Reply to: Shark mortality cannot be assessed by fishery overlap alone

Queiroz, Nuno; Humphries, Nicolas E.; Couto, Ana; Vedor, Marisa; Costa, Ivo da; Sequeira, Ana M. M.; Mucientes, Gonzalo; Santos, António M.; Abascal, Francisco J.; Abercrombie, Debra L.; Abrantes, Kátya G.; Acuña-Marrero, David; Afonso, André S.; Afonso, Pedro; Anders, Darrell; Araújo, Gonzalo; Arauz, Rándall; Bach, Pascal; Barnett, Adam; Bernal, Diego; Berumen, Michael L.; Lion, Sandra Bessudo; Bezerra, Natalia Priscila Alves; Blaison, Antonin; Block, Barbara A.; Bond, Mark E.; Bonfil, Ramón; Bradford, Russell W; Braun, Camrin D.; Brooks, Edward J.; Brooks, Annabelle; Brown, Judith; Bruce, Barry D.; Byrne, Michael E.; Campana, Steven E.; Carlisle, Aaron B.; Chapman, Demian D.; Chapple, Taylor K.; Chisholm, John; Clarke, Christopher R.; Clua, Eric; Cochran, Jesse E. M.; Crochelet, Estelle; Dagorn, Laurent; Daly, Ryan; Cortés, Daniel Devia; Doyle, Thomas K.; Drew, Michael; Duffy, Clinton; Erikson, Thor; Espinoza, Eduardo; Ferreira, Luciana C.; Ferretti, Francesco; Filmalter, John David; Fischer, G. Chris; Fitzpatrick, Richard; Fontes, Jorge; Forget, Fabien; Fowler, Mark; Francis, Malcolm P.; Gallagher, Austin J.; Gennari, Enrico; Goldsworthy, Simon; Gollock, Matthew; Green, Jonathan R.; Gustafson, Johan A.; Guttridge, Tristan L.; Guzmán, Héctor M.; Hammerschlag, Neil; Harman, Luke; Hazin, Fábio Hissa Vieira; Heard, Matthew S.; Hearn, Alex; Holdsworth, John C.; Holmes, Bonnie J.; Howey, Lucy A.; Hoyos-Padilla, Mauricio; Hueter, Robert E.; Hussey, Nigel E.; Huveneers, Charlie; Irion, Dylan T.; Jacoby, David; Jewell, Oliver J. D.; Johnson, Ryan; Jordan, Lance K. B.; Joyce, Warren; Daly, Clare A. Keating; Ketchum, James T.; Klimley, A. Peter; Kock, Alison A.; Koen, Pieter; Ladino, Felipe; Lana, Fernanda O.; Lea, James S. E.; Llewellyn, Fiona; Lyon, Warrick S.; MacDonnell, Anna; Macena, Bruno C. L.; Marshall, Heather; McAllister, Jaime D.; Meÿer, Michael A.; Morris, John; Nelson, Emily R.; Papastamatiou, Yannis P.; Peñaherrera-Palma, César; Pierce, Simon J.; Poisson, François; Quintero, Lina Maria; Richardson, Andrew J.; Rogers, Paul; Rohner, Christoph; Rowat, David; Samoilys, Melita; Semmens, Jayson M.; Sheaves, Marcus; Shillinger, George L.; Shivji, Mahmood S.; Singh, Sarika; Skomal, Gregory B.; Smale, Malcolm J.; Snyders, Laurenne B.; Soler, Germán; Soria, Marc; Stehfest, Kilian M.; Thorrold, Simon R.; Tolotti, Mariana Travassos; Towner, Alison V.; Travassos, Paulo; Tyminski, John P.; Vandeperre, Frédéric; Vaudo, Jeremy J.; Watanabe, Yuuki; Weber, Sam; Wetherbee, Bradley M.; White, Timothy D.; Williams, Sean; Zárate, Patricia; Harcourt, Robert; Hays, Graeme C.; Meekan, Mark G.; Thums, Michele; Irigoien, Xabier; Eguı́luz, Vı́ctor M.; Duarte, Carlos M.; Sousa, Lara L.; Simpson, Samantha J.; Southall, Emily J.; Sims, David

doi:10.1038/s41586-021-03397-3

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…Given their mobility, elasmobranchs can connect disparate deep-sea and shallow water ecosystems in tangent with high- to low-latitude movements, regulating trophic interactions and nutrient cycling on localized to ocean basin scales ( 7 ). When considering management and conservation, data on vertical distributions can inform us of a species’ vulnerability to anthropogenic threats, which is particularly relevant for elasmobranchs given that they can be subject to both targeted fisheries and bycatch worldwide ( 8 , 9 ). For example, capture probabilities and levels of mortality are influenced by depth overlap between elasmobranchs and fishing gears ( 10 ), as well as gear selectivity ( 11 ) and species physiology ( 12 ).…”

Section: Introductionmentioning

confidence: 99%

Diving into the vertical dimension of elasmobranch movement ecology

et al. 2022

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Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understand their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have mostly focused on horizontal movements. Our study addresses the knowledge gap of vertical movements by compiling the first global synthesis of vertical habitat use by elasmobranchs from data obtained by deployment of 989 biotelemetry tags on 38 elasmobranch species. Elasmobranchs displayed high intra- and interspecific variability in vertical movement patterns. Substantial vertical overlap was observed for many epipelagic elasmobranchs, indicating an increased likelihood to display spatial overlap, biologically interact, and share similar risk to anthropogenic threats that vary on a vertical gradient. We highlight the critical next steps toward incorporating vertical movement into global management and monitoring strategies for elasmobranchs, emphasizing the need to address geographic and taxonomic biases in deployments and to concurrently consider both horizontal and vertical movements.

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Section: Introductionmentioning

confidence: 99%

Diving into the vertical dimension of elasmobranch movement ecology

et al. 2022

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“…of pelagic sharks has been demonstrated to be higher where the overlap between shark space-use hotspots and longline fishing effort is greater (Queiroz et al, 2021), which underlies the long-term declines in abundance of these species attributed to overfishing (Pacoureau et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Juvenile survival and movements of two threatened oceanic sharks in the North Atlantic Ocean inferred from tag‐recovery data

Mucientes

Fernández‐Chacón

Queiroz

et al. 2023

Ecology and Evolution

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Understanding population dynamics, movements, and fishing mortality is critical to establish effective shark conservation measures across international boundaries in the ocean. There are few survival and dispersal estimates of juveniles of oceanic shark species in the North Atlantic despite it being one of the most fished regions in the world. Here we provide estimates of dispersal, survival, and proportion of fishing mortality in the North Atlantic for two threatened oceanic sharks: the blue shark (Prionace glauca) and the shortfin mako shark (Isurus oxyrinchus). Our results are based on multi-event models applied to tag-recovery data of 700 blue sharks and 132 shortfin makos tagged over a decade. A total of 60 blue sharks (8.57% of tagged) and 30 makos (22.73%) were recovered by the longline fishery between 2009 and 2017.

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“…Queiroz et al 2019). Current remote sensing studies often produce indices of spatial overlap between sharks and fisheries, but do not quantify interactions in terms of catch, bycatch, or mortality estimates (Murua et al 2021, Queiroz et al 2021. In order to fully realize the benefits of vessel tracking, effective policy regulating its consistent and transparent use must be expanded, as application is currently centered on large-scale pelagic fisheries and is limited or nonexistent in coastal and small-scale fisheries (SSF) (Kroodsma et al 2018).…”

Section: How Can We Quantify Ecosystem Servicesmentioning

confidence: 99%

Emergent research and priorities for shark and ray conservation

Jorgensen

Micheli

White

et al. 2022

Endang. Species. Res.

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Over the past 4 decades there has been a growing concern for the conservation status of elasmobranchs (sharks and rays). In 2002, the first elasmobranch species were added to Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). Less than 20 yr later, there were 39 species on Appendix II and 5 on Appendix I. Despite growing concern, effective conservation and management remain challenged by a lack of data on population status for many species, human−wildlife interactions, threats to population viability, and the efficacy of conservation approaches. We surveyed 100 of the most frequently published and cited experts on elasmobranchs and, based on ranked responses, prioritized 20 research questions on elasmobranch conservation. To address these questions, we then convened a group of 47 experts from 35 institutions and 12 countries. The 20 questions were organized into the following broad categories: (1) status and threats, (2) population and ecology, and (3) conservation and management. For each section, we sought to synthesize existing knowledge, describe consensus or diverging views, identify gaps, and suggest promising future directions and research priorities. The resulting synthesis aggregates an array of perspectives on emergent research and priority directions for elasmobranch conservation.

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Reply to: Shark mortality cannot be assessed by fishery overlap alone

Cited by 9 publications

References 12 publications

Diving into the vertical dimension of elasmobranch movement ecology

Diving into the vertical dimension of elasmobranch movement ecology

Juvenile survival and movements of two threatened oceanic sharks in the North Atlantic Ocean inferred from tag‐recovery data

Emergent research and priorities for shark and ray conservation

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