustelus henlei) from the western coast of Baja California Sur, Mexico. Mar Pollut Bull 2021; 170:112609. [PMID: 34157537 DOI: 10.1016/j.marpolbul.2021.112609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 06/13/2023]
Abstract
A study on mercury (Hg) and selenium (Se) concentrations in the liver and muscle of brown smooth-hound shark Mustelus henlei and its principal prey items, was conducted in the western coast of Baja California Sur, Mexico. Average Hg concentrations were found to be high in the muscle than in the liver; however, Hg concentrations were below the maximum permissible limits, and hence, the consumption of this species does not constitute a risk to human health. The mean Se concentrations were higher in the liver than in the muscle. The results of Hg: Se molar ratio revealed that Se counteracts the toxicity of Hg in hepatic tissues, whereas the contrary occurs in the muscle. Significant differences in Hg and Se accumulation were observed between females and males. Biomagnification factor values >1 demonstrate a biomagnification process from its principal prey species (i.e., red crab, Pleuroncodes planipes and Pacific mackerel, Scomber japonicus).
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Affiliation(s)
| | - Ana Judith Marmolejo-Rodríguez
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico.
| | - Fernando R Elorriaga-Verplancken
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Arturo Tripp-Valdez
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Elena Tamburin
- Fundación Alium Pacific, Carrera 26 No. 5C-13, Cali, Colombia
| | - Ariagna Lara
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - M P Jonathan
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P.07340, Ciudad de Mxico, Mexico
| | - S B Sujitha
- Instituto Politécnico Nacional (IPN), Escuela Superior de Ingeniería y Arquitectura (ESIA), Unidad Ticoman, Calz. Ticomán 600, Delg. Gustavo A. Madero, C.P. 07340, Ciudad de México (CDMX), Mexico
| | - Laura Arreola-Mendoza
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P.07340, Ciudad de Mxico, Mexico
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27
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Ordiano-Flores A, Galván-Magaña F, Sánchez-González A, Soto-Jiménez MF, Páez-Osuna F. Mercury, selenium, and stable carbon and nitrogen isotopes in the striped marlin Kajikia audax and blue marlin Makaira nigricans food web from the Gulf of California. Mar Pollut Bull 2021; 170:112657. [PMID: 34217052 DOI: 10.1016/j.marpolbul.2021.112657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 06/15/2021] [Accepted: 06/17/2021] [Indexed: 06/13/2023]
Abstract
Mercury (Hg) concentrations based on dietary sources have shown to predict differences in fish; however, they are usually applied at an individual scale and are rarely directed at a known trophic transfer. We combined gut content analysis and stable isotope analysis (δ15N and δ13C) to provide a quantitative estimate of Hg and selenium (Se) biomagnification in the striped marlin (Kajikia audax) and blue marlin (Makaira nigricans) food web from the southwestern Gulf of California. Hg and Se concentrations (mean ± SD; μg g-1, dw) were different among K. audax (Hg = 3.6 ± 2.1, Se = 5.5 ± 5.4) and M. nigricans (Hg = 19.0 ± 29.6, Se = 8.8 ± 10.5). Such variations of element concentrations could be linked to predation with different Hg and Se contents. Diet data presented as prey weight (%W) indicated a higher proportion of large prey fish for the blue marlin than the striped marlin. δ15N and δ13C indicated pelagic food sources with epipelagic preferences for the blue marlin and mesopelagic for the striped marlin. The relationship between Hg concentrations and δ15N was positive along the food web of both marlin species, indicating biomagnification of Hg. However, Se biomagnification was not clearly evidenced, and Se:Hg ratios decreased with δ15N, attributed to increasing Hg concentrations with increased trophic level.
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Affiliation(s)
- Alfredo Ordiano-Flores
- Universidad Nacional Autónoma de México, Posgrado en Ciencias del Mar y Limnología, Av. Ciudad Universitaria 3000, C.P. 04510 Coyoacán, Ciudad de México, Mexico; Ecosystem and Food Web Lab, Department of Biological Oceanography, Center for Scientific Research and Higher Education at Ensenada (C I C E S E), Carretera Ensenada-Tijuana No. 3918, Zona Playitas, C.P. 22860, Ensenada, B.C. Mexico.
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN S/N Col. Playa de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico.
| | - Alberto Sánchez-González
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN S/N Col. Playa de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico.
| | - Martín F Soto-Jiménez
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, C.P. 82000 Mazatlán, Sinaloa, Mexico.
| | - Federico Páez-Osuna
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, C.P. 82000 Mazatlán, Sinaloa, Mexico; Miembro de El Colegio de Sinaloa, Antonio Rosales 453 Pte, Culiacán, Sinaloa, Mexico.
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28
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Bernal-Pérez S, Ochoa-Báez RI, Galván-Magaña F, Soto-López K. Reproductive biology of the swell shark Cephaloscyllium ventriosum (Carcharhiniformes: Scyliorhinidae). J Fish Biol 2021; 99:818-830. [PMID: 33900630 DOI: 10.1111/jfb.14765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/13/2021] [Accepted: 04/21/2021] [Indexed: 06/12/2023]
Abstract
The Cephaloscyllium ventriosum shark is present in the artisanal fisheries of elasmobranchs on the western coast of Baja California Sur, Mexico. The main characteristics of the sexual maturation of this species based on individuals captured from off north-west Mexico in 2013-2016 are described. The size at maturity of this species was determined for the first time (total length 82 cm for females and 76 cm for males). Most females had one egg case per one uterus, and two per one uterus was an isolated event of low incidence. From the histological analysis of females, it was possible to show sperm storage in the oviducal gland. Fully developed sperm in immature organisms were identified in the testes. The main indicator of the maturity stage of males and their mating activity is the clasper. The present study provides evidence for a reliable estimation of the sexual maturity of these organisms, demonstrating the need for the combination of macroscopic and microscopic methods.
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Affiliation(s)
- Stephanie Bernal-Pérez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Rosa Isabel Ochoa-Báez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Katherin Soto-López
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
- Escuela de Sistemas Biológicos e Innovación Tecnológica, Universidad Autónoma Benito Juárez de Oaxaca (ESBIT-UABJO), Oaxaca de Juárez, Mexico
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29
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Besnard L, Le Croizier G, Galván-Magaña F, Point D, Kraffe E, Ketchum J, Martinez Rincon RO, Schaal G. Foraging depth depicts resource partitioning and contamination level in a pelagic shark assemblage: Insights from mercury stable isotopes. Environ Pollut 2021; 283:117066. [PMID: 33892372 DOI: 10.1016/j.envpol.2021.117066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
The decline of shark populations in the world ocean is affecting ecosystem structure and function in an unpredictable way and new ecological information is today needed to better understand the role of sharks in their habitats. In particular, the characterization of foraging patterns is crucial to understand and foresee the evolution of dynamics between sharks and their prey. Many shark species use the mesopelagic area as a major foraging ground but the degree to which different pelagic sharks rely on this habitat remains overlooked. In order to depict the vertical dimension of their trophic ecology, we used mercury stable isotopes in the muscle of three pelagic shark species (the blue shark Prionace glauca, the shortfin mako shark Isurus oxyrinchus and the smooth hammerhead shark Sphyrna zygaena) from the northeastern Pacific region. The Δ199Hg values, ranging from 1.40 to 2.13‰ in sharks, suggested a diet mostly based on mesopelagic prey in oceanic habitats. We additionally used carbon and nitrogen stable isotopes (δ13C, δ15N) alone or in combination with Δ199Hg values, to assess resource partitioning between the three shark species. Adding Δ199Hg resulted in a decrease in trophic overlap estimates compared to those based on δ13C/δ15N alone, demonstrating that multi-isotope modeling is needed for accurate trophic description of the three species. Mainly, it reveals that they forage at different average depths and that resource partitioning is mostly expressed through the vertical dimension within pelagic shark assemblages. Concomitantly, muscle total mercury concentration (THg) differed between species and increased with feeding depth. Overall, this study highlights the key role of the mesopelagic zone for shark species foraging among important depth gradients and reports new ecological information on trophic competition using mercury isotopes. It also suggests that foraging depth may play a pivotal role in the differences between muscle THg from co-occurring high trophic level shark species.
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Affiliation(s)
- Lucien Besnard
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France.
| | - Gaël Le Croizier
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 Avenue Edouard Belin, 31400, Toulouse, France
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN S/n, 23096, La Paz, B.C.S., Mexico
| | - David Point
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 Avenue Edouard Belin, 31400, Toulouse, France
| | - Edouard Kraffe
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
| | - James Ketchum
- Pelagios-Kakunja, Cuauhtémoc 155, 23096, La Paz, B.C.S., Mexico
| | - Raul Octavio Martinez Rincon
- CONACyT-Centro de Investigaciónes Biológicas Del Noroeste, S.C. (CIBNOR), Av. IPN 195, 23096, La Paz, B.C.S., Mexico
| | - Gauthier Schaal
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
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Pancaldi F, Páez-Osuna F, Marmolejo-Rodríguez AJ, Whitehead DA, González-Armas R, Soto-Jiménez MF, O'Hara T, Vazquéz-Haikin A, Galván-Magaña F. Variation of essential and non-essential trace elements in whale shark epidermis associated to two different feeding areas of the Gulf of California. Environ Sci Pollut Res Int 2021; 28:36803-36816. [PMID: 33710489 DOI: 10.1007/s11356-021-13364-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
The Gulf of California represents an important hotspot for whale shark (Rhincodon typus) aggregation. Anthropogenic activities and natural sources could expose sharks to high levels of trace elements (TEs). To determinate these levels in this endangered species, concentrations of As, Cd, Cu, Pb and Zn (in ng/g ww) were measured in 130 whale shark skin biopsies and 44 zooplankton samples collected from two areas of the Gulf of California, Bahía de Los Angeles (BLA) and Bahía de La Paz (LAP) during 2016-2018. For biopsies, Zn exhibited highest concentrations in BLA (2016-2017, 298 ± 406; 2017-2018, 1959 ± 2545) and at LAP (in 2016-2017, 595 ± 554; in 2017-2018, 2642 ± 1261). On the other hand, Cd (BLA 2016-2017, 3 ± 3; LAP 2016-2017, 4 ± 3; BLA 2017-2018, 17 ± 14; LAP 2017-2018, 13 ± 10) and Pb (BLA 2016-2017, 7 ± 7; LAP 2016-2017, 15 ± 32; BLA 2017-2018, 69 ± 76; LAP 2017-2018, 7 ± 5) showed lowest concentrations. Significant differences in TE concentrations between sites and periods occurred. Arsenic found in shark biopsies from La Paz suggested enrichment and/or increased bioavailability in this area. Sex alone was not a significant factor in TE concentration; nevertheless, a sex-dependent difference in correlation of TE concentration and size was noted (negative in males, positive in females). This indicates feeding strategies of whale shark may be sex and size segregated. During 2017-2018, zooplankton and sharks showed enrichment in all TEs. Essential elements were not biomagnified by sharks. Lead was biomagnified through zooplankton. Strong positive correlation between selected elements indicates that Zn, Cd and Pb follow the same metabolic route in the sharks' body.
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Affiliation(s)
- Francesca Pancaldi
- Instituto Politécnico Nacional. Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, 23096, La Paz, BCS, Mexico
| | - Federico Páez-Osuna
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, 82040, Mazatlán, Sinaloa, Mexico
- Miembro de El Colegio de Sinaloa, Antonio Rosales 435 Poniente, Culiacán, Sinaloa, Mexico
| | | | | | - Rogelio González-Armas
- Instituto Politécnico Nacional. Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, 23096, La Paz, BCS, Mexico
| | - Martin Federico Soto-Jiménez
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, 82040, Mazatlán, Sinaloa, Mexico
| | - Todd O'Hara
- Veterinary Integrative Biosciences, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Abraham Vazquéz-Haikin
- Asociación de pesca deportiva y ecoturismo de Bahía de Los Ángeles, Domicilio conocido, 22980, Bahía de Los Ángeles, Baja California, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional. Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, 23096, La Paz, BCS, Mexico.
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31
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Baró-Camarasa I, Marmolejo-Rodríguez AJ, O'Hara TM, Elorriaga-Verplancken FR, Trejo-Ramírez A, Martínez-Rincón RO, Galván-Magaña F. Isotopic (δ 15 N) relationship of pregnant females and their embryos: Comparing placental and yolk-sac viviparous elasmobranchs. J Fish Biol 2021; 98:784-790. [PMID: 33230841 DOI: 10.1111/jfb.14625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/11/2020] [Accepted: 11/21/2020] [Indexed: 06/11/2023]
Abstract
Nitrogen stable isotopes ratios (δ15 N) were determined for selected tissues (muscle, liver, blood and yolk) of pregnant females and their embryos of a placental viviparous species, the Pacific sharpnose shark (Rhizoprionodon longurio), and a yolk-sac viviparous species, the speckled guitarfish (Pseudobatos glaucostigmus). The R. longurio embryo tissues were 15 N enriched compared to the same tissues in the pregnant female, using the difference in δ15 N (Δδ15 N) between embryo and adult. Mean Δδ15 N was 2.17‰ in muscle, 4.39‰ in liver and 0.80‰ in blood. For P. glaucostigmus, embryo liver tissue was significantly 15 N enriched in comparison with liver of the pregnant female (Δδ15 N mean = 1.22‰), whereas embryo muscle was 15 N depleted relative to the muscle of the pregnant female (Δδ15 N mean = -1.22‰). Both species presented a significant positive linear relationship between Δδ15 N and embryo total length (LT ). The results indicated that embryos have different Δδ15 N depending on their reproductive strategy, tissue type analysed and embryo LT .
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Affiliation(s)
- Isis Baró-Camarasa
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | | | - Todd M O'Hara
- Bilingual Laboratory of Toxicology, Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | | | | | | | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
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32
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Soto-López K, Ochoa-Báez RI, Galván-Magaña F, Oddone MC. Reproductive biology of the Rasptail skate Rostroraja velezi (Rajiformes: Rajidae). J Fish Biol 2021; 98:791-802. [PMID: 33251588 DOI: 10.1111/jfb.14627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 11/08/2020] [Accepted: 11/21/2020] [Indexed: 06/12/2023]
Abstract
The Rasptail skate Rostroraja velezi is commercially exploited in artisanal elasmobranch fisheries along the west coast of Baja California Sur, Mexico, but information on its life history is limited. This study aimed to investigate the reproductive biology of R. velezi. A total of 105 specimens were caught from April 2008 to May 2012, including the largest reported specimen with 121 cm total length, 96 cm disc width (DW ). Females attained larger sizes than males. Males and females presented functional gonads. There was an asymmetry in the testes of males, with the left testis being larger. Histological analysis of the reproductive biology of R. velezi was performed here for the first time. The presence of sperm storage in females and spermatogenic development beginning at the first stages of maturity in males was recorded. It was possible to identify the development of secretions in the club, baffle and terminal zone of the oviducal gland. DW at maturity, defined as the DW at which 50% of the population is mature, was estimated at 68-72 cm for females and 65.1 cm for males. Egg-bearing females caught in April and May presented one egg capsule per uterus. Furthermore, a description of the egg capsule of R. velezi is provided. Elucidating the reproductive cycle, the type of reproductive strategies, and the fecundity of R. velezi will allow us to understand the impact of fisheries on this species.
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Affiliation(s)
- Katherin Soto-López
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Rosa Isabel Ochoa-Báez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Maria Cristina Oddone
- Instituto de Ciências Biológicas, Sector Morfologia, Universidade Federal de Rio Grande, Rio Grande, Brazil
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33
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Murillo-Cisneros DA, Zenteno-Savín T, Harley J, Cyr A, Hernández-Almaraz P, Gaxiola-Robles R, Galván-Magaña F, O'Hara TM. Mercury concentrations in Baja California Sur fish: Dietary exposure assessment. Chemosphere 2021; 267:129233. [PMID: 33359982 PMCID: PMC7851631 DOI: 10.1016/j.chemosphere.2020.129233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/25/2020] [Accepted: 12/03/2020] [Indexed: 05/06/2023]
Abstract
Total mercury concentrations ([THg]) in muscle were determined in commercial finfish and elasmobranchs from Baja California Sur (BCS), Mexico to evaluate dietary Hg exposure for BCS communities, including the relationship of trophic ecology, length and mass with [THg] that might drive future consumption advice (e.g., recommend limited consumption of large fish for some species). The [THg] ranged from 0.06 to 528.02 μg kg-1 ww in finfish and 17.68-848.26 μg kg-1 ww in elasmobranchs. Relative to the consumption threshold set for predatory fish in Mexico, all species had a concentration below 1000 μg kg-1 ww. As expected, 16 (4.02%) and 75 (18.84%) individual fish were above advisory thresholds of 500 and 200 μg kg-1 ww, respectively. The hazard quotients (HQs) in most species were significantly <1.0, only banded guitarfish showed a significant median HQ > 1.0. Thus, the relative level of risk of high Hg exposure is low for most species.
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Affiliation(s)
- Daniela A Murillo-Cisneros
- Centro de Investigaciones Biológicas Del Noroeste, S.C. Planeación Ambiental y Conservación. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, Baja California Sur, C.P. 23096, Mexico
| | - Tania Zenteno-Savín
- Centro de Investigaciones Biológicas Del Noroeste, S.C. Planeación Ambiental y Conservación. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, Baja California Sur, C.P. 23096, Mexico.
| | - John Harley
- Alaska Coastal Rainforest Center, University of Alaska Southeast, 11175 Auke Lake Way, Juneau, AK, 99801, USA
| | - Andrew Cyr
- Biomedical Learning and Student Training, University of Alaska Fairbanks, 2141 Koyukuk Dr., Fairbanks, AK, 99775, USA
| | - Pablo Hernández-Almaraz
- Centro de Investigaciones Biológicas Del Noroeste, S.C. Planeación Ambiental y Conservación. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, Baja California Sur, C.P. 23096, Mexico
| | - Ramón Gaxiola-Robles
- Centro de Investigaciones Biológicas Del Noroeste, S.C. Planeación Ambiental y Conservación. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, Baja California Sur, C.P. 23096, Mexico; Hospital General de Zona No.1. Instituto Mexicano Del Seguro Social. 5 de Febrero y Héroes de La Independencia, Centro, La Paz, Baja California Sur, C.P. 23000, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. I.P.N. S/n, Colonia Playa Palo de Santa Rita, Apartado Postal 592, La Paz, Baja California Sur, C.P. 23000, Mexico
| | - Todd M O'Hara
- Bilingual Laboratory of Toxicology, Veterinary Integrative Biosciences, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
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Juaristi-Videgaray D, Hernández-Herrera A, Galván-Magaña F, Ochoa-Báez RI, Villalejo-Fuerte MT, Bejarano-Álvarez OM. Reproductive parameters of the shovelnose guitarfish Pseudobatos productus (Ayres, 1856) in Northwest Mexico. The European Zoological Journal 2021. [DOI: 10.1080/24750263.2021.1873432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- D. Juaristi-Videgaray
- Instituto Politécnico Nacional, Centro Interdisciplinario De Ciencias Marinas, La Paz, Baja California Sur, México
| | - A. Hernández-Herrera
- Instituto Politécnico Nacional, Centro Interdisciplinario De Ciencias Marinas, La Paz, Baja California Sur, México
| | - F. Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario De Ciencias Marinas, La Paz, Baja California Sur, México
| | - R. I. Ochoa-Báez
- Instituto Politécnico Nacional, Centro Interdisciplinario De Ciencias Marinas, La Paz, Baja California Sur, México
| | - M. T. Villalejo-Fuerte
- Instituto Politécnico Nacional, Centro Interdisciplinario De Ciencias Marinas, La Paz, Baja California Sur, México
| | - O. M. Bejarano-Álvarez
- Instituto Politécnico Nacional, Centro Interdisciplinario De Ciencias Marinas, La Paz, Baja California Sur, México
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35
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Bevacqua L, Reinero FR, Becerril-García EE, Elorriaga-Verplancken FR, Juaristi-Videgaray D, Micarelli P, Galván-Magaña F, Curiel-Godoy P, Giglio G, Tripepi S, Barca D, Sperone E. Trace elements and isotopes analyses on historical samples of white sharks from the Mediterranean Sea. The European Zoological Journal 2021. [DOI: 10.1080/24750263.2020.1853265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- L. Bevacqua
- Università della Calabria, Rende (CS), Italy
| | - F. R. Reinero
- Università della Calabria, Rende (CS), Italy
- Centro Studi Squali-Sharks Studies Center, Massa Marittima (GR), Italy
| | - E. E. Becerril-García
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz (BCS), Mexico
| | | | - D. Juaristi-Videgaray
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz (BCS), Mexico
| | - P. Micarelli
- Centro Studi Squali-Sharks Studies Center, Massa Marittima (GR), Italy
| | - F. Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz (BCS), Mexico
| | - P. Curiel-Godoy
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz (BCS), Mexico
| | - G. Giglio
- Università della Calabria, Rende (CS), Italy
| | - S. Tripepi
- Università della Calabria, Rende (CS), Italy
| | - D. Barca
- Università della Calabria, Rende (CS), Italy
| | - E. Sperone
- Università della Calabria, Rende (CS), Italy
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36
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Le Croizier G, Lorrain A, Sonke JE, Hoyos-Padilla EM, Galván-Magaña F, Santana-Morales O, Aquino-Baleytó M, Becerril-García EE, Muntaner-López G, Ketchum J, Block B, Carlisle A, Jorgensen SJ, Besnard L, Jung A, Schaal G, Point D. The Twilight Zone as a Major Foraging Habitat and Mercury Source for the Great White Shark. Environ Sci Technol 2020; 54:15872-15882. [PMID: 33238094 DOI: 10.1021/acs.est.0c05621] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The twilight zone contains the largest biomass of the world's ocean. Identifying its role in the trophic supply and contaminant exposure of marine megafauna constitutes a critical challenge in the context of global change. The white shark (Carcharodon carcharias) is a threatened species with some of the highest concentrations of neurotoxin methylmercury (MeHg) among marine top predators. Large white sharks migrate seasonally from coastal habitats, where they primarily forage on pinnipeds, to oceanic offshore habitats. Tagging studies suggest that while offshore, white sharks may forage at depth on mesopelagic species, yet no biochemical evidence exists. Here, we used mercury isotopic composition to assess the dietary origin of MeHg contamination in white sharks from the Northeast Pacific Ocean. We estimated that a minimum of 72% of the MeHg accumulated by white sharks originates from the consumption of mesopelagic prey, while a maximum of 25% derives from pinnipeds. In addition to highlighting the potential of mercury isotopes to decipher the complex ecological cycle of marine predators, our study provides evidence that the twilight zone constitutes a crucial foraging habitat for these large predators, which had been suspected for over a decade. Climate change is predicted to expand the production of mesopelagic MeHg and modify the mesopelagic biomass globally. Considering the pivotal role of the twilight zone is therefore essential to better predict both MeHg exposure and trophic supply to white sharks, and effectively protect these key vulnerable predators.
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Affiliation(s)
- Gaël Le Croizier
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 avenue Edouard Belin, 31400 Toulouse, France
| | - Anne Lorrain
- Univ Brest, CNRS, Ifremer, LEMAR, 29280 Plouzané, France
| | - Jeroen E Sonke
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 avenue Edouard Belin, 31400 Toulouse, France
| | - E Mauricio Hoyos-Padilla
- Pelagios-Kakunjá A.C., Sinaloa 1540, Col. Las Garzas, 23070 La Paz, Baja California Sur, México
- Fins Attached: Marine Research and Conservation, 19675 Still Glen Drive, Colorado Springs, Colorado 80908, United States
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n., 23096 La Paz, Baja California Sur, México
| | | | - Marc Aquino-Baleytó
- Pelagios-Kakunjá A.C., Sinaloa 1540, Col. Las Garzas, 23070 La Paz, Baja California Sur, México
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n., 23096 La Paz, Baja California Sur, México
| | - Edgar E Becerril-García
- Pelagios-Kakunjá A.C., Sinaloa 1540, Col. Las Garzas, 23070 La Paz, Baja California Sur, México
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n., 23096 La Paz, Baja California Sur, México
| | - Gádor Muntaner-López
- Pelagios-Kakunjá A.C., Sinaloa 1540, Col. Las Garzas, 23070 La Paz, Baja California Sur, México
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n., 23096 La Paz, Baja California Sur, México
| | - James Ketchum
- Pelagios-Kakunjá A.C., Sinaloa 1540, Col. Las Garzas, 23070 La Paz, Baja California Sur, México
| | - Barbara Block
- Hopkins Marine Station, Stanford University, Pacific Grove, California 93950, United States
| | - Aaron Carlisle
- School of Marine Science and Policy, University of Delaware, Lewes, Delaware 19958, United States
| | - Salvador J Jorgensen
- Institute of Marine Sciences, University of California, Santa Cruz, Santa Cruz, California 95064, United States
| | - Lucien Besnard
- Univ Brest, CNRS, Ifremer, LEMAR, 29280 Plouzané, France
| | - Armelle Jung
- Des Requins et Des Hommes (DRDH), BLP/Technopole Brest-Iroise, 15 rue Dumont d'Urville, Plouzané 29860, France
| | | | - David Point
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 avenue Edouard Belin, 31400 Toulouse, France
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Becerril-García EE, Hoyos-Padilla EM, Santana-Morales O, Gutiérrez-Ortiz MA, Ayala-Bocos A, Galván-Magaña F. An estimate of the number of white sharks Carcharodon carcharias interacting with ecotourism in Guadalupe Island. J Fish Biol 2020; 97:1861-1864. [PMID: 32920886 DOI: 10.1111/jfb.14540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 08/11/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
The aim of the present study is to provide an estimate of the number of white sharks Carcharodon carcharias that seasonally interact with ecotourism boats in Guadalupe Island using Schnabel's mark-recapture method and 6316 records of white sharks during 2012-2014. The results of the estimation highlight an abundance of 78 white sharks 95% C.I. (62.1, 105.6) interacting with ecotourism. The regulations regarding the number of tourists, boats and the monitoring of white sharks should be assessed to improve management decisions regarding the conservation and sustainable use of this threatened species.
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Affiliation(s)
- Edgar E Becerril-García
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
- Pelagios Kakunjá A.C., La Paz, Mexico
| | - Edgar M Hoyos-Padilla
- Pelagios Kakunjá A.C., La Paz, Mexico
- Fins Attached, Marine Research and Conservation, Colorado Springs, Colorado, USA
| | - Omar Santana-Morales
- Facultad de Ciencias Marinas, Universidad Autónoma de Baja California, Ensenada, Mexico
- Ecología Cielo Mar y Tierra A.C., Ensenada, Mexico
| | | | | | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
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Becerril-García EE, Arellano-Martínez M, Bernot-Simon D, Hoyos-Padilla EM, Galván-Magaña F, Godard-Codding C. Steroid hormones and chondrichthyan reproduction: physiological functions, scientific research, and implications for conservation. PeerJ 2020. [DOI: 10.7717/peerj.9686] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The study of the reproductive aspects of chondrichthyans through the analysis of steroid hormones has been carried out for more than five decades in several species around the world. This scientific knowledge constitutes the basis of the reproductive endocrinology of chondrichthyans, which has provided information regarding their sexual maturation, gametogenesis, mating seasons, gestation periods, and parturition. The present review summarises the existing literature on steroid hormones in chondrichthyan reproduction and identifies future research directions addressing critical knowledge gaps in the reproductive physiology of this taxon. A total of 59 peer reviewed scientific papers from 1963 to 2020 were reviewed and the following parameters analysed: species, steroid hormones, biological matrix, field sampling (year, location), and methodology (assays, sample size, precision, and recoveries). We provided a summary of the methods, biological matrices, and the functions of up to 19 hormones on the biology of 34 species of chondrichthyans that have been analysed to date. The majority of the studies used radioimmunoassay as the main methodology (76.3%; n = 45/49); while the most frequent biological matrix used was plasma (69.5%; n = 41/49). A Kernel’s heat map was generated to present the scientific effort according to geographic location and evidenced a lack of research in high biodiversity areas for chondrichthyans worldwide. The implications of the study of steroid hormones for the conservation of chondrichthyans are discussed, as only 2.9% of the species of this group have been analysed and most of the scientific effort (93.2%; n = 55/59 papers) has focused on the analysis of less than six hormones.
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Affiliation(s)
| | | | - Daniela Bernot-Simon
- Departamento Académico de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, La Paz, Mexico
| | | | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
| | - Céline Godard-Codding
- The Institute of Environmental and Human Health, Texas Tech University, Lubbock, TX, USA
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Becerril-García EE, Hoyos-Padilla EM, Micarelli P, Galván-Magaña F, Sperone E. Behavioural responses of white sharks to specific baits during cage diving ecotourism. Sci Rep 2020; 10:11152. [PMID: 32636493 PMCID: PMC7340792 DOI: 10.1038/s41598-020-67947-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 06/17/2020] [Indexed: 01/05/2023] Open
Abstract
This study describes the effect of different baits on the attraction, surface behaviour and conditioning of white sharks Carcharodon carcharias during local ecotourism activities. The sightings, behaviours, and pictures used for photographic identification were obtained during August to November 2012-2014 onboard tourist boats in Guadalupe Island, Mexico. Four types of baits were used: (1) frozen bait; (2) frozen bait and natural chum; (3) fresh fish bait; and (4) mackerel bags. Data were analysed according to sex, maturity and the total of sharks using 6,145 sightings of 121 white sharks. The type of bait showed no significant difference on the effectiveness to attracting sharks. Ethological analysis showed that the type of bait had a significant effect on the shark's surface behaviour during its interactions with boats. Natural chum and fresh baits showed short term behavioural patterns constituted by increased number of violent interactions with the bait, while the frozen bait did not generate a defined behavioural pattern. Conditioning of white sharks was determined by the number of interactions and the consumption frequency of the bait. Fifty nine percent of sharks (n = 41) showed no conditioning, 36% (n = 25) showed a low risk and only 5% (n = 3) were found to have a high risk of conditioning. The results suggest that current ecotourism has no effect on the conditioning of the white sharks, and that all baits have a similar effectiveness for attracting the sharks. However, a different behavioural pattern was observed when fresh bait and chum were used, which could increase the potential of accidents during ecotourism.
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Affiliation(s)
- Edgar E Becerril-García
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, 23096, La Paz, Mexico
- Pelagios Kakunjá A.C., 23060, La Paz, Mexico
| | - Edgar M Hoyos-Padilla
- Pelagios Kakunjá A.C., 23060, La Paz, Mexico.
- Fins Attached Marine Research and Conservation, Colorado Springs, 80908, USA.
| | | | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, 23096, La Paz, Mexico
| | - Emilio Sperone
- Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036, Rende, Italy
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Lara A, Galván-Magaña F, Elorriaga-Verplancken F, Marmolejo-Rodríguez AJ, Gonzalez-Armas R, Arreola-Mendoza L, Sujitha SB, Jonathan MP. Bioaccumulation and trophic transfer of potentially toxic elements in the pelagic thresher shark Alopias pelagicus in Baja California Sur, Mexico. Mar Pollut Bull 2020; 156:111192. [PMID: 32365003 DOI: 10.1016/j.marpolbul.2020.111192] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/23/2020] [Accepted: 04/16/2020] [Indexed: 06/11/2023]
Abstract
Pelagic thresher shark (Alopias pelagicus) is a circumglobal species with high ecological and economic importance. Concentrations of mercury, selenium and cadmium in the muscle and liver tissues of A. pelagicus captured from Baja California Sur, Mexico were determined for assessing the potential human hazard. Results revealed that the average concentrations of Hg (0.76 mg kg-1) and Cd (0.18 mg kg-1) in muscle tissues were below the maximum permissible limits for human consumption. Se in the muscles were relatively low (mean: 0.30 mg kg-1 -1) resulting in a molar excess of Hg over Se. Average levels of hepatic Cd were extremely higher than the maximum limit for consumption. Organotropism of Hg was muscle > liver, whereas Se and Cd presented an order of liver > muscle. Biomagnification Factor (BMF) emphasized the trophic transfer of elements. Selenium Health Benefit value was negative (-3.76) posing potential health risks demanding regular monitoring for health risks.
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Affiliation(s)
- Ariagna Lara
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Fernando Elorriaga-Verplancken
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Ana Judith Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Rogelio Gonzalez-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Laura Arreola-Mendoza
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P.07340 Ciudad de México, Mexico.
| | - S B Sujitha
- Instituto Politécnico Nacional, Centro Mexicano para la Producción más Limpia (CMP+L), Av. Acueducto s/n, Col. Barrio la Laguna Ticomán, Gustavo A. Madero, C.P. 07340 Ciudad de México, Mexico
| | - M P Jonathan
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P.07340 Ciudad de México, Mexico
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Ketchum JT, Hoyos-Padilla M, Aldana-Moreno A, Ayres K, Galván-Magaña F, Hearn A, Lara-Lizardi F, Muntaner-López G, Grau M, Trejo-Ramírez A, Whitehead DA, Klimley AP. Shark movement patterns in the Mexican Pacific: A conservation and management perspective. Adv Mar Biol 2020; 85:1-37. [PMID: 32456839 DOI: 10.1016/bs.amb.2020.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Marine animal tracking has become one of the major tools used to understand the behavior and ecology of a multitude of species in the ocean, thus there is an increasing body of knowledge about this subject worldwide, particularly for sharks. Nevertheless, little was known of the movement patterns of shark in the Mexican Pacific (MXP) and Gulf of California (GOC), except for the pioneering work carried out in the 1980s on the movements of scalloped hammerhead sharks in El Bajo Espiritu Santo and other islands in the region, as well as ongoing studies on white shark movements, migratory patterns and behavior off Isla Guadalupe. Here we present an overview of previous studies on the movements of sharks, as well as a comprehensive description of new studies currently being carried out by our research group at Pelagios Kakunjá on several species of sharks in the MXP. We show how information gleaned from these studies can be put to use to guide sustainable exploitation policies and promote effective conservation practices.
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Affiliation(s)
- James T Ketchum
- Pelagios Kakunjá, La Paz, Baja California Sur, Mexico; Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, Baja California Sur, Mexico; MigraMar, Olema, CA, United States.
| | - Mauricio Hoyos-Padilla
- Pelagios Kakunjá, La Paz, Baja California Sur, Mexico; MigraMar, Olema, CA, United States
| | - Alejandro Aldana-Moreno
- Pelagios Kakunjá, La Paz, Baja California Sur, Mexico; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Kathryn Ayres
- Pelagios Kakunjá, La Paz, Baja California Sur, Mexico; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Alex Hearn
- Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador; MigraMar, Olema, CA, United States
| | - Frida Lara-Lizardi
- Pelagios Kakunjá, La Paz, Baja California Sur, Mexico; MigraMar, Olema, CA, United States
| | - Gador Muntaner-López
- Pelagios Kakunjá, La Paz, Baja California Sur, Mexico; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Miquel Grau
- Pelagios Kakunjá, La Paz, Baja California Sur, Mexico
| | | | - Darren A Whitehead
- Pelagios Kakunjá, La Paz, Baja California Sur, Mexico; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - A Peter Klimley
- Biotelemetry Consultants, Petaluma, CA, United States; MigraMar, Olema, CA, United States
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Sosa-Nishizaki O, Galván-Magaña F, Larson SE, Lowry D. Conclusions: Do we eat them or watch them, or both? Challenges for conservation of sharks in Mexico and the NEP. Adv Mar Biol 2020; 85:93-102. [PMID: 32456842 DOI: 10.1016/bs.amb.2020.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mexico is a country that makes heavy use of the shark populations that inhabit the southern portion of the Northeast Pacific Ocean (NEP). Shark meat has become an essential food source in this country, while shark fins are used to supply traditional Asian markets. In addition to consumptive utilization, charismatic shark species support an ecotourism industry that has gained significance in several tourist resorts across the country. In this concluding chapter, we recap the contents of chapters included in volumes 83 and 85 in the Advances in Marine Biology series. The chapters in these volumes address biodiversity, conservation genetics, trophic ecology, migratory movements, fisheries, and shark ecotourism, allowing us to understand the state of knowledge relevant to human: shark interactions in the Mexican Pacific. We discuss the challenges for the sustainable use and conservation of sharks in the southern NEP and highlight the need for a more holistic management approach that includes economic and social factors. To meet these challenges, we recommend updating the Mexican National Plan of Action for Sharks published in, 2004, such that it may continue serving as a roadmap for the conservation and management of sharks in the southern NEP during the years to come.
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Affiliation(s)
- Oscar Sosa-Nishizaki
- Departamento de Oceanografía Biológica, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California, México.
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Shawn E Larson
- Seattle Aquarium, Department of Conservation Programs and Partnerships, Seattle, WA, United States
| | - Dayv Lowry
- Washington Department of Fish and Wildlife, Fish Management Division, Marine Fish Science Unit, Olympia, WA, United States
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Ordiano-Flores A, Galván-Magaña F, Sánchez-González A, Páez-Osuna F. Evidence for Interrupted Biomagnification of Cadmium in Billfish Food Chain Based on Stable Carbon and Nitrogen Isotopes from Southwestern of Gulf of California. Biol Trace Elem Res 2020; 195:215-225. [PMID: 31332707 DOI: 10.1007/s12011-019-01832-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 07/11/2019] [Indexed: 11/26/2022]
Abstract
We report cadmium (Cd) concentrations in muscle, liver, and blood of striped marlin (Kajikia audax) and blue marlin (Makaira nigricans), caught in the southwest of the Gulf of California. The average Cd concentration was higher in the liver followed by blood and muscle in descending order. This pattern of Cd concentration may be related to the differences in the physiological function of these tissues. In K. audax, the Cd concentration in muscle and liver increased proportionally with body size, but only in animals that have reached the body size corresponding to first sexual maturity (animals exceeding 155 cm of postorbital length). Interspecific differences in dietary composition and Cd content evidenced that food preferences have a significant effect on the bioaccumulation of Cd. No evidence of Cd biomagnification (progressive bioaccumulation of an element along the food web) was found, as the correlation between logarithmic Cd concentrations and δ15N values was not significant when both billfish and their prey items were included in the calculations. Furthermore, the calculated biotransference factor (transfer of an element from food to consumer) suggested that Cd transference is interrupted from prey to marlins.
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Affiliation(s)
- Alfredo Ordiano-Flores
- Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000, C.P. 04510, Coyoacán, Ciudad de México, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN S/N Col. Playa de Santa Rita, C.P. 23096, La Paz, Baja California Sur, Mexico.
| | - Alberto Sánchez-González
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN S/N Col. Playa de Santa Rita, C.P. 23096, La Paz, Baja California Sur, Mexico
| | - Federico Páez-Osuna
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, C.P. 82000, Mazatlán, Sinaloa, Mexico
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Rodríguez-Gutiérrez J, Galván-Magaña F, Jacobo-Estrada T, Arreola-Mendoza L, Sujitha SB, Jonathan MP. Mercury-selenium concentrations in silky sharks (Carcharhinus falciformis) and their toxicological concerns in the southern Mexican Pacific. Mar Pollut Bull 2020; 153:111011. [PMID: 32275557 DOI: 10.1016/j.marpolbul.2020.111011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 02/10/2020] [Accepted: 02/19/2020] [Indexed: 06/11/2023]
Abstract
Mercury- Selenium concentrations were determined in 136 samples of Carcharhinus falciformis (Silky shark) sampled from the Chiapas coast, Gulf of Tehuantepec, Mexico during August 2014 - January 2015. Average Hg concentrations in neonates and juveniles (all values in μg g-1 w.w.) were found to be 0.115 and 0.129 respectively, below the maximum permissible limit of 1 μg g-1 set by the Mexican government. However, excess Se values (all values in μg g-1 d.w.) observed in neonates (5.366) and juveniles (2.815) prove to maintain antioxidant ability by inducing Hg excretion and reducing its toxicity. Calculated Biomagnification Factor (BMFTL) denoted high values for the prey C.hippurus, signifying absolute magnification of Hg and Se along the food chain. This study provides key toxicological evidences of Hg- Se interaction and their effects in marine systems and human health.
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Affiliation(s)
- Juanita Rodríguez-Gutiérrez
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, 23096 La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, 23096 La Paz, Baja California Sur, Mexico
| | - Tania Jacobo-Estrada
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, 07340 Ciudad de México, Mexico
| | - Laura Arreola-Mendoza
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, 07340 Ciudad de México, Mexico.
| | - S B Sujitha
- Instituto Politécnico Nacional (IPN), Centro Mexicano para la Producción más Limpia (CMP+L), Av. Acueducto s/n, Col. Barrio la Laguna Ticomán, Gustavo A. Madero, 07340 Ciudad de México, Mexico
| | - M P Jonathan
- Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, 07340 Ciudad de México, Mexico
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Whitehead DA, Jakes-Cota U, Pancaldi F, Galván-Magaña F, Gonzalez-Armas R. The influence of zooplankton communities on the feeding behavior of whale shark in Bahia de La Paz, Gulf of California. REV MEX BIODIVERS 2020. [DOI: 10.22201/ib.20078706e.2020.91.3054] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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46
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Palm HW, Morales-Ávila JR, Galván-Magaña F, Haseli M. A new genus and two new species of trypanorhynch cestodes (Tentaculariidae) from the sharksCarcharhinus sorrah(Müller & Henle) andSphyrna lewini(Griffith & Smith) from off the coasts of Malaysia and Mexico. Syst Parasitol 2020; 97:133-142. [PMID: 32065375 DOI: 10.1007/s11230-020-09904-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 01/12/2020] [Indexed: 11/29/2022]
Abstract
Two new tentaculariid species were found infecting carcharhiniform sharks from off the coasts of Malaysian Borneo and the southwestern coast of the Baja California Sur, Mexico. Both new species exhibit a homeoacanthous heteromorphous basal and a homeoacanthous homeomorphous metabasal armature. Since this hook arrangement is unique within the tentaculariids and the taxonomy in this group deeply depends on the tentacular armature, Reimeriella n. g. is erected to accommodate R. varioacantha n. sp. ex Carcharhinus sorrah (Müller & Henle) and R. mexicoensis n. sp. ex Sphyrna lewini (Griffith & Smith). Unlike R. mexicoensis n. sp., R. varioacantha n. sp. has a pars bothrialis not overlapping the pars bulbosa and the number of testes is higher. Reimeriella mexicoensis n. sp. possesses very large uncinate to falcate hooks in the basal armature, while in R. varioacantha n. sp. these hooks are almost the same in size as the remaining hooks in both the basal and metabasal armature. The latter species is the first tentaculariid species where the metabasal armature very closely resembles an eutetrarhynchid with a heteroacanthous typical homeomorphous metabasal armature and a high number of spiniform hooks per half spiral row (10-11 vs 6-7 in R. mexicoensis n. sp.) in the metabasal and apical armature. This pattern provides further morphological evidence for the close relationship of the Eutetrarhynchoidea and the Tentacularioidea. Reimeriella varioacantha n. sp. enriches the trypanorhynch fauna from off the coast of Malaysian Borneo while R. mexicoensis n. sp. is a novel record of a tentaculariid trypanorhynch from the Mexican Pacific.
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Affiliation(s)
- Harry W Palm
- Aquaculture and Sea-Ranching, Faculty of Agricultural and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, 18059, Rostock, Germany
| | - José Raúl Morales-Ávila
- Fishery Quality Control Centre, Ministry of Fisheries Wealth, P.O. Box 427, 100 Al Bustan, Masqat, Oman.,Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Ave. IPN s/n, Col. Playa Palo de Santa Rita, A.P. 592, C.P. 23096, La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Ave. IPN s/n, Col. Playa Palo de Santa Rita, A.P. 592, C.P. 23096, La Paz, Baja California Sur, Mexico
| | - Mohammad Haseli
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran.
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Aldana-Moreno A, Hoyos-Padilla EM, González-Armas R, Galván-Magaña F, Hearn A, Klimley AP, Winram W, Becerril-García EE, Ketchum JT. Residency and diel movement patterns of the endangered scalloped hammerhead Sphyrna lewini in the Revillagigedo National Park. J Fish Biol 2020; 96:543-548. [PMID: 31858589 DOI: 10.1111/jfb.14239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 12/12/2019] [Indexed: 06/10/2023]
Abstract
This study is the first description of the residency and diel movements of Sphyrna lewini at the Revillagigedo National Park, Mexico. Eleven adult scalloped hammerheads of total length 200-300 cm were monitored using acoustic telemetry during 2013-2015 at four sites at San Benedicto Island. Diel and residency patterns were described based on 58,055 detections by four autonomous receivers. The sharks displayed high daytime residency in two of the four sites, with movements away into the pelagic environment at night. This study generates a baseline for effective monitoring to improve the conservation and management of an iconic but endangered species at this marine reserve.
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Affiliation(s)
- Alejandro Aldana-Moreno
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
- Pelagios Kakunjá A.C, La Paz, Baja California Sur, Mexico
| | - E Mauricio Hoyos-Padilla
- Pelagios Kakunjá A.C, La Paz, Baja California Sur, Mexico
- Fins Attached, Colorado Springs, Colorado, USA
- MigraMar, Olema, California, USA
| | - Rogelio González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Alex Hearn
- MigraMar, Olema, California, USA
- Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador
| | - A Peter Klimley
- MigraMar, Olema, California, USA
- Biotelemetry Consultants, Petaluma, California, USA
| | | | - Edgar Eduardo Becerril-García
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
- Pelagios Kakunjá A.C, La Paz, Baja California Sur, Mexico
| | - James T Ketchum
- Pelagios Kakunjá A.C, La Paz, Baja California Sur, Mexico
- MigraMar, Olema, California, USA
- Centro de Investigaciones Biológicas del Noroeste, La Paz, Baja California Sur, Mexico
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48
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Pantoja-Echevarría LM, Marmolejo-Rodríguez AJ, Galván-Magaña F, Arreola-Mendoza L, Tripp-Valdéz A, Verplancken FE, Sujitha SB, Jonathan MP. Bioaccumulation and trophic transfer of Cd in commercially sought brown smoothhound Mustelus henlei in the western coast of Baja California Sur, Mexico. Mar Pollut Bull 2020; 151:110879. [PMID: 32056655 DOI: 10.1016/j.marpolbul.2019.110879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 12/28/2019] [Accepted: 12/31/2019] [Indexed: 06/10/2023]
Abstract
A study on cadmium concentration in Mustelus henlei (liver and muscle) was carried out in an area influenced by natural phosphorite deposits and coastal upwelling. Our results indicate that liver (0.96 μg/g) concentrations were higher compared to the muscle (0.040 μg/g) suggesting it is on the safer level for human consumption. The male/female ratio indicates higher values (based on liver & muscle) in males (0.899 μg/g), which contributes to these differences in concentration. Higher values in the liver (0.96 μg/g) is due to the influence of phosphorite deposits in the region as well as the high metabolic activity. The other important factor responsible for these high Cd values are the prey, which also poses high values and is well supported by the biomagnification (1.08 & 4.57) of this element. The study also benefited in evaluating the environmental conditions for this particular species and elemental concentration in relation to human health.
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Affiliation(s)
- Laura María Pantoja-Echevarría
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Ana Judith Marmolejo-Rodríguez
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Felipe Galván-Magaña
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Laura Arreola-Mendoza
- Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y, Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P.07340 Ciudad de México, Mexico.
| | - Arturo Tripp-Valdéz
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Fernando Elorriaga Verplancken
- Centro Interdisciplinario de Ciencias Marinas (CICIMAR), Instituto Politécnico Nacional (IPN), Avenida IPN, s/n Colonia Playa Palo de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - S B Sujitha
- Centro Mexicano para la Producción más Limpia (CMP+L), Instituto Politécnico Nacional (IPN), Av. Acueducto s/n, Col. Barrio la Laguna Ticomán, Gustavo A. Madero, C.P. 07340 Ciudad de México, Mexico
| | - M P Jonathan
- Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y, Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, C.P.07340 Ciudad de México, Mexico
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Tamburin E, Amador-Capitanachi MJ, Galván-Magaña F, Norris TA, Elorriaga-Verplancken FR. Isotopic variation in blood components based on their biochemistry and physiology: A comparison between sharks and fur seals. J Exp Zool A Ecol Integr Physiol 2019; 333:104-110. [PMID: 31709773 DOI: 10.1002/jez.2330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 09/08/2019] [Accepted: 10/11/2019] [Indexed: 11/07/2022]
Abstract
Research using stable isotopes analysis (SIA) of carbon (δ13 C) and nitrogen (δ15 N) in blood components is lacking, because of the challenge of sample collection, processing, and storage in remote areas. There also is a paucity of information regarding the effect of tissue biochemical composition on isotopic ratios with few comparisons among taxa. We collected blood samples from shortfin mako sharks (n = 70; 2016) and Guadalupe fur seals (n = 25; 2017). All samples were centrifuged to obtain plasma from sharks and serum from the Guadalupe fur seals, and all the samples were prepared for SIA and analyzed using a Costech 4010 elemental analyzer interfaced with a Delta V Plus isotope ratio mass spectrometer. We found significant differences between plasma δ13 C values of shortfin mako sharks (-17.6 ± 0.9‰) and serum of Guadalupe fur seals (-20.3 ± 1.2‰), but we did not find any differences for δ15 N values between the two species. The differences in δ13 C values between species are probably due to the specific blood composition and to the different biochemical characteristics and different adaptations within taxa. These findings highlight the importance of further research on the influence of biochemistry features on isotopic results, in this way a more accurate assessment will be possible for this factor, separating it from the dietary influences on stable isotopic values.
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Affiliation(s)
- Elena Tamburin
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, México.,Fundación Alium Pacific, Carrera 26 No. 5C-13, Cali, Colombia
| | | | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, México
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Pancaldi F, Páez-Osuna F, Soto-Jiménez MF, González-Armas R, O'Hara T, Marmolejo-Rodríguez AJ, Vázquez A, Galván-Magaña F. Trace Elements in Tissues of Whale Sharks (Rhincodon typus) Stranded in the Gulf of California, Mexico. Bull Environ Contam Toxicol 2019; 103:515-520. [PMID: 31143976 DOI: 10.1007/s00128-019-02640-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 05/25/2019] [Indexed: 06/09/2023]
Abstract
Concentration of essential (Se, Zn and Cu) and non-essential (As, Cd, Hg and Pb) trace elements were measured in selected tissues of two dead whale sharks (Rhincodon typus) stranded in the Gulf of California (GC) in 2017 and 2018. Concentrations of Cd and Pb in the skeletal muscle of the whale shark from La Paz Bay, GC were higher compared to a previous study on whale shark from China. The shark from La Paz Bay also presented higher concentration of Pb in the epidermis, compared to the same tissue of the other whale shark stranded in Punta Bufeo, GC. The Hg in all analysed tissues was lower than those documented in carnivorous sharks. Molar ratio Se:Hg shows an excess of Se over Hg in all the tissues sampled in both sharks.
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Affiliation(s)
- F Pancaldi
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, BCS, 23096, Mexico
| | - F Páez-Osuna
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar Y Limnología, Universidad Nacional Autónoma de México (UNAM), Mazatlán, Sinaloa, Mexico
| | - M F Soto-Jiménez
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar Y Limnología, Universidad Nacional Autónoma de México (UNAM), Mazatlán, Sinaloa, Mexico
| | - R González-Armas
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, BCS, 23096, Mexico
| | - T O'Hara
- Department of Veterinary Medicine, University of Alaska, Fairbanks, Fairbanks, AK, 99775-7000, USA
| | - A J Marmolejo-Rodríguez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, BCS, 23096, Mexico
| | - A Vázquez
- Asociación de Pesca Deportiva Y Ecoturismo de Bahía de Los Ángeles, Domicilio Conocido, Bahía de Los Ángeles, Baja California, 22980, Mexico
| | - F Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n, La Paz, BCS, 23096, Mexico.
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