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Beyond post-release mortality: inferences on recovery periods and natural mortality from electronic tagging data for discarded lamnid sharks

2021-04Journal article Open access
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dc.contributor.authorBowlby, Heather D.
dc.contributor.authorBenoît, Hugues P.
dc.contributor.authorJoyce, Warren
dc.contributor.authorSulikowski, James
dc.contributor.authorCoelho, Rui
dc.contributor.authorDomingo, Andrés
dc.contributor.authorCortés, Enric
dc.contributor.authorHazin, Fabio
dc.contributor.authorMacias, David
dc.contributor.authorBiais, Gérard
dc.contributor.authorCasaca Santos, Catarina
dc.contributor.authorAnderson, Brooke
dc.date.accessioned2021-04-08T13:49:12Z
dc.date.available2021-04-08T13:49:12Z
dc.date.issued2021-04
dc.description.abstractAccurately characterizing the biology of a pelagic shark species is critical when assessing its status and resilience to fishing pressure. Natural mortality (M) is well known to be a key parameter determining productivity and resilience, but also one for which estimates are most uncertain. While M can be inferred from life history, validated direct estimates are extremely rare for sharks. Porbeagle (Lamna nasus) and shortfin mako (Isurus oxyrinchus) are presently overfished in the North Atlantic, but there are no directed fisheries and successful live release of bycatch is believed to have increased. Understanding M, post-release mortality (PRM), and variables that affect mortality are necessary for management and effective bycatch mitigation. From 177 deployments of archival satellite tags, we inferred mortality events, characterized physiological recovery periods following release, and applied survival mixture models to assess M and PRM. We also evaluated covariate effects on the duration of any recovery period and PRM to inform mitigation. Although large sample sizes involving extended monitoring periods (>90 days) would be optimal to directly estimate M from survival data, it was possible to constrain estimates and infer probable values for both species. Furthermore, the consistency of M estimates with values derived from longevity information suggests that age determination is relatively accurate for these species. Regarding bycatch mitigation, our analyses suggest that juvenile porbeagle are more susceptible to harm during capture and handling, that keeping lamnid sharks in the water during release is optimal, and that circle hooks are associated with longer recovery periods for shortfin mako.pt_PT
dc.description.sponsorshipEU/MARE/2012/21/ FAPESP/19740/2014/ SFRH/BD/139187/2018pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBowlby HD, Benoît HP, Joyce W, Sulikowski J, Coelho R, Domingo A, Cortés E, Hazin F, Macias D, Biais G, Santos C and Anderson B (2021) Beyond Post-release Mortality: Inferences on Recovery Periods and Natural Mortality From Electronic Tagging Data for Discarded Lamnid Sharks. Front. Mar. Sci. 8:619190. doi: 10.3389/fmars.2021.619190pt_PT
dc.identifier.doi10.3389/fmars.2021.619190pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.1/15348
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectNatural mortalitypt_PT
dc.subjectRecovery periodpt_PT
dc.subjectLamnid sharkspt_PT
dc.subjectAtlanticpt_PT
dc.subjectSurvivalpt_PT
dc.subjectMitigationpt_PT
dc.subjectBycatchpt_PT
dc.titleBeyond post-release mortality: inferences on recovery periods and natural mortality from electronic tagging data for discarded lamnid sharkspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleFrontiers in Marine Sciencept_PT
oaire.citation.volume8pt_PT
person.familyNameCoelho
person.familyNameCasaca Santos
person.givenNameRui
person.givenNameCatarina
person.identifier134638
person.identifier.ciencia-idDC1A-20B7-EAC0
person.identifier.ciencia-id0512-E394-FF42
person.identifier.orcid0000-0003-3813-5157
person.identifier.orcid0000-0002-2253-0737
person.identifier.ridC-1163-2008
person.identifier.scopus-author-id56257111100
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isAuthorOfPublicationf9c93cfc-9da0-4049-909e-41c83114e549
relation.isAuthorOfPublication.latestForDiscoveryf9c93cfc-9da0-4049-909e-41c83114e549

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