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Díaz-Delgado E, Girolametti F, Annibaldi A, Trueman CN, Willis TJ. Mercury bioaccumulation and its relationship with trophic biomarkers in a Mediterranean elasmobranch mesopredator. MARINE POLLUTION BULLETIN 2024; 201:116218. [PMID: 38531207 DOI: 10.1016/j.marpolbul.2024.116218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/28/2024]
Abstract
Human activity has led to increased concentrations of mercury (Hg) in the world's oceans. Mercury can bioaccumulate and biomagnify in animal tissues via trophic transfer, thus, becoming most pronounced in larger and older predators. Here, we measured Hg concentrations and their relationship with stable isotopes-based proxies of trophic level (δ13C and δ15N values) in multiple tissues of Mustelus spp. from the Mediterranean Sea. We found higher Hg concentrations in muscle than in liver and fin tissues. The relationship between Hg concentrations and δ15N values in muscle suggested repeated foraging for low trophic level and Hg-poor prey, and biomagnification of Hg at higher trophic levels. Seasonal variations in δ13C values could indicate shifts in primary production sources and/or in local prey availability. The HBVSe index suggested no risk to human health, however the safe meal limit recommendations are 4.5 and 2.2 portions per month for adults and children, respectively.
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Affiliation(s)
- Eric Díaz-Delgado
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Fano Marine Center, Viale Adriatico 1/N, 61032 Fano, Italy.
| | - Federico Girolametti
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Anna Annibaldi
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Clive N Trueman
- Ocean and Earth Science, University of Southampton, Southampton SO143ZH, UK
| | - Trevor J Willis
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Fano Marine Center, Viale Adriatico 1/N, 61032 Fano, Italy
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2
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Encerrado-Manriquez AM, Pouv AK, Fine JD, Nicklisch SCT. Enhancing knowledge of chemical exposures and fate in honey bee hives: Insights from colony structure and interactions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170193. [PMID: 38278225 DOI: 10.1016/j.scitotenv.2024.170193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/13/2024] [Accepted: 01/13/2024] [Indexed: 01/28/2024]
Abstract
Honey bees are unintentionally exposed to a wide range of chemicals through various routes in their natural environment, yet research on the cumulative effects of multi-chemical and sublethal exposures on important caste members, including the queen bee and brood, is still in its infancy. The hive's social structure and food-sharing (trophallaxis) practices are important aspects to consider when identifying primary and secondary exposure pathways for residential hive members and possible chemical reservoirs within the colony. Secondary exposures may also occur through chemical transfer (maternal offloading) to the brood and by contact through possible chemical diffusion from wax cells to all hive members. The lack of research on peer-to-peer exposures to contaminants and their metabolites may be in part due to the limitations in sensitive analytical techniques for monitoring chemical fate and dispersion. Combined application of automated honey bee monitoring and modern chemical trace analysis techniques could offer rapid progress in quantifying chemical transfer and accumulation within the hive environment and developing effective mitigation strategies for toxic chemical co-exposures. To enhance the understanding of chemical fate and toxicity within the entire colony, it is crucial to consider both the intricate interactions among hive members and the potential synergistic effects arising from combinations of chemical and their metabolites.
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Affiliation(s)
| | - Amara K Pouv
- Department of Environmental Toxicology, University of California-Davis, Davis, CA 95616, USA; Department of Fisheries, Animal, and Veterinary Science, University of Rhode Island, Kingston, RI 02881, USA
| | - Julia D Fine
- Invasive Species and Pollinator Health Research Unit, USDA-ARS, 3026 Bee Biology Rd., Davis, CA 95616, USA
| | - Sascha C T Nicklisch
- Department of Environmental Toxicology, University of California-Davis, Davis, CA 95616, USA.
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3
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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. THE SCIENCE OF THE TOTAL ENVIRONMENT 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] [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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4
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Páez-Osuna F, Bergés-Tiznado ME, Valencia-Castañeda G, Fregoso-López MG, León-Cañedo JA, Fierro-Sañudo JF, Ramírez-Rochín J. Mercury and selenium in three fish species from a dam 20 months after a mine-tailing spill in the SE Gulf of California ecoregion, Mexico. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:5399-5414. [PMID: 38117398 PMCID: PMC10799130 DOI: 10.1007/s11356-023-31487-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 12/07/2023] [Indexed: 12/21/2023]
Abstract
During January 2013, a mining spill occurred in the Santa Maria mining region, releasing around 300,000 m3 of tailings on Los Remedios river, which was transported through the San Lorenzo river and finally to El Comedero (EC) dam. Twenty months later, we examined the concentrations of Hg and Se in the muscle, liver, gills, and guts of three fish species (Cyprinus carpio, Oreochromis aureus, Micropterus salmoides) captured in the EC dam to assess the performance of the cleaning operations. A high Se concentration in the liver of all species (carp, 1.2 ± 0.4; tilapia, 3.9 ± 2.1; bass, 3.5 ± 1.1 µg g-1 ww) was consistently observed, while this behavior was only found in the blue tilapia for Hg (0.15 ± 0.11 µg g-1 ww). Tilapia (benthic-detritivorous) exhibited the highest Se concentrations compared to the carp (omnivore) and the largemouth bass (piscivore). In contrast, the largemouth bass had the highest Hg levels in the muscle compared with the other fishes. Such differences could be related to the different metabolism and feeding habits among species. Compared to a tilapia study carried out three months after the mine spill during a mortality event, a decrease was evident in the liver for Se and Hg by 7.2 and 4.7 times, respectively. This reveals that cleaning operations were more efficient for Se and less for Hg, and that a prolonged period was required for the partial recovery of the element levels in fish from sites impacted by mining. Considering the Mexican consumption scenarios for each fish species, it could be concluded that there will be no non-cancer risk by exposure to Hg or Se.
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Affiliation(s)
- Federico Páez-Osuna
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, 82000, Mazatlán, Sinaloa, Mexico.
- Miembro de El Colegio de Sinaloa, Antonio Rosales 435 Poniente, Culiacán, Sinaloa, Mexico.
| | - Magdalena E Bergés-Tiznado
- Unidad Académica de Ingeniería en Tecnología Ambiental, Universidad Politécnica de Sinaloa, Carretera Municipal Libre Mazatlán-Higueras Km. 3, C.P. 82199, Mazatlán, Sinaloa, Mexico
| | - Gladys Valencia-Castañeda
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, 82000, Mazatlán, Sinaloa, Mexico
| | - Marcela G Fregoso-López
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, 82000, Mazatlán, Sinaloa, Mexico
- Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000, 04510, Coyoacán, Ciudad de Mexico, Mexico
| | - Jesús A León-Cañedo
- Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000, 04510, Coyoacán, Ciudad de Mexico, Mexico
- Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen S/N Col. Centro, 82000, Mazatlán, Sinaloa, Mexico
| | - Juan F Fierro-Sañudo
- Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000, 04510, Coyoacán, Ciudad de Mexico, Mexico
- Universidades del Bienestar Benito Juárez García, Buaysiacobe, Etchojoa, Sonora, Mexico
| | - Javier Ramírez-Rochín
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, 82000, Mazatlán, Sinaloa, Mexico
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5
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Crawford LM, Gelsleichter J, Newton AL, Hoopes LA, Lee CS, Fisher NS, Adams DH, Giraudo M, McElroy AE. Associations between total mercury, trace minerals, and blood health markers in Northwest Atlantic white sharks (Carcharodon carcharias). MARINE POLLUTION BULLETIN 2023; 195:115533. [PMID: 37734227 DOI: 10.1016/j.marpolbul.2023.115533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/05/2023] [Accepted: 09/08/2023] [Indexed: 09/23/2023]
Abstract
The ecology and life-histories of white sharks make this species susceptible to mercury bioaccumulation; however, the health consequences of mercury exposure are understudied. We measured muscle and plasma total mercury (THg), health markers, and trace minerals in Northwest Atlantic white sharks. THg in muscle tissue averaged 10.0 mg/kg dry weight, while THg in blood plasma averaged 533 μg/L. THg levels in plasma and muscle were positively correlated with shark precaudal length (153-419 cm), and THg was bioaccumulated proportionally in muscle and plasma. Nine sharks had selenium:mercury molar ratios in blood plasma >1.0, indicating that for certain individuals the potential protective effects of the trace mineral were diminished, whereas excess selenium may have protected other individuals. No relationships between plasma THg and any trace minerals or health markers were identified. Thus, we found no evidence of negative effects of Hg bioaccumulation, even in sharks with very high THg.
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Affiliation(s)
- Lisa M Crawford
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA.
| | | | - Alisa L Newton
- OCEARCH, Park City, UT 84060, USA; ZooQuatic Laboratory, LLC, Baltimore, MD 21202, USA
| | - Lisa A Hoopes
- Department of Research and Conservation, Georgia Aquarium, Atlanta, GA 30313, USA
| | - Cheng-Shiuan Lee
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA; Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
| | - Nicholas S Fisher
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA
| | | | - Maeva Giraudo
- Laboratoire de Biodiversité et Biotechnologie Microbienne, Sorbonne Université, CNRS, 66650 Banyuls-sur-Mer, France
| | - Anne E McElroy
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA
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6
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Gayford JH, Whitehead DA. The biology and ecology of the Pacific sharpnose shark Rhizoprionodon longurio. Ecol Evol 2023; 13:e10600. [PMID: 37829178 PMCID: PMC10565905 DOI: 10.1002/ece3.10600] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/04/2023] [Accepted: 09/20/2023] [Indexed: 10/14/2023] Open
Abstract
Amidst global declines in elasmobranch populations resulting predominantly from overfishing, the need to gather data regarding shark ecology is greater than ever. Many species remain data deficient or at risk of going extinct before sufficient conservation measures can be applied. In this review, we summarise existing knowledge regarding the biology and ecology of the Pacific sharpnose shark Rhizoprionodon longurio (Jordan & Hilbert, 1882), a small-bodied carcharhinid shark found in coastal waters of the Eastern Tropical Pacific Ocean that is of both commercial and ecological importance. We compare ecological parameters of this species with its closest extant relatives and identify major knowledge gaps and avenues for future research. In particular, additional studies investigating the behavioural and sensory ecology, as well as potential migratory patterns of the species are needed. Such studies will not only improve our understanding of R. longurio, but provide insight into the extent to which the numerous studies performed on a close relative-Rhizoprionodon terraenovae-provide an accurate representation of the biology and ecology of Rhizoprionodon and carcharhinids more generally.
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Affiliation(s)
- Joel H. Gayford
- Department of Life SciencesSilwood Park Campus, Imperial College LondonLondonUK
- Shark MeasurementsLondonUK
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7
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Li Z, Pethybridge HR, Wu F, Li Y. Mercury bioaccumulation in thresher sharks from the eastern tropical Pacific: Influences of body size, maturation stage, and feeding habitat. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 872:162248. [PMID: 36804976 DOI: 10.1016/j.scitotenv.2023.162248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Sharks, as top order predators, provide a guidance on how contaminants such as mercury bioaccumulate in marine environments. This study assessed the bioaccumulation of mercury (total mercury, THg) in the muscle, liver, red blood cells (RBC), and plasma of pelagic and bigeye thresher sharks (Alopias pelagicus and A. superciliosus) from eastern tropical Pacific. Additionally, the concentration of methylmercury (MeHg) in muscle was also determined to assess risks for human consumption. For both species, muscle THg concentrations (4.05 ± 2.15 and 4.12 ± 1.84 μg g-1 dry weight for pelagic and bigeye thresher shark) were higher than that in other tissues. THg concentrations for all tissues were significantly correlated with precaudal length, with higher accumulation rates after maturity in pelagic than bigeye thresher sharks, suggesting an associated dietary shift at maturation. Correlations among tissues in both species suggested similar transportation and distribution patterns in internal tissues. The δ13C values in muscle, RBC and plasma suggested that habitat shifts influenced Hg accumulation, whereas trophic position, estimated by δ15N values, had limited effects on patterns of Hg bioaccumulation. Diet shifts towards prey more cephalopods that content higher Hg than small fishes (large fishes: 1.77 μg g-1; cephalopods: 0.66 μg g-1 and small fishes 0.48 μg g-1, dry weight) increased Hg accumulation rates in adult pelagic thresher sharks. Concentrations of MeHg in the muscle of both thresher shark (3.42 ± 1.68 μg g-1 in A. pelagicus and 3.78 ± 2.13 μg g-1 in A. superciliosus) exceeded the recommended levels for human consumption. This research provides insight into the factors influencing mercury bioaccumulation in thresher sharks, which are essential for the management and conservation of these species.
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Affiliation(s)
- Zezheng Li
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Heidi R Pethybridge
- Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organization, Hobart, Tasmania, Australia
| | - Feng Wu
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai, China; National Engineering Research Centre for Oceanic Fisheries, Shanghai Ocean University, Shanghai, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai, China.
| | - Yunkai Li
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai, China; National Engineering Research Centre for Oceanic Fisheries, Shanghai Ocean University, Shanghai, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai, China.
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8
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Fuentes SN, Díaz Andrade MC, Awruch CA, Moya AC, Arias AH. Impacts of water pollutants on chondrichthyans species from South America: A review. CHEMOSPHERE 2023; 324:138262. [PMID: 36870615 DOI: 10.1016/j.chemosphere.2023.138262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/18/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
This is the first research that extensively compiles all the available scientific literature on the presence of trace metals (TMs), persistent organic pollutants (POPs), and plastic debris in Chondrichthyan species inhabiting South America (including the Atlantic and Pacific Oceans), providing an insight into Chondrichthyans as bioindicators of pollutants as well as the impacts of pollutant exposure on the organisms. Seventy-three studies were published in South America between 1986 and 2022. While 68.5% focused on TMs, 17.8% on POPs, and 9.6% on plastic debris. Brazil and Argentina were at the top in terms of the number of publications; however, there is an absence of information regarding pollutants for Chondrichthyans in Venezuela, Guyana, and French Guiana. Of the 65 Chondrichthyan species reported, 98.5% belong to the Elasmobranch group, and 1.5% from the Holocephalans. Most studies focused on Chondrichthyans of economic importance, and the most analyzed organs were the muscle and liver. There is a lack of studies on Chondrichthyan species with low economic value and critical conservation status. Due to their ecological relevance, distribution, accessibility, high trophic position, capacity to accumulate high levels of pollutants, and the number of studies published, Prionace glauca and Mustelus schmitii seem to be adequate to serve as bioindicators. For TMs, POPs, and plastic debris there is a lack of studies focusing on the pollutant levels as well as their effect on Chondrichthyans. Future research reporting TMs, POPs, and plastic debris occurrences in Chondrichthyan species are required in order to increase the scarce databases about pollutants in this group, with a clear need for further research on the responses of chondrichthyans to pollutants, as well as making inferences about the potential risks to the ecosystems and human health.
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Affiliation(s)
- Sabrina N Fuentes
- Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR - CONICET/UNS), San Juan 671, 8000, Bahía Blanca, Argentina.
| | - M Constanza Díaz Andrade
- Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR - CONICET/UNS), San Juan 671, 8000, Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia (DBByF, UNS), San Juan 670, 8000, Bahía Blanca, Argentina
| | - Cynthia A Awruch
- Centro Para el Estudio de Sistemas Marinos (CESIMAR - CENPAT- CONICET), Bv. Almirante Brown 2915 U9120ACD, Puerto Madryn, Argentina; School of Natural Sciences and Institute for Marine and Antarctic Studies (IMAS), College of Sciences and Engineering, University of Tasmania, Hobart, Tasmania, Australia.
| | - Ana C Moya
- Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR - CONICET/UNS), San Juan 671, 8000, Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia (DBByF, UNS), San Juan 670, 8000, Bahía Blanca, Argentina
| | - Andrés H Arias
- Departamento de Química, Área III, Universidad Nacional del Sur, Av Alem 1253, 8000, Bahía Blanca, Argentina; Instituto Argentino de Oceanografía (IADO - CONICET/UNS), Camino La Carrindanga km 7.5, 8000, Bahía Blanca, Argentina
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9
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Corrêa B, Paiva LG, Santos-Neto E, Vidal LG, Azevedo-Silva CE, Vianna M, Lailson-Brito JL. Organochlorine contaminants in Rio skate (Rioraja agassizii), an endangered batoid species, from southeastern coast of Brazil. MARINE POLLUTION BULLETIN 2022; 182:114002. [PMID: 35939933 DOI: 10.1016/j.marpolbul.2022.114002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 07/21/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
A global movement towards decreases in elasmobranch overfishing has been noted in the last decades. However, discussion concerning the effects of POP contamination on the health and survival of these organisms is still recent. These compounds can affect the immune and endocrine systems of both sharks and batoids, impairing reproduction and impacting species recruitment, acting synergistically alongside overfishing effects. In this context, this study investigated the concentration of organochlorine compounds in liver of 29 individuals of Rioraja agassizii, a commercially exploited skate classified as Vulnerable by IUCN and as Endangered in Brazil. Contaminant concentrations were higher in adults compared to juveniles. Distinct contamination profiles were observed, suggesting different groups within the investigated population and revealing contaminants as a potential tool to assess population ecology. PCB levels were considered a concern as they resemble concentrations in ecosystems from the northern hemisphere, where deleterious effects on elasmobranchs have been observed.
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Affiliation(s)
- Beatriz Corrêa
- Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil; Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil.
| | - Larissa G Paiva
- Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil; Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Elitieri Santos-Neto
- Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Lara G Vidal
- Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Cláudio E Azevedo-Silva
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Marcelo Vianna
- Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil; IMAM-AquaRio - Rio de Janeiro Aquarium Research Center, Rio de Janeiro, Brazil
| | - José L Lailson-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
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10
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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. MARINE POLLUTION BULLETIN 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] [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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11
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Cai X, Chen H, Huang B, Lu J. Analysis on advances and characteristics of microplastic pollution in China's lake ecosystems. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 232:113254. [PMID: 35104781 DOI: 10.1016/j.ecoenv.2022.113254] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/13/2022] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
China is the largest producer and consumer of plastics worldwide. Microplastic (MP) pollution has been a recent research hotspot in environmental science and ecology. This study collects and analyzes the statistical data for microplastics (MPs) 86 lakes in entire China's lake ecosystems in past five years (2016-2020), their range in area is 0.056-4543.000 km2 (average: 566.045 km2), and the water storage varies from 0.162 × 108 to 1050.000 × 108 m3 (average: 77.884 ×108 m3). The results showed (1) The MP abundance in lake surface water is significantly correlated with lake area (ρ = -0.562, p <0.01), provincial GDP (Gross Domestic Product, GDP) (ρ = 0.377, p = 0.002), GDP per capita (ρ = 0.346, p = 0.006), urban waste water discharge and ratio of agricultural land area (ρ = 0.369, p = 0.003). (2) The MP abundance in lake sediment is significantly correlated with per capita domestic volume of garbage disposal (ρ = -0.536, p <0.001), per capita urban waste water discharge (ρ = -0.544, p <0.001) and ratio of agricultural land area (ρ = 0.635, p <0.001). (3) Irrespective of whether the samples were from surface water or sediment, MPs were primarily transparent, and the dominant types were fragments, films, and fibers. In addition, the size of MPs samples was mostly less than 2 mm, and the major polymers were polyethylene (PE), polypropylene (PP), and polystyrene (PS). (4) The degree of MP pollution in organisms was related to the degree of environmental pollution. These findings could provide a theoretical basis for the control and management of MP pollution in China's lake ecosystems.
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Affiliation(s)
- Xinyi Cai
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Huili Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China.
| | - Bei Huang
- Marine Ecological Environmental Monitoring Center of Zhejiang Province, Zhoushan 316021, China
| | - Jianbo Lu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China.
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12
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Martins MF, Costa PG, Bianchini A. Assessing multigenerational exposure to metals in elasmobranchs: Maternal transfer of contaminants in a yolk-sac viviparous species. MARINE POLLUTION BULLETIN 2022; 175:113364. [PMID: 35093781 DOI: 10.1016/j.marpolbul.2022.113364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/13/2022] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
This study aimed to assess the maternal offloading of metals in the Brazilian guitarfishPseudobatos horkelii through determining essential (Cr, Cu, Fe) and non-essential (Cd, Hg, Pb) metal concentrations along two generations of this species: pregnant females and offspring. The maximum transfer capacity (ECER) and offspring/mother ratio were calculated to estimate the extent of offloading, as well as the proportion of contaminants presented in offspring related to the maternal concentrations. Transfer efficiency was element-dependent. Chromium had the highest ECER (99.7%), followed by Hg (67.7%). Other essential metals were less transferred (9.6-35.6%) and Cd and Pb were not detected in uterine content samples. The relationships between maternal length and concentration, as well as transfer capacity were not significant, indicating that females might be continuously exposed, and that offloading might not excrete metals efficiently. On the other hand, embryos are exposed to these elements which could impair embryonic development.
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Affiliation(s)
- Mariana F Martins
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8, 96203-900, Rio Grande, Brazil.
| | - Patrícia G Costa
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8, 96203-900, Rio Grande, Brazil
| | - Adalto Bianchini
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8, 96203-900, Rio Grande, Brazil
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13
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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. THE SCIENCE OF THE TOTAL ENVIRONMENT 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] [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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14
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Renaguli A, Fernando S, Holsen TM, Hopke PK, Adams DH, Balazs GH, Jones TT, Work TM, Lynch JM, Crimmins BS. Characterization of Halogenated Organic Compounds in Pelagic Sharks and Sea Turtles Using a Nontargeted Approach. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16390-16401. [PMID: 34846854 DOI: 10.1021/acs.est.1c03798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Halogenated organic compounds (HOCs) in marine species collected from the Atlantic Ocean [3 shortfin mako (Isurus oxyrinchus) and 1 porbeagle (Lamna nasus)], and 12 sea turtles collected from the Pacific Ocean [3 loggerhead (Caretta caretta), 3 green (Chelonia mydas), 3 olive ridley (Lepidochelys olivacea), and 3 hawksbill (Eretmochelys imbricata)] were analyzed with a nontargeted analytical method using two-dimensional gas chromatography coupled to high-resolution time-of-flight mass spectrometry. Sharks and sea turtles had distinct HOC profiles. Halogenated methoxyphenols (halo-MeOPs) were the most abundant compound class identified in sea turtle livers, while polychlorinated biphenyls (PCBs) were the most abundant in shark livers. In addition to legacy contaminants and halo-MeOPs, a total of 110 nontargeted/novel HOCs (NHOCs) were observed in the shark livers. Shortfin mako collected from the northern Gulf of Mexico contained the largest number (89) and most diverse structural classes of NHOCs. Among all NHOCs, a group of compounds with the elemental composition C14H12-nCln (n = 5-8) exhibited the highest concentrations, followed by chlorocarbazoles and tris(chlorophenyl) methanes (TCPMs). Using nontargeted workflows, a variety of known and unknown HOCs were observed, which demonstrate the need to develop more complete chemical profiles in the marine environment.
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Affiliation(s)
- Aikebaier Renaguli
- Institute for a Sustainable Environment, Clarkson University, 8 Clarkson Avenue, Potsdam, New York 13699, United States
| | - Sujan Fernando
- Center for Air and Aquatic Resources Engineering and Science, Clarkson University, 8 Clarkson Avenue, Potsdam, New York 13699, United States
| | - Thomas M Holsen
- Center for Air and Aquatic Resources Engineering and Science, Clarkson University, 8 Clarkson Avenue, Potsdam, New York 13699, United States
- Department of Civil and Environmental Engineering, Clarkson University, 8 Clarkson Avenue, Potsdam, New York 13699, United States
| | - Philip K Hopke
- Center for Air and Aquatic Resources Engineering and Science, Clarkson University, 8 Clarkson Avenue, Potsdam, New York 13699, United States
| | - Douglas H Adams
- Cape Canaveral Scientific Inc., 220 Surf Road, Melbourne Beach, Florida 32951, United States
| | - George H Balazs
- Golden Honu Services of Oceania, Honolulu, Hawaii 96825 United States
| | - T Todd Jones
- Golden Honu Services of Oceania, Honolulu, Hawaii 96825 United States
| | - Thierry M Work
- U.S. Geological Survey, National Wildlife Health Center, Honolulu Field Station, Honolulu, Hawaii 96818, United States
| | - Jennifer M Lynch
- National Institute of Standards and Technology, Chemical Sciences Division, 41-202 Kalaniana'ole Highway Ste #9, Waima̅nalo, Hawai'i 96795, United States
- Center for Marine Debris Research, Hawai'i Pacific University, 41-202 Kalaniana'ole Highway Ste #9, Waima̅nalo, Hawai'i 96795, United States
| | - Bernard S Crimmins
- Department of Civil and Environmental Engineering, Clarkson University, 8 Clarkson Avenue, Potsdam, New York 13699, United States
- AEACS, LLC, New Kensington, Pennsylvania 15068, United States
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15
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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. MARINE POLLUTION BULLETIN 2021; 170:112609. [PMID: 34157537 DOI: 10.1016/j.marpolbul.2021.112609] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [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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16
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Reistad NA, Norris SB, Rumbold DG. Mercury in neonatal and juvenile blacktip sharks (Carcharhinus limbatus). Part I: exposure assessment. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:187-197. [PMID: 33415661 DOI: 10.1007/s10646-020-02322-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/21/2020] [Indexed: 06/12/2023]
Abstract
Elasmobranchs are exposed to mercury (Hg) through a variety of pathways in the environment. This study assessed maternal offloading and diet-based Hg exposure for neonatal and juvenile blacktip sharks (Carcharhinus limbatus) from Charlotte Harbor located along southwest Florida's coast, a recognized Hg hotspot. Neonates (n = 57) had highest total Hg (THg) concentrations in the kidney (0.56 ± 0.26 mg kg-1; n = 38) and muscle (0.53 ± 0.17 mg kg-1; n = 57), followed by liver (0.31 ± 0.11 mg kg-1; n = 38), and blood (0.05 ± 0.033 mg kg-1; n = 57). Juveniles (n = 13) exhibited a different distribution with highest THg in the liver (0.868 ± 0.54 mg kg-1; n = 6), followed by the muscle (0.84 ± 0.28 mg kg-1; n = 13), kidney (0.55 ± 0.22 mg kg-1; n = 6), and blood (0.11 ± 0.04 mg kg-1; n = 11). The distribution of THg among tissues and liver-to-muscle ratios indicated that Hg originated primarily from maternal offloading in neonates, whereas juveniles continued to accumulate Hg through dietary exposure post-parturition. Additionally, comparisons between results of the present study and previous Florida blacktip shark surveys suggested that Hg levels have not declined in southwest Florida estuaries for over two decades.
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Affiliation(s)
- Nicole A Reistad
- Florida Gulf Coast University, 10501 FGCU Blvd. South., Fort Myers, FL, 33965, USA.
| | - Sarah B Norris
- Florida Gulf Coast University, 10501 FGCU Blvd. South., Fort Myers, FL, 33965, USA
| | - Darren G Rumbold
- Florida Gulf Coast University, 10501 FGCU Blvd. South., Fort Myers, FL, 33965, USA
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17
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Norris SB, Reistad NA, Rumbold DG. Mercury in neonatal and juvenile blacktip sharks (Carcharhinus limbatus). Part II: Effects assessment. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:311-322. [PMID: 33447940 DOI: 10.1007/s10646-020-02325-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
As apex predators, blacktip sharks (Carcharhinus limbatus) are highly susceptible to biomagnified mercury (Hg) particularly in the Gulf of Mexico (GOM), which is known to contain fishes and invertebrates with elevated Hg levels. Blacktip sharks occur in the GOM year-round and are heavily fished both commercially and recreationally, but little is known about how Hg affects the species. In this study, blood, muscle, liver, and kidney samples were collected from neonatal (n = 57) and juvenile (n = 13) blacktip sharks in Charlotte Harbor, Florida. Hg concentrations in neonates and juveniles were found to be elevated in muscle (mean ± SE = 0.59 ± 0.23 mg kg-1), liver (0.39 ± 0.29 mg kg-1), kidney (0.56 ± 0.25 mg kg-1), and blood (0.059 ± 0.041 mg kg-1) compared to other local shark species and conspecifics from other areas. Blood plasma chemistry, hematology, and liver histology were evaluated to assess the relationship between Hg and tissue damage. Plasma chemistry parameters alanine aminotransferase (ALT) and phosphorus (PHOS) were not correlated with tissue Hg or liver condition index. Hematological effects were also not correlated with tissue Hg. However, melanomacrophage presence and lipid deposition, evaluated as part of histopathological analysis, were found to exhibit a statistically significant association with concentrations of Hg in tissue and ALT levels. These results suggest that Hg exposure potentially had a negative effect on the livers of the blacktip sharks evaluated in the present study.
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Affiliation(s)
- Sarah B Norris
- Florida Gulf Coast University, 10501 FGCU Blvd South, Fort Myers, FL, 33965, USA.
| | - Nicole A Reistad
- Florida Gulf Coast University, 10501 FGCU Blvd South, Fort Myers, FL, 33965, USA
| | - Darren G Rumbold
- Florida Gulf Coast University, 10501 FGCU Blvd South, Fort Myers, FL, 33965, USA
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18
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Gelsleichter J, Sparkman G, Howey LA, Brooks EJ, Shipley ON. Elevated accumulation of the toxic metal mercury in the Critically Endangered oceanic whitetip shark Carcharhinus longimanus from the northwestern Atlantic Ocean. ENDANGER SPECIES RES 2020. [DOI: 10.3354/esr01068] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The oceanic whitetip shark Carcharhinus longimanus is a widely distributed large pelagic shark species once considered abundant in tropical and warm temperate waters, but recently listed as Critically Endangered by the IUCN due to drastic population declines associated with overfishing. In addition to risks posed to its populations due to overexploitation, oceanic whitetip sharks are also capable of accumulating elevated quantities of harmful environmental toxicants, placing them at special risk from anthropogenic pollution. Herein, we provide the first data on accumulation of the toxic, non-essential metal mercury (Hg) in northwest Atlantic (NWA) oceanic whitetip sharks, focusing on aggregations occurring at Cat Island, The Bahamas. Total Hg (THg) concentrations were measured in muscle of 26 oceanic whitetip sharks and compared with animal length and muscle δ15N to evaluate potential drivers of Hg accumulation. THg concentrations were also measured in fin and blood subcomponents (red blood cells and plasma) to determine their value as surrogates for assessing Hg burden. Muscle THg concentrations were among the highest ever reported for a shark species and correlated significantly with animal length, but not muscle δ15N. Fin, red blood cell, and plasma THg concentrations were significantly correlated with muscle THg. Fin THg content was best suited for use as a surrogate for estimating internal Hg burden because of its strong relationship with muscle THg levels, whereas blood THg levels may be better suited for characterizing recent Hg exposure. We conclude that Hg poses health risks to NWA oceanic whitetip sharks and human consumers of this species.
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Affiliation(s)
- J Gelsleichter
- University of North Florida, 1 UNF Dr, Jacksonville, FL 32224, USA
| | - G Sparkman
- University of North Florida, 1 UNF Dr, Jacksonville, FL 32224, USA
| | - LA Howey
- Johns Hopkins University, 100 International Dr., Baltimore, MD 21202, USA
- Haiti Ocean Project, #10, Dupuy 1, Petite Riviere de Nippes, Haiti
| | - EJ Brooks
- Cape Eleuthera Institute, Eleuthera, The Bahamas
| | - ON Shipley
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA
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19
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Tiktak GP, Butcher D, Lawrence PJ, Norrey J, Bradley L, Shaw K, Preziosi R, Megson D. Are concentrations of pollutants in sharks, rays and skates (Elasmobranchii) a cause for concern? A systematic review. MARINE POLLUTION BULLETIN 2020; 160:111701. [PMID: 33181965 DOI: 10.1016/j.marpolbul.2020.111701] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/18/2020] [Accepted: 09/19/2020] [Indexed: 06/11/2023]
Abstract
This review represents a comprehensive analysis on pollutants in elasmobranchs including meta-analysis on the most studied pollutants: mercury, cadmium, PCBs and DDTs, in muscle and liver tissue. Elasmobranchs are particularly vulnerable to pollutant exposure which may pose a risk to the organism as well as humans that consume elasmobranch products. The highest concentrations of pollutants were found in sharks occupying top trophic levels (Carcharhiniformes and Lamniformes). A human health risk assessment identified that children and adults consuming shark once a week are exposed to over three times more mercury than is recommended by the US EPA. This poses a risk to local fishing communities and international consumers of shark-based products, as well as those subject to the widespread mislabelling of elasmobranch products. Wider screening studies are recommended to determine the risk to elasmobranchs from emerging pollutants and more robust studies are recommended to assess the risks to human health.
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Affiliation(s)
- Guuske P Tiktak
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester M1 5GD, UK.
| | - Demi Butcher
- School of Geography, Earth and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth PL4 8AA, UK
| | - Peter J Lawrence
- Bangor University, School of Ocean Sciences, Askew St, Menai Bridge, Wales LL59 5AB, UK
| | - John Norrey
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - Lee Bradley
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - Kirsty Shaw
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - Richard Preziosi
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - David Megson
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester M1 5GD, UK
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de Souza-Araujo J, Andrades R, de Oliveira Lima M, Hussey NE, Giarrizzo T. Maternal and embryonic trace element concentrations and stable isotope fractionation in the smalleye smooth-hound (Mustelus higmani). CHEMOSPHERE 2020; 257:127183. [PMID: 32497841 DOI: 10.1016/j.chemosphere.2020.127183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/18/2020] [Accepted: 05/21/2020] [Indexed: 06/11/2023]
Abstract
Here, we evaluate maternal offloading of 16 trace elements (Essential: Co, Cr, Cu, Fe, Mn, Ni, Se and Zn; Nonessential: Al, As, Ba, Cd, Hg, Pb, Tl and U) and determine mother-offspring isotopic fractionation of δ13C and δ15N in muscle and liver tissue of four pregnant Mustelus higmani and 18 associated embryos sampled from the Amazon Coast of Brazil. Embryo muscle tissue had significantly higher concentrations of most trace elements when compared to mothers, with the exception of Hg. Embryo liver accumulated more nonessential elements than muscle (n = 7 vs. 0, respectively), while the Se:Hg molar ratio was >1 in liver and muscle of both mothers and embryos. Livers of embryos were moderately enriched in δ13C and δ15N when compared to that of their mother. Negative correlations were observed between embryo body length and δ13C and trace elements concentrations. We conclude that mothers offload a large portion of all essential elements and Al, As and Pb to their young and that the isotopic fractionation of embryos reflects maternal diet and habitat occupied, with δ13C diluted with embryonic growth. We also show that muscle and liver accumulate trace elements at different rates relative to the body length of embryos. The Se:Hg molar ratio suggests that Se could play a protective role against Hg toxicity during early stages of M. higmani embryonic development.
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Affiliation(s)
- Juliana de Souza-Araujo
- Núcleo de Ecologia Aquática e Pesca da Amazônia, Universidade Federal Do Pará, Belém, PA, Brazil.
| | - Ryan Andrades
- Núcleo de Ecologia Aquática e Pesca da Amazônia, Universidade Federal Do Pará, Belém, PA, Brazil; Laboratório de Ictiologia, Departamento de Oceanografia e Ecologia, Universidade Federal Do Espírito Santo, Vitória, ES, Brazil
| | - Marcelo de Oliveira Lima
- Laboratório de Toxicologia, Sessão de Meio Ambiente, Instituto Evandro Chagas, Ananindeua, PA, Brazil
| | - Nigel E Hussey
- Integrative Biology. University of Windsor. Windsor, Ontario, Canada
| | - Tommaso Giarrizzo
- Núcleo de Ecologia Aquática e Pesca da Amazônia, Universidade Federal Do Pará, Belém, PA, Brazil
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Garcia Barcia L, Argiro J, Babcock EA, Cai Y, Shea SKH, Chapman DD. Mercury and arsenic in processed fins from nine of the most traded shark species in the Hong Kong and China dried seafood markets: The potential health risks of shark fin soup. MARINE POLLUTION BULLETIN 2020; 157:111281. [PMID: 32469749 DOI: 10.1016/j.marpolbul.2020.111281] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 05/15/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
Shark fin is one of Asia's most valued dried seafood products, with over 80 shark species traded in Hong Kong [HK]. We analyzed processed shark fins from mainland China and HK markets (n = 267) for mercury, methyl‑mercury, and arsenic, to inform consumers, policy makers and public health officials on the health risks of ingesting fins from nine of the most common shark species in the fin trade. Fins from all species frequently exceed Hg limits established by HK authorities. Most of the mercury found is in the form of methyl‑mercury (69.0 ± 33.5%). Five species surpass methyl‑mercury PTWIs and blue shark fins can exceed inorganic arsenic BMDL0.5. Species-of-origin was a significant predictor of heavy metal concentrations, with higher mercury concentrations associated with coastal sharks and lower arsenic levels found with increasing shark trophic level. Species-specific labeling would help consumers avoid shark fin products that pose the highest health risk.
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Affiliation(s)
- Laura Garcia Barcia
- Department of Biological Sciences, Florida International University, 3000 NE 151st Street, North Miami, FL 33181, United States of America.
| | - Juana Argiro
- Department of Biological Sciences, Florida International University, 3000 NE 151st Street, North Miami, FL 33181, United States of America
| | - Elizabeth A Babcock
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149, United States of America
| | - Yong Cai
- Department of Chemistry & Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL 33199, United States of America
| | - Stanley K H Shea
- BLOOM Association, c/o, ADMCF, Suite 2405, 9 Queen's Road Central, Hong Kong
| | - Demian D Chapman
- Department of Biological Sciences, Florida International University, 3000 NE 151st Street, North Miami, FL 33181, United States of America
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22
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Le Croizier G, Lorrain A, Schaal G, Ketchum J, Hoyos-Padilla M, Besnard L, Munaron JM, Le Loc'h F, Point D. Trophic resources and mercury exposure of two silvertip shark populations in the Northeast Pacific Ocean. CHEMOSPHERE 2020; 253:126645. [PMID: 32283423 DOI: 10.1016/j.chemosphere.2020.126645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/21/2020] [Accepted: 03/27/2020] [Indexed: 06/11/2023]
Abstract
Worldwide shark populations have experienced rapid declines over the last decades, mainly due to overfishing. Marine protected areas (MPAs) have thus become an indispensable tool for the protection of these marine predators. Two recently-created MPAs in the Northeast Pacific Ocean, the Revillagigedo National Park and Clipperton Atoll, are characterized by different trophic structures potentially influencing the trophic niche and contaminant exposure of resident sharks in these two sites. In this context, we used carbon (δ13C) and nitrogen (δ15N) stable isotope analyzes as well as total mercury concentrations ([THg]) to assess the effect of foraging site on the trophic niche and Hg levels of juvenile silvertip (ST) sharks Carcharhinus albimarginatus. Analyzing fin clip samples from Revillagigedo and Clipperton, we found that shark δ15N varied spatially in relation to δ15N baselines, suggesting similar trophic position in both MPAs. Moreover, δ13C values indicated that ST sharks from Revillagigedo would feed on different food webs (i.e. both benthic and pelagic) while individuals from Clipperton would only rely on benthic food webs. These differences between MPAs led to a weak overlap of isotopic niches between the two populations, highlighting the site residency of juvenile ST sharks. Within each population, [THg] was not correlated with trophic tracers (δ15N and δ13C) and was also similar between populations. This study revealed no influence of site or food web in [THg] and raises the question of the origin of Hg exposure for reef shark populations in the Northeast Pacific Ocean.
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Affiliation(s)
- Gaël Le Croizier
- Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), UMR 5563 CNRS/IRD/Université Paul Sabatier, 14 Avenue Edouard Belin, 31400, Toulouse, France; Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France.
| | - Anne Lorrain
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Gauthier Schaal
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - James Ketchum
- Pelagios Kakunjá A.C., Sinaloa 1540, Las Garzas, 23070, La Paz, Baja California Sur, Mexico; Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, Baja California Sur, 23096, Mexico
| | - Mauricio Hoyos-Padilla
- Pelagios Kakunjá A.C., Sinaloa 1540, Las Garzas, 23070, La Paz, Baja California Sur, Mexico; Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, Baja California Sur, 23096, Mexico; Fins Attached Marine Conservation, Colorado Springs, USA
| | - Lucien Besnard
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | | | | | - David Point
- Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), UMR 5563 CNRS/IRD/Université Paul Sabatier, 14 Avenue Edouard Belin, 31400, Toulouse, France
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23
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Ehnert-Russo SL, Gelsleichter J. Mercury Accumulation and Effects in the Brain of the Atlantic Sharpnose Shark (Rhizoprionodon terraenovae). ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 78:267-283. [PMID: 31760438 DOI: 10.1007/s00244-019-00691-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Few published studies have examined whether the elevated concentrations of the nonessential toxic metal mercury (Hg) often observed in shark muscle also occur in the shark brain or whether Hg accumulation affects shark neurophysiology. Therefore, this study examined accumulation and distribution of Hg in the shark brain, as well as effects of Hg on oxidative stress in the shark central nervous system, with particular focus on the Atlantic sharpnose shark (Rhizoprionodon terraenovae). Sharks were collected along the southeastern U.S. coast throughout most of this species' U.S. geographical range. Total Hg (THg) concentrations were measured in and compared between shark muscle and brain, whereas known biomarkers of Hg-induced neurological effects, including glutathione depletion, lipid peroxidation, and concentrations of a protein marker of glial cell damage (S100b), were measured in shark cerebrospinal fluid. Brain THg concentrations were correlated with muscle THg levels but were significantly lower and did not exceed most published thresholds for neurological effects, suggesting limited potential for detrimental responses. Biomarker concentrations supported this premise, because these data were not correlated with brain THg levels. Hg speciation also was examined. Unlike muscle, methylmercury (MeHg) did not comprise a high percentage of THg in the brain, suggesting that differential uptake or loss of organic and inorganic Hg and/or demethylation of MeHg may occur in this organ. Although Hg accumulation in the shark brain generally fell below toxicity thresholds, higher THg levels were measured in the shark forebrain compared with the midbrain and hindbrain. Therefore, there is potential for selective effects on certain aspects of shark neurophysiology if brain Hg accumulation is increased.
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Affiliation(s)
- S L Ehnert-Russo
- University of North Florida, 1 UNF Dr, Jacksonville, FL, 32224, USA
| | - J Gelsleichter
- University of North Florida, 1 UNF Dr, Jacksonville, FL, 32224, USA.
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24
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Dutton J, Venuti VM. Comparison of Maternal and Embryonic Trace Element Concentrations in Common Thresher Shark (Alopias vulpinus) Muscle Tissue. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 103:380-384. [PMID: 31236632 DOI: 10.1007/s00128-019-02667-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 06/19/2019] [Indexed: 06/09/2023]
Abstract
This study compared the concentration of essential (Co, Cr, Cu, Fe, Mn, Ni, Se, Zn) and nonessential (Ag, As, Cd, Hg, Pb) trace elements in the muscle tissue of a pregnant common thresher shark (Alopias vulpinus) to the concentration in the three embryos. With the exception of Ag, Cd, Cr, and Ni which were below the detection limit, all other elements accumulated in the embryo muscle tissue. The Se:Hg molar ratios in the embryos averaged 9.8, indicating that Se may have a protective role against Hg toxicity during this early life stage. Maternal transfer as a source of trace elements in sharks should not be overlooked and future studies need to focus on how reproductive strategy influences this process.
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Affiliation(s)
- Jessica Dutton
- Environmental Studies Program, Adelphi University, Garden City, NY, 11530, USA.
- Department of Biology, Texas State University, Aquatic Station, San Marcos, TX, 78666, USA.
| | - Vittoria M Venuti
- Environmental Studies Program, Adelphi University, Garden City, NY, 11530, USA
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25
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Purba NP, Handyman DIW, Pribadi TD, Syakti AD, Pranowo WS, Harvey A, Ihsan YN. Marine debris in Indonesia: A review of research and status. MARINE POLLUTION BULLETIN 2019; 146:134-144. [PMID: 31426141 DOI: 10.1016/j.marpolbul.2019.05.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/25/2019] [Accepted: 05/25/2019] [Indexed: 05/11/2023]
Abstract
With the status as the world's top contributor of marine plastic debris, Indonesia has committed to reduce marine plastic debris up to 70% in 2025 by establishing the National Action Plan (NAP) on Marine Debris. The high amount of marine plastic debris as a result of transport and accumulation become a complex issue in Indonesia due to its ocean-atmospheric circulation, high population of coastal communities, and marine activities. Based on our findings, there are gap of publications related to marine debris in Indonesia that had been already published. Marine debris is ubiquitous and transboundary, as they were found in marine environment and transported by currents to various direction including uninhabited islands, thus, we propose more comprehensive future research about the impact of marine debris on ecosystem (e.g. biological impact of organisms in the water column, ecological alteration in distribution pattern, and invasive species), human health, and economic loss.
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Affiliation(s)
- Noir P Purba
- Marine Research Laboratory (MEAL), University of Padjadjaran, Indonesia.
| | | | - Tri D Pribadi
- Biology Department, University of Padjadjaran, Indonesia
| | - Agung D Syakti
- Marine Science and Fishery Faculty, University of Raja Ali Haji Maritime, Indonesia
| | - Widodo S Pranowo
- Marine and Coastal Data Laboratory, Ministry of Marine and Fishery Affairs, Indonesia
| | | | - Yudi N Ihsan
- Marine Research Laboratory (MEAL), University of Padjadjaran, Indonesia
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26
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Lyons K, Kacev D, Preti A, Gillett D, Dewar H. Organic contaminants as an ecological tool to explore niche partitioning: a case study using three pelagic shark species. Sci Rep 2019; 9:12080. [PMID: 31427708 PMCID: PMC6700177 DOI: 10.1038/s41598-019-48521-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 08/06/2019] [Indexed: 11/08/2022] Open
Abstract
Chemical contaminant profiles are linked to an animal's niche, providing a potential tool by which to assess resource partitioning in pelagic species. As proof of concept, we examined contaminant signatures in three species of sharks (Isurus oxyrinchus, Prionace glauca, and Alopias vulpinus) known to overlap in both space and time. Since these sharks comprise a predatory guild within the Southern California Bight (SCB), we predicted that species may partition spatial and dietary resources to limit the extent of competitive exclusion. Indeed, species were distinguishable by both total contaminant loads and their contaminant fingerprint, as random forest analysis found that species could be correctly classified 96% of the time. Our results demonstrate the utility of chemical analyses for ecological studies, and how contaminant tracers can be used in combination with traditional methods to elucidate how species may undergo niche partitioning to reduce competition for overlapping resources within predatory guilds.
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Affiliation(s)
- Kady Lyons
- Georgia Aquarium, 225 Baker Street NW, 30313, Atlanta, Georgia.
| | - Dovi Kacev
- Southwest Fisheries Science Center, La Jolla, California, USA
- Southern California Coastal Water Research Project, Costa Mesa, California, USA
| | - Antonella Preti
- Southwest Fisheries Science Center, La Jolla, California, USA
- University of California Santa Cruz, Santa Cruz, California, USA
| | - David Gillett
- Southern California Coastal Water Research Project, Costa Mesa, California, USA
| | - Heidi Dewar
- Southwest Fisheries Science Center, La Jolla, California, USA
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27
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Lyons K, Kacev D, Preti A, Gillett D, Dewar H, Kohin S. Species-Specific Characteristics Influence Contaminant Accumulation Trajectories and Signatures Across Ontogeny in Three Pelagic Shark Species. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6997-7006. [PMID: 31090417 DOI: 10.1021/acs.est.8b07355] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Factors influencing organic contaminant accumulation in sharks, especially across ontogeny, are not well-known. Contaminant concentrations were measured in three species of sharks (Blue, Shortfin Mako, and Common Thresher) across a range of size classes (neonatal to adult) that vary in their ecological and physiological characteristics. Empirical data was compared to a theoretical framework that predicted the shape of lifetime accumulation curves. We found that a one-size-fits-all accumulation model was not appropriate as species-specific characteristics had a significant effect on contaminant accumulation trajectories. Maternal offloading likely has an important effect on determining neonatal shark contaminant starting points, and trophic ecology and physiology may interact to affect the shape of species' contaminant accumulation curves. Makos were found to have the highest accumulation potential and Blues the lowest, with Threshers being intermediate in accumulation potential. Changes in species' ecology and/or physiology were also reflected in contaminant signature changes over ontogeny. If contaminant concentrations are to be used as a proxy for risk, species-specific characteristics need to be taken into account when estimating contaminant exposure and its potential negative effects on shark health and human consumption safety.
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Affiliation(s)
- Kady Lyons
- Georgia Aquarium , 225 Baker Street NW , Atlanta , Georgia 30313 , United States
| | - Dovi Kacev
- Southwest Fisheries Science Center , La Jolla , California 92037 , United States
- Southern California Coastal Water Research Project , Costa Mesa , California 92626 , United States
| | - Antonella Preti
- Southwest Fisheries Science Center , La Jolla , California 92037 , United States
- University of California Santa Cruz , Santa Cruz , California 95064 , United States
| | - David Gillett
- Southern California Coastal Water Research Project , Costa Mesa , California 92626 , United States
| | - Heidi Dewar
- Southwest Fisheries Science Center , La Jolla , California 92037 , United States
| | - Suzanne Kohin
- Southwest Fisheries Science Center , La Jolla , California 92037 , United States
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28
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Lyons K, Bigman JS, Kacev D, Mull CG, Carlisle AB, Imhoff JL, Anderson JM, Weng KC, Galloway AS, Cave E, Gunn TR, Lowe CG, Brill RW, Bedore CN. Bridging disciplines to advance elasmobranch conservation: applications of physiological ecology. CONSERVATION PHYSIOLOGY 2019; 7:coz011. [PMID: 31110763 PMCID: PMC6519003 DOI: 10.1093/conphys/coz011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/02/2019] [Accepted: 03/19/2019] [Indexed: 06/09/2023]
Abstract
A strength of physiological ecology is its incorporation of aspects of both species' ecology and physiology; this holistic approach is needed to address current and future anthropogenic stressors affecting elasmobranch fishes that range from overexploitation to the effects of climate change. For example, physiology is one of several key determinants of an organism's ecological niche (along with evolutionary constraints and ecological interactions). The fundamental role of physiology in niche determination led to the development of the field of physiological ecology. This approach considers physiological mechanisms in the context of the environment to understand mechanistic variations that beget ecological trends. Physiological ecology, as an integrative discipline, has recently experienced a resurgence with respect to conservation applications, largely in conjunction with technological advances that extended physiological work from the lab into the natural world. This is of critical importance for species such as elasmobranchs (sharks, skates and rays), which are an especially understudied and threatened group of vertebrates. In 2017, at the American Elasmobranch Society meeting in Austin, Texas, the symposium entitled `Applications of Physiological Ecology in Elasmobranch Research' provided a platform for researchers to showcase work in which ecological questions were examined through a physiological lens. Here, we highlight the research presented at this symposium, which emphasized the strength of linking physiological tools with ecological questions. We also demonstrate the applicability of using physiological ecology research as a method to approach conservation issues, and advocate for a more available framework whereby results are more easily accessible for their implementation into management practices.
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Affiliation(s)
- K Lyons
- Georgia Aquarium, Atlanta, GA, USA
| | - J S Bigman
- Simon Fraser University, Burnaby, Canada
| | - D Kacev
- Southwest Fisheries Science Center, La Jolla, CA, USA
| | - C G Mull
- Simon Fraser University, Burnaby, Canada
| | | | - J L Imhoff
- Florida State University Coastal and Marine Laboratory, St. Teresa, FL, USA
| | - J M Anderson
- University of Hawai`i at Mānoa, Honolulu, HI, USA
| | - K C Weng
- Virginia Institute of Marine Science, Gloucester Point, VA, USA
| | - A S Galloway
- South Carolina Department of Natural Resources, SC, USA
| | - E Cave
- Florida Atlantic University, Boca Raton, FL, USA
| | - T R Gunn
- Georgia Southern University, Statesboro, GA USA
| | - C G Lowe
- California State University Long Beach, Long Beach, CA, USA
| | - R W Brill
- Virginia Institute of Marine Science, Gloucester Point, VA, USA
| | - C N Bedore
- Georgia Southern University, Statesboro, GA USA
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Lyons K, Wynne-Edwards KE. Legacy environmental polychlorinated biphenyl contamination attenuates the acute stress response in a cartilaginous fish, the Round Stingray. Stress 2019; 22:395-402. [PMID: 30806133 DOI: 10.1080/10253890.2019.1570125] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
In a population of Round Stingrays (Urobatis halleri) sampled from mainland California (polychlorinated biphenyl [PCB] exposed site, n = 46), relative to a nearby offshore island (reference site, n = 34), we tested the hypothesis that stingrays from the PCB-exposed site would have a compromised stress response. Adult male and pregnant female (pregnancy = matrotrophic histotrophy), stingrays were captured via hook and line at both locations over a breeding season and plasma was sampled either immediately (Baseline, males = 10, females = 31), or after ∼5 min of struggle on the line followed by a 15 min confinement stressor (Stressed, males = 16, females = 23). Biomarkers of the primary stress response (1α-OH-corticosterone) and the secondary response (energy mobilization; glucose, glycogen, and lactate in liver and muscle) were assessed. Females from both sites demonstrated the expected primary stress response of 1α-OH-corticosterone elevation, but the contaminant-exposed males did not. PCB-exposed stingrays, regardless of sex, failed to produce a plasma glucose increase in response to the applied stress, even though the stressor increased liver glucose as expected. This suggests a dysfunction in glucose transport due to PCB exposure. The Round Stingray accumulates lower PCB loads than other, predatory elasmobranchs, and by extension, the stress axis effects could be more severely impacted in those species as well. Lay summary Legacy polychlorinated biphenyl (PCB) contamination continues to adversely affect marine life. We show that PCB-exposure interferes with the ability of pregnant female and adult male stingrays to mobilize the energy necessary to respond appropriately to an acute stress like capture. Other cartilaginous fish species, such as sharks, accumulate considerably more PCB as a result of their predatory diet, and are likely to be more adversely impacted.
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Affiliation(s)
- Kady Lyons
- a Department of Biological Sciences , University of Calgary , Calgary , Canada
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30
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Terrazas-López R, Arreola-Mendoza L, Galván-Magaña F, S B S, M P J. Understanding the antagonism of Hg and Se in two shark species from Baja California South, México. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:202-209. [PMID: 30196220 DOI: 10.1016/j.scitotenv.2018.08.261] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 08/16/2018] [Accepted: 08/20/2018] [Indexed: 06/08/2023]
Affiliation(s)
- Rafael Terrazas-López
- 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.
| | - 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
| | - Sujitha S B
- 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
| | - Jonathan M P
- 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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31
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Cagnazzi D, Consales G, Broadhurst MK, Marsili L. Bioaccumulation of organochlorine compounds in large, threatened elasmobranchs off northern New South Wales, Australia. MARINE POLLUTION BULLETIN 2019; 139:263-269. [PMID: 30686427 DOI: 10.1016/j.marpolbul.2018.12.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 12/10/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
Persistent organic pollutants (POPs) include polychlorinated biphenyls (PCBs) dichlorodiphenyltrichloroethane (DDT) and hexachlorobenzene (HCB), which are resistant to biodegradation and therefore accumulate in the marine environment. In Australia, POPs occur in high concentrations primarily in costal water near farming regions and urban centres. From contaminated sediments and biota, POPs are transferred and biomagnified in larger marine organisms. We quantified POPs concentrations in 57 individuals from ten species of sharks and rays caught in bather-protection gillnets deployed off northern New South Wales, Australia. Polychlorinated biphenyls, DDTs and HCB were detected in all species. For some individuals, concentrations were at levels known to have deleterious sub-lethal effects. Overall, the POP concentrations analysed in this study were comparable to those in similar species from more polluted regions, and may have negative impacts on longer-term health. Future research is warranted to investigate spatio-temporal patterns of species-specific contaminant loads and their implications.
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Affiliation(s)
- Daniele Cagnazzi
- Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
| | - Guia Consales
- Department of Environment, Earth and Physical Sciences, Siena University, Via Mattioli 4, 53100 Siena, Italy
| | - Matt K Broadhurst
- NSW Department of Primary Industries, Fisheries Conservation Technology Unit, National Marine Science Centre, PO Box 4321, Coffs Harbour, NSW 2450, Australia; Marine and Estuarine Ecology Unit, School of Biological Sciences, University of Queensland, St Lucia, Australia
| | - Letizia Marsili
- Department of Environment, Earth and Physical Sciences, Siena University, Via Mattioli 4, 53100 Siena, Italy
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32
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Marler H, Adams DH, Wu Y, Nielsen CK, Shen L, Reiner EJ, Chen D. Maternal Transfer of Flame Retardants in Sharks from the Western North Atlantic Ocean. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:12978-12986. [PMID: 30226756 DOI: 10.1021/acs.est.8b01613] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The present work represents a comprehensive study of in utero maternal transfer of legacy and emerging flame retardants (FRs) in marine predators. We analyzed liver tissues from pregnant sharks of five viviparous species, including blacknose shark ( Carcharhinus acronotus; n = 12), blacktip shark ( Carcharhinus limbatus; n = 2), bonnethead ( Sphyrna tiburo; n = 2), Atlantic sharpnose shark ( Rhizoprionodon terraenovae; n = 2), and spinner shark ( Carcharhinus brevipinna; n = 2), as well as their embryos ( n = 84 in total from five species), collected from the western North Atlantic Ocean. Concentrations of frequently detected emerging FRs in adult female blacknose sharks were determined to be 6.1-83.3 ng/g lipid weight (lw) for dechlorane analogues, 2.5-29.8 ng/g lw for tetrabromo- o-chlorotoluene, and nondetection -32.6 ng/g lw for hexabromobenzene. These concentrations were 1-2 orders of magnitude lower than those of legacy polybrominated diphenyl ether flame retardants (85.7-398 ng/g lw). Similar contamination profiles were also found in the other four species, although FR concentrations varied in different species. A total of 21 FRs were commonly found in developing embryos of female sharks from five species, demonstrating maternal transfer in utero. The maternal transfer ratio (i.e., ratio of the mean litter concentration to their mother's concentration) determined in blacknose shark mother/embryo groups for each FR chemical was negatively associated with its octanol-water partition coefficient. Our work lays a solid foundation for future investigation of the underlying mechanisms of in utero transfer and additional physical or chemical factors that affect maternal transfer.
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Affiliation(s)
- Hillary Marler
- Cooperative Wildlife Research Laboratory and Department of Zoology , Southern Illinois University , Carbondale , Illinois 62901 , United States
| | - Douglas H Adams
- Cape Canaveral Scientific Inc., 220 Surf Road , Melbourne Beach , Florida 32951 , United States
| | - Yan Wu
- Cooperative Wildlife Research Laboratory and Department of Zoology , Southern Illinois University , Carbondale , Illinois 62901 , United States
| | - Clayton K Nielsen
- Cooperative Wildlife Research Laboratory and Department of Forestry , Southern Illinois University , Carbondale , Illinois 62901 , United States
| | - Li Shen
- Ontario Ministry of the Environment, Conservation and Parks, Toronto , Ontario M9P 3V6 , Canada
| | - Eric J Reiner
- Ontario Ministry of the Environment, Conservation and Parks, Toronto , Ontario M9P 3V6 , Canada
| | - Da Chen
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health , Jinan University , Guangzhou , Guangdong 510632 , China
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Lyons K, Wynne-Edwards KE. Legacy polychlorinated biphenyl contamination impairs male embryonic development in an elasmobranch with matrotrophic histotrophy, the round stingray (Urobatis halleri). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:2904-2911. [PMID: 30125983 DOI: 10.1002/etc.4255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 05/19/2018] [Accepted: 08/13/2018] [Indexed: 06/08/2023]
Abstract
Anthropogenic chemical exposure can result in overall reductions in reproductive success. Using the round stingray (Urobatis halleri) as an elasmobranch model with internal gestation, we measured female fecundity and embryo growth from postovulation to near parturition to test the hypothesis that environmental polychlorinated biphenyl (PCB) contamination would impair reproductive success. Two sites were sampled from southern California, USA: the mainland site was exposed to legacy PCB contamination (with low exposure to other anthropogenic contaminants), and the offshore reference site at Catalina Island was a separate population with low anthropogenic influence. Contaminant-exposed embryos weighed less at each stage of development than reference embryos, while accumulating proportionately more liver mass over development. Furthermore, environmental contamination negatively affected male embryos more than female embryos. The present study is the first study to demonstrate a negative effect of contaminant exposure on elasmobranch embryo growth, with probable fitness costs later in life. Environ Toxicol Chem 2018;37:2904-2911. © 2018 SETAC.
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Affiliation(s)
- Kady Lyons
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
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Lyons K, Burket SR, Brooks BW. Sex may influence environmental diphenhydramine accumulation in Round Stingrays. MARINE POLLUTION BULLETIN 2018; 135:648-653. [PMID: 30301084 DOI: 10.1016/j.marpolbul.2018.07.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/15/2018] [Accepted: 07/16/2018] [Indexed: 06/08/2023]
Abstract
Despite the amount of treated wastewater discharged into the Southern California Bight, few studies have examined pharmaceutical compounds in local biota. The Round Stingray (Urobatis halleri) was selected as a representative elasmobranch species to perform an exploratory study on environmental pharmaceutical exposure. Archived liver samples of males and females from juvenile to adult size classes from several locations (n = 53) were examined for 18 pharmaceutical and illicit drug compounds using isotope-dilution LC-MS/MS. Very few compounds were detected in stingray livers, with diphenhydramine as the only pharmaceutical above quantitation limits. Only stingrays collected from the urban site (mainland California) had detectable levels of diphenhydramine compared to no detections in reference stingrays (offshore island). Sex and sampling location substantially influenced both detection rate and concentrations. Our results suggest that aspects of species' ecology and physiology should be considered for future studies investigating pharmaceutical exposure in elasmobranchs.
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Affiliation(s)
- Kady Lyons
- Department of Biological Sciences, California State University Long Beach, 1250 Bellflower Blvd, Long Beach, CA 90840, USA.
| | - S Rebekah Burket
- Department of Environmental Science, Baylor University, 1301 S University Parks Dr, Waco, TX 76706, USA.
| | - Bryan W Brooks
- Department of Environmental Science, Baylor University, 1301 S University Parks Dr, Waco, TX 76706, USA.
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35
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Germanov ES, Marshall AD, Bejder L, Fossi MC, Loneragan NR. Microplastics: No Small Problem for Filter-Feeding Megafauna. Trends Ecol Evol 2018; 33:227-232. [PMID: 29422348 DOI: 10.1016/j.tree.2018.01.005] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 01/03/2018] [Accepted: 01/10/2018] [Indexed: 11/24/2022]
Abstract
Microplastic pollution can impact filter-feeding marine megafauna, namely mobulid rays, filter-feeding sharks, and baleen whales. Emerging research on these flagship species highlights potential exposure to microplastic contamination and plastic-associated toxins. Research and its wide communication are needed to understand the magnitude of the issue and improve marine stewardship.
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Affiliation(s)
- Elitza S Germanov
- Faculty of Veterinary & Life Sciences, Murdoch University, Murdoch, Western Australia, Australia; Marine Megafauna Foundation, Truckee, CA, USA. https://twitter.com/@AliceInWaterlnd
| | - Andrea D Marshall
- Marine Megafauna Foundation, Truckee, CA, USA. https://twitter.com/@QueenofMantas
| | - Lars Bejder
- Cetacean Research Unit, Faculty of Veterinary & Life Sciences, Murdoch University, Murdoch, WA, Australia; Hawai'i Institute of Marine Biology, Kaneohe, HI, USA. https://twitter.com/@lbejder
| | - Maria Cristina Fossi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
| | - Neil R Loneragan
- Faculty of Veterinary & Life Sciences, Murdoch University, Murdoch, Western Australia, Australia. https://twitter.com/@LoneraganNR
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36
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French GCA, Stürup M, Rizzuto S, van Wyk JH, Edwards D, Dolan RW, Wintner SP, Towner AV, Hughes WOH. The tooth, the whole tooth and nothing but the tooth: tooth shape and ontogenetic shift dynamics in the white shark Carcharodon carcharias. JOURNAL OF FISH BIOLOGY 2017; 91:1032-1047. [PMID: 28815588 DOI: 10.1111/jfb.13396] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 07/18/2017] [Indexed: 06/07/2023]
Abstract
Results from this study of the white shark Carcharodon carcharias include measurements obtained using a novel photographic method that reveal significant differences between the sexes in the relationship between tooth cuspidity and shark total length, and a novel ontogenetic change in male tooth shape. Males exhibit broader upper first teeth and increased distal inclination of upper third teeth with increasing length, while females do not present a consistent morphological change. Substantial individual variation, with implications for pace of life syndrome, was present in males and tooth polymorphism was suggested in females. Sexual differences and individual variation may play major roles in ontogenetic changes in tooth morphology in C. carcharias, with potential implications for their foraging biology. Such individual and sexual differences should be included in studies of ontogenetic shift dynamics in other species and systems.
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Affiliation(s)
- G C A French
- School of Life Sciences, University of Sussex, Brighton, BN1 9QG, U.K
| | - M Stürup
- School of Life Sciences, University of Sussex, Brighton, BN1 9QG, U.K
| | - S Rizzuto
- Department of Botany and Zoology, Stellenbosch University, Stellenbosch, 7600, South Africa
| | - J H van Wyk
- Department of Botany and Zoology, Stellenbosch University, Stellenbosch, 7600, South Africa
| | - D Edwards
- Dyer Island Conservation Trust, Kleinbaai, South Africa
| | - R W Dolan
- Dyer Island Conservation Trust, Kleinbaai, South Africa
| | - S P Wintner
- KwaZulu-Natal Sharks Board and Biomedical Resource Unit, University of KwaZulu-Natal, Durban, 4000, South Africa
| | - A V Towner
- Dyer Island Conservation Trust, Kleinbaai, South Africa
| | - W O H Hughes
- School of Life Sciences, University of Sussex, Brighton, BN1 9QG, U.K
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37
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van Hees KE, Ebert DA. An evaluation of mercury offloading in two Central California elasmobranchs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 590-591:154-162. [PMID: 28262360 DOI: 10.1016/j.scitotenv.2017.02.191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 02/14/2017] [Accepted: 02/23/2017] [Indexed: 06/06/2023]
Abstract
Elasmobranchs occupy high trophic levels, accumulate high concentrations of mercury in their tissues, and have high energetic levels of maternal investment to offspring, which may cause embryos to be exposed in utero to harmful concentrations of mercury. We investigated the maternal transfer of mercury in two common coastal elasmobranch species, Triakis semifasciata and Platyrhinoidis triseriata, to determine which reproductive parameters may influence mercury offloading, and whether embryos are at risk to mercury toxicity. Mercury concentration was measured in female muscle, female liver, and embryonic tissues. The behavior of mercury in adult female tissues differed between species, as liver mercury concentration was significantly correlated to muscle mercury concentration in P. triseriata but not in T. semifasciata. Embryos of both species were found with potentially harmful mercury concentrations in their muscle tissues. Embryo mercury concentration increased with female muscle mercury concentration, but the relationship to female liver mercury was more variable. The rate of mercury transfer and overall offloading potential were significantly greater in P. triseriata than T. semifasciata. It appears that female mercury concentration, either in muscle or liver, is an important influencing factor for mercury offloading, but the impact of the differing reproductive modes in these two species was less clear. More study on this subject will continue to elucidate the factors influencing mercury offloading in sharks and rays, and how contaminant risk affects populations on a whole.
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Affiliation(s)
- Kelley E van Hees
- Pacific Shark Research Center, Moss Landing Marine Laboratories, 8272 Moss Landing Road, Moss Landing, CA 95039, USA.
| | - David A Ebert
- Pacific Shark Research Center, Moss Landing Marine Laboratories, 8272 Moss Landing Road, Moss Landing, CA 95039, USA.
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Naidoo K, Chuturgoon A, Cliff G, Singh S, Ellis M, Otway N, Vosloo A, Gregory M. Possible maternal offloading of metals in the plasma, uterine and capsule fluid of pregnant ragged-tooth sharks (Carcharias taurus) on the east coast of South Africa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:16798-16805. [PMID: 28567684 DOI: 10.1007/s11356-017-9281-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 05/17/2017] [Indexed: 06/07/2023]
Abstract
We studied the possible metal offloading onto the progeny of three pregnant female ragged-tooth sharks (Carcharias taurus) (C. taurus). The presences of five metals, i.e. aluminium (Al), arsenic (As), cadmium (Cd), lead (Pb) and selenium (Se) were validated by mass spectrometry in the maternal plasma as well as the intracapsular and uterine fluids (UF) in which embryos develop. Metals were ranked in a decreasing concentration as follows: Plasma: As > Al > Se > Pb > Cd; ICF: As > Se > Al > Cd > Pb and UF: As > Se > Al > Cd > Pb. As was present in the highest concentration in all three sharks. Al, Pb and Cd were found to be the highest within the plasma, while concentrations of Se were similar in all three fluids. These results indicate that C. taurus embryos are exposed to metals during early development, but the impact of this exposure remains unknown. To the best of our knowledge, this is the first investigation to confirm the presence of metals in the fluids that surround the developing C. taurus embryos, a species that is already listed as vulnerable.
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Affiliation(s)
- Kristina Naidoo
- Discipline of Medical Biochemistry, University of KwaZulu-Natal (UKZN), Durban, South Africa
| | - Anil Chuturgoon
- Discipline of Medical Biochemistry, University of KwaZulu-Natal (UKZN), Durban, South Africa.
| | - Geremy Cliff
- KwaZulu-Natal Sharks Board (KZNSB), Umhlanga, South Africa
- Biomedical Resource Unit, University of KwaZulu-Natal (UKZN), Durban, South Africa
| | - Sanil Singh
- Biomedical Resource Unit, University of KwaZulu-Natal (UKZN), Durban, South Africa
| | - Megan Ellis
- Gladstone Ports Corporation, Gladstone, QLD, Australia
| | - Nicholas Otway
- New South Wales Department of Primary Industries, Port Stephens Fisheries Institute, Taylors Beach, NSW, Australia
| | - Andre Vosloo
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal (UKZN), Durban, South Africa
| | - Michael Gregory
- School of Health Sciences, University of KwaZulu-Natal (UKZN), Durban, South Africa
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39
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Sawyna JM, Spivia WR, Radecki K, Fraser DA, Lowe CG. Association between chronic organochlorine exposure and immunotoxicity in the round stingray (Urobatis halleri). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 223:42-50. [PMID: 28153417 DOI: 10.1016/j.envpol.2016.12.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 12/11/2016] [Accepted: 12/12/2016] [Indexed: 06/06/2023]
Abstract
Chronic organochlorine (OC) exposure has been shown to cause immune impairment in numerous vertebrate species. To determine if elasmobranchs exhibited compromised immunity due to high OC contamination along the coastal mainland of southern California, innate immune function was compared in round stingrays (Urobatis halleri) collected from the mainland and Santa Catalina Island. Proliferation and phagocytosis of peripheral blood, splenic, and epigonal leukocytes were assessed. Percent phagocytosis and mean fluorescence intensity (MFI) were evaluated by quantifying % leukocytes positive for, and relative amounts of ingested fluorescent E. coli BioParticles. Total cell proliferation differed between sites, with mainland rays having a higher cell concentration in whole blood. ∑PCB load explained significantly higher % phagocytosis in blood of mainland rays, while ∑PCB and ∑pesticide loads described increased splenic % phagocytosis and MFI in the mainland population. Data provides evidence of strong OC-correlated immunostimulation; however, other site-specific environmental variables may be contributing to the observed effects.
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Affiliation(s)
- Jillian M Sawyna
- California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA 90840, USA.
| | - Weston R Spivia
- California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA 90840, USA
| | - Kelly Radecki
- California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA 90840, USA
| | - Deborah A Fraser
- California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA 90840, USA
| | - Christopher G Lowe
- California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA 90840, USA
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40
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Lyons K, Adams DH. First evidence of persistent organic contaminants as potential anthropogenic stressors in the Barndoor Skate Dipturus laevis. MARINE POLLUTION BULLETIN 2017; 116:534-537. [PMID: 28104230 DOI: 10.1016/j.marpolbul.2017.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 12/28/2016] [Accepted: 01/02/2017] [Indexed: 06/06/2023]
Abstract
Although exploited populations of elasmobranchs may be able to recover from fishing pressure, there is little information regarding the Barndoor Skate's ability to cope with other anthropogenic stressors such as organic contaminants (OCs). Legacy OCs were measured in liver, muscle and ova from fourteen Barndoor Skates with mature skates having significantly greater mean concentrations of OCs than immature skates, demonstrating bioaccumulation with age. Using Toxic Equivalency Factors, skates were found to have levels of PCBs that have been shown to elicit negative physiological responses in other fishes and these results highlight the need for future studies to investigate the potential impacts that bioaccumulated organic contaminants have on the recovery and conservation of this vulnerable species.
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Affiliation(s)
- Kady Lyons
- University of Calgary, 2500 University Dr NW, Calgary, AB, Canada.
| | - Douglas H Adams
- Cape Canaveral Scientific Inc, 220 Surf Rd, Melbourne Beach, FL, USA
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41
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Meyer L, Capper A, Carter S, Simpfendorfer C. An investigation into ciguatoxin bioaccumulation in sharks. Toxicon 2016; 119:234-43. [DOI: 10.1016/j.toxicon.2016.06.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 05/26/2016] [Accepted: 06/07/2016] [Indexed: 12/01/2022]
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42
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McKinney MA, Dean K, Hussey NE, Cliff G, Wintner SP, Dudley SFJ, Zungu MP, Fisk AT. Global versus local causes and health implications of high mercury concentrations in sharks from the east coast of South Africa. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 541:176-183. [PMID: 26409147 DOI: 10.1016/j.scitotenv.2015.09.074] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 09/11/2015] [Accepted: 09/15/2015] [Indexed: 06/05/2023]
Abstract
Conservation concern regarding the overharvest of global shark populations for meat and fin consumption largely surrounds documented deleterious ecosystem effects, but may be further supported by improved knowledge of possibly high levels in their edible tissues (particularly meat) of the neurotoxin, methylmercury (CH3Hg). For many regions, however, little data exist on shark tissue Hg concentrations, and reasons for Hg variation within and among species or across regions are poorly understood. We quantified total Hg (THg) in 17 shark species (total n=283) from the east coast of South Africa, a top Hg emitter globally. Concentrations varied from means of around 0.1 mg kg(-1) dry weight (dw) THg in hardnose smoothhound (Mustelus mosis) and whale (Rhincodon typus) sharks to means of over 10 mg kg(-1) dw in shortfin mako (Isurus oxyrinchus), scalloped hammerhead (Sphyrna lewini), white (Carcharodon carcharias) and ragged-tooth (Carcharias taurus) sharks. These sharks had higher THg levels than conspecifics sampled from coastal waters of the North Atlantic and North, mid-, and South Pacific, and although sampling year and shark size may play a confounding role, this result suggests the potential importance of elevated local emissions. Values of THg showed strong, species-specific correlations with length, and nearly half the remaining variation was explained by trophic position (using nitrogen stable isotopes, δ(15)N), whereas measures of foraging habitat (using carbon stable isotopes, δ(13)C) were not significant. Mercury concentrations were above the regulatory guidelines for fish health effects and safe human consumption for 88% and 70% of species, respectively, suggesting on-going cause for concern for shark health, and human consumers of shark meat.
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Affiliation(s)
- Melissa A McKinney
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
| | - Kylie Dean
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Nigel E Hussey
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Geremy Cliff
- KwaZulu-Natal Sharks Board, Umhlanga Rocks 4320, South Africa; Biomedical Resource Unit, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Sabine P Wintner
- KwaZulu-Natal Sharks Board, Umhlanga Rocks 4320, South Africa; Biomedical Resource Unit, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Sheldon F J Dudley
- KwaZulu-Natal Sharks Board, Umhlanga Rocks 4320, South Africa; Department of Agriculture, Forestry and Fisheries, Cape Town 8012, South Africa
| | - M Philip Zungu
- Department of Agriculture, Forestry and Fisheries, Cape Town 8012, South Africa
| | - Aaron T Fisk
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario N9B 3P4, Canada
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Escobar-Sánchez O, Ruelas-Inzunza J, Moreno-Sánchez XG, Romo-Piñera AK, Frías-Espericueta MG. Mercury Concentrations in Pacific Angel Sharks (Squatina californica) and Prey Fishes from Southern Gulf of California, Mexico. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2016; 96:15-19. [PMID: 26644027 DOI: 10.1007/s00128-015-1708-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 11/25/2015] [Indexed: 06/05/2023]
Abstract
Concentrations of mercury (Hg) were quantified in muscle tissues of the Pacific angel shark, Squatina californica sampled from Southern Gulf of California, Mexico, considering total length, sex, diet and the dietary risk assessment. High Hg levels are typically associated with carnivorous fishes, however S. californica showed low Hg concentrations (<1.0 µg g(-1)) in muscle (0.24 ± 0.27 µg g(-1) wet weight; n = 94). No effect of sex, total length and weight on Hg concentrations were observed in the shark (p > 0.05). Hg concentrations were highest in the darkedge mishipman: Porichthys analis (0.14 ± 0.08 µg g(-1)) and red-eye round herring Etrumeus teres (0.13 ± 0.05 µg g(-1)) relative to other prey species, which could suggest that Hg concentrations in S. californica were influenced by these species. Given the relatively low concentration of Hg across age-classes and sex, consumption of S. californica's muscle tissue poses limited risk to humans.
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Affiliation(s)
- O Escobar-Sánchez
- Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen S/N. Col. Los Pinos, 82000, Mazatlán, Sinaloa, Mexico.
| | - J Ruelas-Inzunza
- Instituto Tecnológico de Mazatlán, Calle Corsario 1, No. 203, Col. Urías, A.P. 757, 82070, Mazatlán, Sinaloa, Mexico
| | - X G Moreno-Sánchez
- Instituto Politécnico Nacional (CICIMAR-IPN), Av. Instituto Politécnico Nacional. s/n., 23096, La Paz, Baja California Sur, Mexico
| | - A K Romo-Piñera
- Universidad Autónoma de Baja California Sur, Carretera al sur km 5.5. A. P. 19-B, 23080, La Paz, Baja California Sur, Mexico
| | - M G Frías-Espericueta
- Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen S/N. Col. Los Pinos, 82000, Mazatlán, Sinaloa, Mexico
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44
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Gilbert JM, Baduel C, Li Y, Reichelt-Brushett AJ, Butcher PA, McGrath SP, Peddemors VM, Hearn L, Mueller J, Christidis L. Bioaccumulation of PCBs in liver tissue of dusky Carcharhinus obscurus, sandbar C. plumbeus and white Carcharodon carcharias sharks from south-eastern Australian waters. MARINE POLLUTION BULLETIN 2015; 101:908-13. [PMID: 26555794 DOI: 10.1016/j.marpolbul.2015.10.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 10/27/2015] [Accepted: 10/29/2015] [Indexed: 05/12/2023]
Abstract
Polychlorinated biphenyls (PCBs) are ubiquitous pollutants in the marine environment that are known to accumulate in apex predators such as sharks. Liver samples from dusky Carcharhinus obscurus, sandbar Carcharhinus plumbeus, and white Carcharodon carcharias sharks from south-eastern Australian waters were analysed for the seven indicator PCBs 28, 52, 101, 118, 138, 153 and 180. Median ∑PCBs were significantly higher in white than sandbar sharks (3.35 and 0.36 μg g(-1) lipid, respectively, p=0.05) but there were no significant differences between dusky sharks (1.31 μg g(-1) lipid) and the other two species. Congener concentrations were also significantly higher in white sharks. Significant differences in PCB concentrations between mature and immature dusky (3.78 and 0.76 μg g(-1) lipid, respectively) and sandbar (1.94 and 0.18 μg g(-1) lipid, respectively) sharks indicated that PCB concentrations in these species increased with age/growth. Higher-chlorinated congeners (hexa and heptachlorobiphenyls) dominated results, accounting for ~90% of ∑PCBs.
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Affiliation(s)
- Jann M Gilbert
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia.
| | - Christine Baduel
- The University of Queensland, National Research Centre for Environmental Toxicology (EnTox), Coopers Plains, Queensland, Australia
| | - Yan Li
- The University of Queensland, National Research Centre for Environmental Toxicology (EnTox), Coopers Plains, Queensland, Australia
| | - Amanda J Reichelt-Brushett
- Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, New South Wales 2480, Australia
| | - Paul A Butcher
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia; Fisheries NSW, NSW Department of Industry, National Marine Science Centre, Coffs Harbour, New South Wales 2450, Australia
| | - Shane P McGrath
- Fisheries NSW, NSW Department of Industry, National Marine Science Centre, Coffs Harbour, New South Wales 2450, Australia
| | - Victor M Peddemors
- Fisheries NSW, NSW Department of Industry, Sydney Institute of Marine Science, Mosman, New South Wales 2088, Australia
| | - Laurence Hearn
- The University of Queensland, National Research Centre for Environmental Toxicology (EnTox), Coopers Plains, Queensland, Australia
| | - Jochen Mueller
- The University of Queensland, National Research Centre for Environmental Toxicology (EnTox), Coopers Plains, Queensland, Australia
| | - Les Christidis
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia
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Bergés-Tiznado ME, Márquez-Farías F, Lara-Mendoza RE, Torres-Rojas YE, Galván-Magaña F, Bojórquez-Leyva H, Páez-Osuna F. Mercury and Selenium in Muscle and Target Organs of Scalloped Hammerhead Sharks Sphyrna lewini of the SE Gulf of California: Dietary Intake, Molar Ratios, Loads, and Human Health Risks. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 69:440-452. [PMID: 26369650 DOI: 10.1007/s00244-015-0226-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 09/04/2015] [Indexed: 06/05/2023]
Abstract
Selenium and mercury were evaluated in muscle, liver, kidney, brain, and the stomach contents of juvenile scalloped hammerhead shark Sphyrna lewini. Se:Hg molar ratios were calculated. The average Hg levels in muscle ranged from 0.12 to 1.17 μg/g (wet weight); Hg was <0.39 μg/g in liver and kidneys and <0.19 μg/g in brain. The lowest value of Se was found in muscle (0.4 μg/g) and the highest in kidney (26.7 μg/g). An excess of Se over Hg was found, with Se:Hg molar ratios >1. Correlations were found for Hg in muscle with size, age, and weight, and also for Hg in liver with size, age, and weight. Hg in muscle was significantly positive correlated to Hg in brain as well as Hg in liver was correlated to Hg in kidney. The highest Hg in preys was for carangid fishes; scombrid and carangid fishes contributed with the highest Se levels. Results suggest that more than 98 % of the total Hg and 62 % of Se end up in muscle and might be affected by factors, such as geographical area, age, size, and feeding habits. The muscle of S. lewini should be consumed by people cautiously so as not to exceed the recommended intake per week.
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Affiliation(s)
| | - Fernando Márquez-Farías
- Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen S/N Col. Los Pinos, C.P. 82000, Mazatlán, Sinaloa, Mexico
| | - Raúl E Lara-Mendoza
- Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen S/N Col. Los Pinos, C.P. 82000, Mazatlán, Sinaloa, Mexico
| | - Yassir E Torres-Rojas
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, P.O. Box 811, C.P. 82000, Mazatlán, Sinaloa, Mexico
- Instituto de Ecología, Pesquerías y Oceanografía del Golfo de México, Universidad Autónoma de Campeche (EPOMEX-UAC), Campus 6. Av. Héroe de Nacozari #480, C.P. 24029, Campeche, Campeche, 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
| | - Humberto Bojórquez-Leyva
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, P.O. Box 811, C.P. 82000, Mazatlán, Sinaloa, Mexico
| | - Federico Páez-Osuna
- Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mexico, Mexico.
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, P.O. Box 811, C.P. 82000, Mazatlán, Sinaloa, Mexico.
- Miembro de El Colegio de Sinaloa, Antonio Rosales 435 Pte. Culiacán, Sinaloa, Mexico.
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Cáceres-Martínez CH, Acevedo-Rincón AA, Sánchez-Montaño LR. Registros de plásticos en la ingesta de Tremarctos ornatus (Carnívora: Ursidae) y de Nasuella olivacea (Carnívora: Procyonidae) en el Parque Nacional Natural Tamá, Colombia. REV MEX BIODIVERS 2015. [DOI: 10.1016/j.rmb.2015.07.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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47
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Beaudry MC, Hussey NE, McMeans BC, McLeod AM, Wintner SP, Cliff G, Dudley SFJ, Fisk AT. Comparative organochlorine accumulation in two ecologically similar shark species (Carcharodon carcharias and Carcharhinus obscurus) with divergent uptake based on different life history. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:2051-2060. [PMID: 25899033 DOI: 10.1002/etc.3029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 12/10/2014] [Accepted: 04/15/2015] [Indexed: 06/04/2023]
Abstract
Trophic position and body mass are traits commonly used to predict organochlorine burdens. Sharks, however, have a variety of feeding and life history strategies and metabolize lipid uniquely. Because of this diversity, and the lipid-association of organochlorines, the dynamics of organochlorine accumulation in sharks may be predicted ineffectively by stable isotope-derived trophic position and body mass, as is typical for other taxa. The present study compared ontogenetic organochlorine profiles in the dusky shark (Carcharhinus obscurus) and white shark (Carcharodon carcharias), which differ in metabolic thermoregulation and trophic position throughout their ontogeny. Although greater organochlorine concentrations were observed in the larger bodied and higher trophic position white shark (e.g., p,p'-dichlorodiphenyldichloroethylene: 20.2 ± 2.7 ng/g vs 9.3 ± 2.2 ng/g in the dusky shark), slopes of growth-dilution corrected concentrations with age were equal to those of the dusky shark. Similar ontogenetic trophic position increases in both species, less frequent white shark seal predation than previously assumed, or inaccurate species-specific growth parameters are possible explanations. Inshore habitat use (indicated by δ(13)C values) and mass were important predictors in white and dusky sharks, respectively, of both overall compound profiles and select organochlorine concentrations. The present study clarified understanding of trophic position and body mass as reliable predictors of interspecific organochlorine accumulation in sharks, whereas regional endothermy and diet shifting were shown to have less impact on overall rates of accumulation.
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Affiliation(s)
- Marina C Beaudry
- Great Lakes Institute for Environmental Research, University of Windsor, Ontario, Canada
| | - Nigel E Hussey
- Great Lakes Institute for Environmental Research, University of Windsor, Ontario, Canada
| | - Bailey C McMeans
- Department of Integrative Biology, University of Guelph, Ontario, Canada
| | - Anne M McLeod
- Great Lakes Institute for Environmental Research, University of Windsor, Ontario, Canada
| | - Sabine P Wintner
- KwaZulu-Natal Sharks Board, Umhlanga, KwaZulu-Natal, South Africa
- Biomedical Resource Unit, University of KwaZulu-Natal, KwaZulu-Natal, South Africa
| | - Geremy Cliff
- KwaZulu-Natal Sharks Board, Umhlanga, KwaZulu-Natal, South Africa
- Biomedical Resource Unit, University of KwaZulu-Natal, KwaZulu-Natal, South Africa
| | - Sheldon F J Dudley
- KwaZulu-Natal Sharks Board, Umhlanga, KwaZulu-Natal, South Africa
- Biomedical Resource Unit, University of KwaZulu-Natal, KwaZulu-Natal, South Africa
- Department of Agriculture, Forestry and Fisheries, Cape Town, South Africa
| | - Aaron T Fisk
- Great Lakes Institute for Environmental Research, University of Windsor, Ontario, Canada
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Lyons K, Lowe CG. Organochlorine contaminants and maternal offloading in the lecithotrophic Pacific angel shark (Squatina californica) collected from southern California. MARINE POLLUTION BULLETIN 2015; 97:518-522. [PMID: 25986655 DOI: 10.1016/j.marpolbul.2015.05.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 05/07/2015] [Accepted: 05/10/2015] [Indexed: 06/04/2023]
Abstract
Pacific angel sharks (Squatina californica) are a benthic elasmobranch that occupy intermediate trophic level positions in coastal food webs. Angel sharks' life history characteristics make them susceptible to accumulating high amounts of contaminants. Four angel sharks were opportunistically captured in southern California and their liver and uterine contents were analyzed for PCBs, DDTs and other pesticides. High DDT:PCB ratios were found in the sharks indicating direct or indirect foraging near a local EPA Superfund Site. Organic contaminants were measured in ovulated eggs, indicating that females are able to maternally offload contaminants. Despite the potential mismatch between ovarian and uterine fecundity, we estimated females to offload approximately 13±5% of their total body load, which represents the upper limit of this capability. Although low in sample size, the initial findings from this study suggest that habitat use might play an important role in contaminant accumulation in this species.
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Affiliation(s)
- Kady Lyons
- California State University Long Beach, CA 90840, United States.
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Lyons K, Preti A, Madigan DJ, Wells RJD, Blasius ME, Snodgrass OE, Kacev D, Harris JD, Dewar H, Kohin S, MacKenzie K, Lowe CG. Insights into the life history and ecology of a large shortfin mako shark Isurus oxyrinchus captured in southern California. JOURNAL OF FISH BIOLOGY 2015; 87:200-211. [PMID: 25998058 DOI: 10.1111/jfb.12709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 04/01/2015] [Indexed: 06/04/2023]
Abstract
In June 2013, a record-breaking female Isurus oxyrinchus (total length 373 cm, mass 600 kg) was captured by rod and reel off Huntington Beach, California, where it was subsequently donated to research and provided a rare opportunity to collect the first data for a female I. oxyrinchus of this size. Counts of vertebral band pairs estimate the shark to have been c. 22 years old, depending upon assumptions of band-pair deposition rates, and the distended uteri and spent ovaries indicated that this shark had recently given birth. The stomach contained a c. 4 year-old female California sea lion Zalophus californianus that confirmed the high trophic position of this large I. oxyrinchus, which was corroborated with the high levels of measured contaminants and tissue isotope analyses.
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Affiliation(s)
- K Lyons
- California State University Long Beach, Department of Biological Sciences, 1250 Bellflower Blvd, Long Beach, CA 90840, U.S.A
| | - A Preti
- Ocean Associates, Incorporated, 4007 N Abingdon Street, Arlington, VA 22207, U.S.A
- Fisheries Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, CA 92037, U.S.A
| | - D J Madigan
- School of Marine and Atmospheric Sciences, Stony Brook University, 105 Dana Hall, Stony Brook, NY 11794-5000, U.S.A
| | - R J D Wells
- Texas A & M University Galveston, Department of Marine Biology, 1001 Texas Clipper Rd, Galveston, TX 775543, U.S.A
| | - M E Blasius
- California State University Long Beach, Department of Biological Sciences, 1250 Bellflower Blvd, Long Beach, CA 90840, U.S.A
| | - O E Snodgrass
- Ocean Associates, Incorporated, 4007 N Abingdon Street, Arlington, VA 22207, U.S.A
- Fisheries Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, CA 92037, U.S.A
| | - D Kacev
- San Diego State University, Biology Department, 5500 Campanile Dr, San Diego, CA 92182, U.S.A
| | - J D Harris
- National Marine Fisheries Service, Alaska Fisheries Science Center, National Marine Mammal Laboratory, Seattle, WA, U.S.A
| | - H Dewar
- Fisheries Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, CA 92037, U.S.A
| | - S Kohin
- Fisheries Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, CA 92037, U.S.A
| | - K MacKenzie
- School of Biological Sciences (Zoology), The University of Aberdeen, Tillydrone Avenue, Aberdeen, Scotland AB24 2TZ, U.K
| | - C G Lowe
- California State University Long Beach, Department of Biological Sciences, 1250 Bellflower Blvd, Long Beach, CA 90840, U.S.A
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Lyons K, Adams DH. Maternal offloading of organochlorine contaminants in the yolk-sac placental scalloped hammerhead shark (Sphyrna lewini). ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:553-562. [PMID: 25527298 DOI: 10.1007/s10646-014-1403-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/10/2014] [Indexed: 06/04/2023]
Abstract
Elasmobranchs are a group of animals that typically occupy upper trophic levels in food webs and have a propensity to accumulate high contaminant concentrations. To date, few studies have investigated maternal offloading processes in sharks, despite the fact that this process represents a substantial source of exposure for young sharks and is a significant pathway for contaminant redistribution within marine ecosystems. Comparable to mammalian systems, scalloped hammerhead sharks (Sphyrna lewini) utilize a yolk-sac placental strategy to nourish young in utero, which may allow females to transfer contaminants to young. Organic contaminants (PCBs and chlorinated pesticides) were measured in livers of both females and males from several age classes that were collected from U.S. Atlantic waters, including two near-term pregnant females and their embryos. Adult female hammerheads (n = 3) were found to have lower levels of PCBs compared to the younger, adult male (mean ± SD, 11.1 ± 1.0 vs. 22.8 μg g(-1) lw), but had substantially higher concentrations of pesticides (4.1 ± 0.9 vs. 1.9 μg g(-1) lw). Embryos from the two litters (n = 36) had similar levels of summed organic contaminant concentrations (4.6 ± 0.9 μg g(-1) lw) and pregnant females were estimated to offload approximately 0.03-2.3% of their hepatic contaminant load to offspring. While the potential health impacts of these transferred contaminants is unknown, this is the first study to demonstrate that scalloped hammerheads are exposed to a substantial amount of contaminants prior to birth and document maternal offloading of organochlorines in a pseudo-placental shark species. Therefore, future research should continue to investigate the potential adverse effects these contaminants have on elasmobranch physiology.
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Affiliation(s)
- Kady Lyons
- University of Calgary, 2500 University Dr NW, Calgary, AB, T2N 1N4, Canada,
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