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García-Rodríguez A, Tovar-Ávila J, Arellano-Cuenca AH, Rivas-Landa D, Chávez-Arrenquín DA, Amezcua F. Size at sexual maturity, seasonal variation by maturity stages, and fecundity of the spotted round ray (Urobatis maculatus) and the thorny stingray (Urotrygon rogersi) from the northern tropical eastern Pacific. JOURNAL OF FISH BIOLOGY 2024; 104:1587-1602. [PMID: 38417833 DOI: 10.1111/jfb.15709] [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: 08/21/2023] [Revised: 01/17/2024] [Accepted: 02/15/2024] [Indexed: 03/01/2024]
Abstract
Round rays (family: Urotrygonidae) are commonly caught as by-catch by shrimp trawl fisheries in the tropical eastern Pacific (TEP). However, little information on their life history and catch species composition exists for most round ray species, preventing the evaluation of the impact of fishing on their populations. The mean size at sexual maturity (DW50), seasonal variation by maturity stages, and fecundity for two round ray species caught during shrimp trawl research cruises in the south-eastern Gulf of California (northern TEP) were estimated using a multi-model approach and inference for the first time, to determine the part of the population of each species that is being affected by shrimp trawling. Disc width (DW) ranged from 7.0 to 30.9 cm for the spotted round ray (Urobatis maculatus), and 7.2-33.5 cm for the thorny stingray (Urotrygon rogersi), with females reaching larger sizes than males in both species. The DW50 was estimated at 12.8 and 11.8 cm DW for the males and females of U. maculatus, respectively, whereas for U.rogersi, it was 15.0 and 18.4 cm DW for males and females, respectively. Embryos were found in females ≥14.5 cm DW in both species. The maximum fecundity was five embryos for U. maculatus (mean = 3.1 ± 0.2 S.E., mode = 4), and six embryos for U. rogersi (mean = 3.0 ± 0.3 S.E., mode = 2). Fecundity and embryo size did not vary with maternal size. Male and female immature and mature individuals for both species, including pregnant females, were found in the catches in all seasons of the year. Our results can help determine the vulnerability of the studied species populations to fishing pressure from shrimp trawling in the northern TEP and guide the development of future monitoring strategies and conservation actions for these species, if necessary.
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Affiliation(s)
- Alain García-Rodríguez
- Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Unidad Académica Mazatlán, Mazatlán, Mexico
| | - Javier Tovar-Ávila
- IMIPAS, Centro Regional de Investigación Acuícola y Pesquera Bahía de Banderas, Bahìa de Banderas, Mexico
| | | | - David Rivas-Landa
- Instituto Tecnológico Nacional de México, Campus Bahía de Banderas, Bahía de Banderas, Mexico
| | | | - Felipe Amezcua
- Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Unidad Académica Mazatlán, Mazatlán, Mexico
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2
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Finotto L, Walker TI, Reina RD. The effect of fishing-capture stress on the oxygen uptake rate and swimming activity of the holocephalan Callorhinchus milii. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 2024; 341:203-214. [PMID: 38158379 DOI: 10.1002/jez.2775] [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: 05/12/2023] [Revised: 12/06/2023] [Accepted: 12/11/2023] [Indexed: 01/03/2024]
Abstract
Overfishing, capture mortality, and consequences following the release of surviving animals represent severe threats to chondrichthyans. Although holocephalans are common bycaught and discarded species, other than postrelease mortality, little is known of fishing capture stress impacts. The stress response elicited after capture, essential to increase survival chances, is energetically demanding and affects the amount of energy available for other biological activities, with potential long-term impairments. We measured the effect of 30-min simulated gillnet capture on oxygen uptake rate (ṀO2 ), a proxy for metabolic rate and energy use, on recovery pattern, and on swimming activity of elephant fish (Callorhinchus milii). Immediately after simulated capture, Active and Inactive ṀO2 , measured during swimming and resting periods, respectively, were 27.5% and 43.1% lower than precapture values. This metabolic decline is likely an adaptation for reducing the energy allocated to non-essential activities, thus preserving it to sustain the stress response and processes essential for immediate survival. Supporting this, after gillnet capture, animals decreased their swimming time by 26.6%, probably due to a reduction in the energy allocated to movement. After 7 days, swimming activity and both Inactive ṀO2 and Active ṀO2 returned to precapture values. Although metabolic decline may enhance survival chances, the associated decreased swimming activity might increase predation risk and slow the physiological recovery after a fishing event. Moreover, some of the activities involved in Inactive ṀO2 are fundamental for life maintenance and therefore its depression after a capture event might have long-term repercussions for life sustenance and health.
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Affiliation(s)
- Licia Finotto
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
| | - Terence I Walker
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
| | - Richard D Reina
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
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3
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Cameron LWJ, Roche WK, Beckett K, Payne NL. A review of elasmobranch catch-and-release science: synthesis of current knowledge, implications for best practice and future research directions. CONSERVATION PHYSIOLOGY 2023; 11:coad100. [PMID: 38161598 PMCID: PMC10756054 DOI: 10.1093/conphys/coad100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 11/09/2023] [Accepted: 11/27/2023] [Indexed: 01/03/2024]
Abstract
Until relatively recently commercial fisheries have been considered the main driving factor for elasmobranch population declines. However, this belief has begun to shift with the realization that recreational elasmobranch catches may equal or exceed commercial catches in some regions. Many recreational angling fisheries for elasmobranchs involve high participation in catch-and-release angling practices. However, high release rates may not necessarily equate to high survival rates. Therefore, to assist accurate assessment of the potential impact of recreational angling on elasmobranchs, we attempted to summarize and integrate currently available information on specific risk factors associated with recreational angling, alongside associated mortality rates, as well as information on angler behaviour as it relates to identified risk factors. We categorized the major angling-related effects into two groups: injury-induced effects; and biochemical disruption-induced effects; providing a summary of each group and outlining the main lethal and sub-lethal outcomes stemming from these. These outcomes include immediate and delayed post-release mortality, behavioural recovery periods (which may in-turn confer increased predation risks), chronic health impacts and capture-induced parturition and abortion. Additionally, we detailed a range of angling practices and equipment, including hook-type, hook removal and emersion (i.e. air exposure), as well as inter- and intra-specific factors, including aerobic scope, respiratory mode, body size and species-specific behaviours, which are likely to influence injury and/or mortality rates and should therefore be considered when assessing angling-related impacts. We then utilized these data to provide a range of actionable recommendations for both anglers and policymakers which would serve to reduce the population-level impact of recreational angling on these enigmatic animals.
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Affiliation(s)
- Luke W J Cameron
- School of Natural Sciences, Department of Zoology, Trinity College Dublin, Dublin 2, Ireland
| | - William K Roche
- Inland Fisheries Ireland, 3044 Lake Drive, Citywest Business Campus, Dublin D24 CK66, Ireland
| | - Katy Beckett
- School of Natural Sciences, Department of Zoology, Trinity College Dublin, Dublin 2, Ireland
| | - Nicholas L Payne
- School of Natural Sciences, Department of Zoology, Trinity College Dublin, Dublin 2, Ireland
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4
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Leite RD, Wosnick N, Lopes AP, Saint'Pierre TD, Vianna M, Hauser-Davis RA. Ecotoxicology applied to conservation: Potential negative metal and metalloid contamination effects on the homeostatic balance of the critically endangered Brazilian guitarfish, Pseudobatos horkelii (Elasmobranchii: Rhinobatidae). CHEMOSPHERE 2023; 341:140119. [PMID: 37690553 DOI: 10.1016/j.chemosphere.2023.140119] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
Metal contamination poses a significant threat to elasmobranchs, underscoring the need for targeted conservation approaches. The critically endangered Brazilian guitarfish, Pseudobatos horkelii, confronts an array of challenges, notably overexploitation, putting its survival at risk. Our study investigated the potential toxicity arising from arsenic (As), cadmium (Cd), mercury (Hg), and lead (Pb) contamination across various adult guitarfish tissues from southeastern Brazil. Serological stress indicators, nutritional metabolites, and creatinine, an organ function marker, were also assessed, and Selenium (Se) levels were also investigated for possible protective effects. Our investigation unveiled significant correlations between metal concentrations and the determined physiological markers, shedding light on potential adverse effects. Remarkably, six correlations were indicative of how Hg and Pb negatively impact hepatic metabolite assimilation, while As was shown to influence renal phosphorus dynamics, Cd to affect rectal gland phosphorus regulation, and Pb to influence creatinine production in muscle tissue. Furthermore, Se demonstrated protective properties against Cd, Hg, and Pb, suggesting a role in alleviating the toxicity of these elements. Despite probable protective Se influences, the detected elemental interactions still suggest potential for organ impairment. These findings gain heightened significance within the context of the cumulative stressors faced by the Brazilian guitarfish, with metal contamination exhibiting the capacity to erode this species resilience against both anthropogenic and environmental pressures, thereby disrupting systemic equilibrium and jeopardizing wild populations. By investigating the intricate balance between metal accumulation and physiological consequences, our study contributes with crucial insights into potential conservation strategy formulations towards pollution for this critically endangered elasmobranch species.
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Affiliation(s)
- Renata Daldin Leite
- Programa de Pós-graduação Em Ecologia e Conservação, Universidade Federal Do Paraná, Curitiba, Brazil
| | - Natascha Wosnick
- Programa de Pós-graduação Em Zoologia, Universidade Federal Do Paraná, Curitiba, Brazil
| | - Amanda Pontes Lopes
- Programa de Pós-graduação Em Biodiversidade e Saúde, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil; Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil
| | | | - Marcelo Vianna
- Laboratório de Biologia e Tecnologia Pesqueira, UFRJ, Rio de Janeiro, Brazil; IMAM - AquaRio, Rio de Janeiro Aquarium Research Center, Rio de Janeiro, Brazil
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil.
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5
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Giareta EP, Hauser-Davis RA, Abilhoa V, Wosnick N. Carbonic anhydrase in elasmobranchs and implications of the current climate change scenario. Comp Biochem Physiol A Mol Integr Physiol 2023; 281:111435. [PMID: 37086909 DOI: 10.1016/j.cbpa.2023.111435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 04/16/2023] [Accepted: 04/17/2023] [Indexed: 04/24/2023]
Abstract
The enzyme carbonic anhydrase (CA) has well-known functions in acid-base balance, respiratory gas exchange, and osmoregulation in teleost fishes. However, studies concerning the role of CA in elasmobranchs are still scarce. Therefore, the aim of this study is to present the current status of CA studies in sharks and rays, as well as to identify gaps and emerging needs, in order to guide future studies. This review is organized according to the main roles of CA, with further considerations on climate change and CA effects indicated as paramount, as strategies in the face of climate change can be crucial for species response. The literature review revealed a reduction in publications on CA over the years. In addition, a historical research differentiation is noted, where the first assessments on the subject addressed investigations on basic CA functions, while the most recent studies present a comparative approach among species as well as interdisciplinary discussions, such as ecology and phylogeny. Considering that most elasmobranchs are threatened, future studies should prioritize non-lethal methodologies, in addition to expanding studies to climate change effects on CA.
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Affiliation(s)
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil
| | - Vinícius Abilhoa
- Programa de Pós-Graduação em Zoologia, Universidade Federal do Paraná, Curitiba, Brazil
| | - Natascha Wosnick
- Programa de Pós-Graduação em Zoologia, Universidade Federal do Paraná, Curitiba, Brazil
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Sulikowski JA, Hammerschlag N. A novel intrauterine satellite transmitter to identify parturition in large sharks. SCIENCE ADVANCES 2023; 9:eadd6340. [PMID: 36857461 PMCID: PMC9977171 DOI: 10.1126/sciadv.add6340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Determining where and when animals give birth is critical for establishing effective conservation management that protects vulnerable life stages (e.g., pregnant females and newborns) and places (e.g., nursery grounds). To date, this information has been elusive in the case of highly migratory sharks in the wild. Here, we report on the deployment a of novel intrauterine satellite tag implanted in two highly mobile apex predators, the tiger shark (Galeocerdo cuvier) and the scalloped hammerhead (Sphyrna lewini), that remotely documented the location and timing of birth by a highly migratory oceanic animal in the wild. This novel technology will be especially valuable for the protection of threatened and endangered shark species, where protection of pupping and nursery grounds is a conservation priority.
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Affiliation(s)
- James A. Sulikowski
- School of Mathematical and Natural Sciences, Arizona State University, Glendale, AZ 85306, USA
| | - Neil Hammerschlag
- Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149, USA
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7
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Finotto L, Walker TI, Reina RD. Influence of female reproductive state and of fishing-capture stress on the oxygen uptake rate of a viviparous elasmobranch. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 2023; 339:357-368. [PMID: 36690919 DOI: 10.1002/jez.2682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 01/25/2023]
Abstract
In animals discarded after a fishing capture event, the elicited stress response necessary to ensure their survival is energetically costly. This energy is diverted from other important biological activities, including growth and reproduction, possibly impairing them. Given that elasmobranchs are among the most threatened vertebrate groups, estimating capture-induced energetic changes and comparing these variations to the energy requirements of pregnancy maintenance is necessary. In pregnant southern fiddler rays (Trygonorrhina dumerilii), we measured changes in oxygen uptake rate (ṀO2 ; a proxy for metabolic rate and energy usage) in response to trawling simulation and air exposure, and estimated the oxygen requirements of sustaining late-term pregnancy and embryos. ṀO2 was measured in pregnant females, before (prestress ṀO2 ) and after trawling simulation (after-capture ṀO2 ), and again after females gave birth (postpartum ṀO2 ). After-capture ṀO2 was 31.7% lower than ṀO2 measured in minimally stressed females, suggesting a reduction in energy expenditure. This reduction is likely triggered by an initially excessive energetic investment in the stress response, and is aimed at shutting down nonessential activities to redirect energy to processes fundamental for survival. Prestress ṀO2 was 78.5% higher than postpartum ṀO2 . Capture simulation decreased ṀO2 to values similar to those observed postpartum, suggesting a capture-induced reduction in oxygen and energy allocation to pregnancy and embryonic respiration, which could be associated with reproductive impairments. These data, by better estimating the impact of capture and discard on energetic requirements and reproductive fitness, may support the introduction of area and/or seasonal closures to fishing.
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Affiliation(s)
- Licia Finotto
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
| | - Terence I Walker
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
| | - Richard D Reina
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
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8
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Maganhe BL, Camilo LDO, Kurokawa RE, Gallo Neto H, Sanches EG. Birth and growth of the shortnose guitarfish Zapteryx brevirostris (Müller & Henle, 1841) (Chondrichthyes, Rhinobatidae) in captivity. JOURNAL OF FISH BIOLOGY 2023; 102:119-127. [PMID: 36217919 DOI: 10.1111/jfb.15245] [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: 07/11/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
Endemic to the south-west Atlantic Ocean, the shortnose guitarfish (Zapteryx brevirostris) is a small species, classified as endangered by the IUCN. Although reproduction in captivity has been successful for some species, a range of factors can limit the success of captive breeding programmes for elasmobranchs. In Brazil, the Ubatuba Aquarium was the first public aquarium to reproduce small-sized elasmobranchs. Since 2018, at least five parturition events have been recorded for Z. brevirostris at the institution. From a total of 13 live neonates that rearing was attempted, the mean ± standard error of weight, total length (TL) and disc width at birth were 17.47 ± 1.6 g, 13.25 ± 0.7 cm and 6.53 ± 0.2 cm, respectively. The mean weight as well as mean TL were higher for females at all births, with 26.15 g and 15.07 cm for females in comparison with 17.09 g and 13.94 cm for males. Considering the increasing risk of extinction that the species is facing, age and growth studies are fundamental for the success of conservation, improving the knowledge of Z. brevirostris life cycle so that a more efficient and sustainable management can be carried out. This study provides important data, as well as directions for captive breeding of the species.
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Affiliation(s)
- Bruna Larissa Maganhe
- Ubatuba Aquarium, Ubatuba, Brazil
- Marine Fish Laboratory, Fisheries Institute, Ubatuba, Brazil
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Saltzman J, Graham J, Wester J, White ER, Macdonald CC. #Sawfish: Social media to assess public perceptions, behaviors, and attitudes towards a critically endangered species. FRONTIERS IN CONSERVATION SCIENCE 2022. [DOI: 10.3389/fcosc.2022.987909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Monitoring population size and dynamics of threatened or low-density species is often both logistically difficult and costly. Recently, social media has emerged as a new tool for species monitoring. In this study, we expand on the use of social media posts as a tool to monitor the spatial and temporal distribution and public perceptions toward the smalltooth sawfish Pristis pectinata. We recorded 442 encounters with smalltooth sawfish from 2018 to 2021 in the form of Instagram posts. We identified locations of encounters within the following regions: Florida Keys, Everglades, South Florida (Miami/Fort Lauderdale), Caloosahatchee River, Bahamas, Upper Charlotte Harbor, Port St. Lucie, Ten Thousand Islands, Tampa, Naples, and Cape Canaveral. We found the greatest number of encounters occurred in the Florida Keys. In addition to spatiotemporal analysis, we used the captions of the posts to assess public attitudes and behaviors toward this charismatic species. This revealed individuals who encounter sawfish feel in general positive about their experience (over half described their encounter using positive language). We also found that sawfish were frequently caught as bycatch when other species (e.g., shark, tarpon, bonefish) were being targeted. Notably, in 12.6% of cases where sawfish were caught, they were being directly targeted. We also identified specific problematic or illegal handling behaviors from image and caption analysis. In addition to captured sawfish, we found sawfish are also frequently observed by beachgoers, boaters, and divers— however, in many cases these encounters may not be reported.
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Wosnick N, Leite RD, Giareta EP, Morick D, Hauser-Davis RA. Unraveling Metabolite Provisioning to Offspring Through Parental Fluids: A Case Study of the Brazilian Guitarfish, Pseudobatos horkelii. Front Physiol 2022; 13:911617. [PMID: 35795650 PMCID: PMC9251413 DOI: 10.3389/fphys.2022.911617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 05/18/2022] [Indexed: 11/13/2022] Open
Abstract
Elasmobranchs have a very distinct metabolism, and many aspects related to the energetic dynamics of these animals remain poorly investigated. The reproductive period is particularly vulnerable for viviparous species, as part of the energy reserves of the parental biomass is reallocated for gamete production and embryo development. In this context, this study aimed to characterize parental metabolite provisioning to the offspring (both sperm and developing embryos) of the Brazilian Guitarfish, Pseudobatos horkelii, through glucose, β-hydroxybutyrate, triglycerides, and total cholesterol determinations in the uterine liquid (UL) and serum of pregnant females and in the seminal fluid (SF) and serum of males during the copulation period. No significant difference was observed for the analyzed markers between the UL and SF. Except for triglycerides, higher in female serum samples, all other energy markers were present at similar concentrations in the serum of both females and males. When comparing female UL and serum, significant differences were observed for triglycerides and total cholesterol. No differences were observed between SF and serum in males. The results indicate that all markers are being made available to offspring, possibly complementary to the yolk in the case of maternal liquid, and as an additional source for sperm mobilization required during egg fertilization in the case of the paternal fluid. Correlations between the markers in the parental matrices were also noted, compatible with the metabolic pathways activated during energy mobilization in vertebrates. Moreover, distinct marker predominance patterns were also noted for both UL and SF. Energy mobilization characterization directed to offspring through parental fluids aids in unraveling metabolic dynamics during the reproduction stage while also providing support for stress physiology studies to evaluate the indirect effects of parental allostatic overload in both sperm and developing embryos. Finally, energy mobilization assessments of parental fluids may also help elucidate how internal fertilization and viviparity evolved in this very distinct taxonomic group.
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Affiliation(s)
- Natascha Wosnick
- Programa de Pós-graduação em Zoologia, Universidade Federal do Paraná, Curitiba, Brazil
- *Correspondence: Natascha Wosnick, ; Rachel Ann Hauser-Davis,
| | - Renata Daldin Leite
- Programa de Pós-graduação em Zoologia, Universidade Federal do Paraná, Curitiba, Brazil
| | | | - Danny Morick
- Morris Kahn Marine Research Station, University of Haifa, Haifa, Israel
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, Israel
- Hong Kong Branch of Southern Marine Science and Engineering, Guangdong Laboratory (Guangzhou), Hong Kong, Hong Kong SAR, China
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil
- *Correspondence: Natascha Wosnick, ; Rachel Ann Hauser-Davis,
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Prado AC, Wosnick N, Adams K, Leite RD, Freire CA. Capture‐induced vulnerability in male Shortnose guitarfish during their reproductive period. Anim Conserv 2021. [DOI: 10.1111/acv.12734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Aline Cristina Prado
- Laboratório de Fisiologia Comparativa de Osmorregulação Departamento de Fisiologia Universidade Federal do Paraná Curitiba Paraná Brazil
| | - Natascha Wosnick
- Programa de Pós‐graduação em Zoologia Universidade Federal do Paraná Curitiba Paraná Brazil
| | - Kye Adams
- School of Biological Sciences The University of Western Australia, Crawley WA Australia
| | - Renata Daldin Leite
- Laboratório de Fisiologia Comparativa de Osmorregulação Departamento de Fisiologia Universidade Federal do Paraná Curitiba Paraná Brazil
| | - Carolina Arruda Freire
- Laboratório de Fisiologia Comparativa de Osmorregulação Departamento de Fisiologia Universidade Federal do Paraná Curitiba Paraná Brazil
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12
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Wosnick N, Da Costa De Lima Wosiak C, Machado Filho OC. Pay to conserve: what we have achieved in 10 years of compensatory releases of threatened with extinction guitarfishes. Anim Conserv 2020. [DOI: 10.1111/acv.12651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- N. Wosnick
- Programa de Pós‐graduação em Zoologia Universidade Federal do Paraná Curitiba Brazil
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de Sousa Rangel B, de Castro Ribeiro D, Chagas JMA, Spada L, Moreira RG, da Silva Ribeiro C. Effects of biological traits on capture-induced parturition in a freshwater stingray and perspectives for species management. JOURNAL OF FISH BIOLOGY 2020; 97:546-551. [PMID: 32447770 DOI: 10.1111/jfb.14412] [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: 04/21/2020] [Revised: 05/20/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
Elasmobranchs are particularly vulnerable to overexploitation and population depletion, especially due to their life-history traits, such as low reproductive output and slow growth. Given that capture-induced parturition (abortion or premature birth) is a common consequence of fisheries in elasmobranchs, but still little studied, we investigated how the abortion/premature birth process varies in response to reproductive traits in a freshwater stingray, Potamotrygon amandae. Our results revealed that capture-induced parturition was affected by reproductive traits, such as litter size (one to seven) and gestation stage. The event occurred faster in pregnant females with high litter size during late pregnancy. Also, as found in other elasmobranchs, litter size was positively correlated with maternal size. These findings indicate that larger pregnant females in late pregnancy are more vulnerable to capture-induced parturition. This study improves our understanding of the capture-induced parturition process in stingrays, and provides useful information for management strategies and future recommendations for elasmobranch conservation.
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Affiliation(s)
- Bianca de Sousa Rangel
- Departamento de Fisiologia, Instituto de Biociências, Laboratório de Metabolismo e Reprodução de Organismos Aquáticos, Universidade de São Paulo, São Paulo, Brazil
| | - Douglas de Castro Ribeiro
- Departamento de Zoologia e Botânica, Laboratório de Ictiologia, Rua Cristóvão Colombo, Universidade Estadual Paulista, Instituto de Biociências, Letras e Ciências Exatas, São José do Rio Preto, Brazil
| | - Jumma M A Chagas
- Departamento de Biologia e Zootecnia, Laboratório de Ecologia do Parasitismo, Universidade Estadual Paulista, Ilha Solteira, Brazil
| | - Lucas Spada
- Departamento de Biologia e Zootecnia, Laboratório de Estudos em Fisiologia Animal, Universidade Estadual Paulista, Ilha Solteira, Brazil
- Programa de Pós Graduação em Ciências (Fisiologia) Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
| | - Renata G Moreira
- Departamento de Fisiologia, Instituto de Biociências, Laboratório de Metabolismo e Reprodução de Organismos Aquáticos, Universidade de São Paulo, São Paulo, Brazil
| | - Cristiéle da Silva Ribeiro
- Departamento de Biologia e Zootecnia, Laboratório de Estudos em Fisiologia Animal, Universidade Estadual Paulista, Ilha Solteira, Brazil
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