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Trophic-mediated pelagic habitat structuring and partitioning by sympatric elasmobranchs

2022Journal article Open access
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dc.contributor.authorAfonso, André S.
dc.contributor.authorMacena, Bruno C.L.
dc.contributor.authorMourato, Bruno
dc.contributor.authorBezerra, Natalia P.A.
dc.contributor.authorMendonça, Sibele
dc.contributor.authorQueiroz, Joyce D.G.R. de
dc.contributor.authorHazin, Fábio H.V.
dc.date.accessioned2023-07-25T16:48:04Z
dc.date.available2023-07-25T16:48:04Z
dc.date.issued2022
dc.descriptionFunding provided by the TRIATLAS project through the European Union’s Horizon 2020 Research and Innovation Programme (grant No. 817578), the Conselho Nacional de Desenvolvimento Cientı́fico e Tecnológico - CNPq (478070/2008-0, 482557/2011-7), the Fundação Grupo Boticário (0760/2007.2), the Save Our Seas Foundation (66/2008), and the Fundação para a Ciência e Tecnologia – FCT (UIDB/04292/2020; UIDP/04292/2020), is deeply acknowledged. Scholarships granted by the FACEPE foundation to NPAB and by CNPq to BCLM (140567/2012-7) are also acknowledged. We acknowledge the Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio), the Brazilian Navy (SECIRM) and the Conselho Nacional de Desenvolvimento Cientı́fico e Tecnológico (CNPq) through the Pró-Arquipélago Program (557183/2009-0; 562062/20102-6; 405460/2012-0; 442884/2015-0) for providing precious logistic support.pt_PT
dc.description.abstractPelagic elasmobranchs are key elements of oceanic ecosystems and must be preserved if marine trophic networks are to be kept in balance. Yet, they face intense fishing pressure that has been threatening their populations worldwide. Ensuring proper conservation management of these taxa depends on a better understanding of the strategies they use to explore the pelagic realm and their contributions to trophic web structuring across the ocean column. This study aimed at examining relationships between vertical habitat use and trophic attributes among six sympatric pelagic elasmobranchs using satellite transmitting tags in the western equatorial South Atlantic Ocean. The vertical movements of 35 elasmobranch individuals were tracked during an overall total of 1911 days. Clear relationships between species’ feeding habits, maximum diving depths, and proportion of time spent either in epipelagic or in surface waters were evidenced by Bayesian generalized linear mixed models and multivariate analysis. Filter-feeders made most use of deep waters from the mesopelagic and bathypelagic and shifted their diving depths in phase with diel vertical migrations of the deep scattering layer, i.e., shallower during the night and deeper during the day. Specialists exhibited distinct diving patterns in epipelagic and mesopelagic waters across the diel period which are potentially indicative of habitat partitioning, whereas generalists were more surface-oriented but also explored deeper waters compared to specialists. The trophic level also seemed to influence elasmobranch maximum diving depths, which tended to become shallower as species’ trophic level increased. These results corroborate previous evidence of widespread vertical habitat partitioning among sympatric pelagic predators and depict a trophicmediated structuring of the pelagic environment where top-down control may be exerted at different depths by distinct species. Further research is yet required to understand the role of elasmobranch vertical movements in structuring pelagic habitats as well as to guide ecosystem-based fisheries management aimed at reducing species susceptibility to fishing gear and at preserving the structure and functionality of marine trophic networks.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAfonso AS, Macena BCL, Mourato B, Bezerra NPA, Mendonc¸a S, de Queiroz JDGR and Hazin FHV (2022) Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs. Front. Mar. Sci. 9:779047. doi: 10.3389/fmars.2022.779047pt_PT
dc.identifier.doi10.3389/fmars.2022.779047pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.8/8688
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontierspt_PT
dc.relationTropical and South Atlantic climate-based marine ecosystem predictions for sustainable management
dc.relationMarine and Environmental Sciences Centre
dc.relationMarine and Environmental Sciences Centre
dc.relation.publisherversionhttps://www.frontiersin.org/articles/10.3389/fmars.2022.779047/fullpt_PT
dc.subjectDiving behaviorpt_PT
dc.subjectForaging strategypt_PT
dc.subjectTelemetrypt_PT
dc.subjectMarine predatorspt_PT
dc.subjectMesopelagicpt_PT
dc.subjectSharkpt_PT
dc.subjectRaypt_PT
dc.titleTrophic-mediated pelagic habitat structuring and partitioning by sympatric elasmobranchspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTropical and South Atlantic climate-based marine ecosystem predictions for sustainable management
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/817578/EU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04292%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04292%2F2020/PT
oaire.citation.titleFrontiers in Marine Sciencept_PT
oaire.citation.volume9pt_PT
oaire.fundingStreamH2020
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameAfonso
person.familyNameMacena
person.familyNameMourato
person.givenNameAndré
person.givenNameBruno C.L.
person.givenNameBruno
person.identifier983366
person.identifier.ciencia-idB513-502C-1865
person.identifier.ciencia-id071E-6655-CDB7
person.identifier.orcid0000-0001-9129-278X
person.identifier.orcid0000-0001-5010-8560
person.identifier.orcid0000-0001-8405-3983
person.identifier.scopus-author-id24480225500
person.identifier.scopus-author-id36998014400
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameEuropean Commission
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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