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A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground

2023Journal article Open access
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dc.contributor.authorGraça Aranha, Sofia
dc.contributor.authorTeodosio, MA
dc.contributor.authorBaptista, Vânia
dc.contributor.authorErzini, Karim
dc.contributor.authorDias, Ester
dc.date.accessioned2023-03-14T09:57:29Z
dc.date.available2023-03-14T09:57:29Z
dc.date.issued2023
dc.description.abstractDeep-water sharks are among the most vulnerable deep-water taxa because of their extremely conservative life-history strategies (i.e., late maturation, slow growth, and reproductive rates), yet little is known about their biology and ecology. Thus, this study aimed at investigating the trophic ecology of five deep-water shark species, the birdbeak dogfish (Deania calcea), the arrowhead (D. profundorum), the smooth lanternshark (Etmopterus pusillus), the blackmouth catshark (Galeus melastomus) and the knifetooth dogfish (Scymnodon ringens) sampled onboard a crustacean bottom-trawler off the south-west coast of Portugal. We combined carbon and nitrogen stable isotopes with RNA and DNA (RD) ratios to investigate the main groups of prey assimilated by these species and their nutritional condition, respectively. Stable isotopes revealed overall small interspecific variability in the contribution of different taxonomic groups to sharks' tissues, as well as in the origin of their prey. S. ringens presented higher delta N-15 and delta C-13 values than the other species, suggesting reliance on bathyal cephalopods, crustaceans and teleosts; the remaining species likely assimilated bathy-mesopelagic prey. The RD ratios indicated that most of the individuals had an overall adequate nutritional condition and had recently eaten. This information, combined with the fact that stable isotopes indicate that sharks assimilated prey from the local or nearby food webs (including commercially important shrimps), suggests a potential overlap between this fishing area and their foraging grounds, which requires further attention.pt_PT
dc.description.sponsorshipLA/P/0101/2020; SOSF 501pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1111/jfb.15306pt_PT
dc.identifier.issn0022-1112
dc.identifier.urihttp://hdl.handle.net/10400.1/19241
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationInterdisciplinary Centre of Marine and Environmental Research
dc.relationInterdisciplinary Centre of Marine and Environmental Research
dc.relationCondition and survival rates of the most frequently discarded deep-sea elasmobranchs from crustacean bottom trawl fisheries in the southern Portugal
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBottom-trawlpt_PT
dc.subjectDietpt_PT
dc.subjectEcophysiologypt_PT
dc.subjectNorth-east Atlanticpt_PT
dc.subjectRNApt_PT
dc.subjectDNApt_PT
dc.subjectStable isotopespt_PT
dc.titleA glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing groundpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleInterdisciplinary Centre of Marine and Environmental Research
oaire.awardTitleInterdisciplinary Centre of Marine and Environmental Research
oaire.awardTitleCondition and survival rates of the most frequently discarded deep-sea elasmobranchs from crustacean bottom trawl fisheries in the southern Portugal
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04423%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04423%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F147493%2F2019/PT
oaire.citation.titleJournal of Fish Biologypt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamOE
person.familyNameGraça Aranha Carvalho Ramos
person.familyNameTeodosio
person.familyNameBaptista
person.familyNameErzini
person.givenNameSofia
person.givenNameMaria
person.givenNameVânia
person.givenNameKarim
person.identifier479502
person.identifier.ciencia-idAA1C-EB0A-3F61
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.ciencia-id0C1F-4F1B-256B
person.identifier.ciencia-idD917-7133-341A
person.identifier.orcid0000-0002-3664-6896
person.identifier.orcid0000-0002-0939-9885
person.identifier.orcid0000-0002-1428-3334
person.identifier.orcid0000-0002-1411-0126
person.identifier.ridB-5077-2013
person.identifier.ridM-5216-2013
person.identifier.scopus-author-id56196396700
person.identifier.scopus-author-id55820032600
person.identifier.scopus-author-id7004015948
project.funder.identifierhttp://doi.org/10.13039/501100001871
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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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