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Isotope-based inferences of the trophic niche of short-finned pilot whales in the Webbnesia

2024-10Journal article Open access
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dc.contributor.authorEscánez, Alejandro
dc.contributor.authorMarrero-Pérez, Jacobo
dc.contributor.authorDromby, Morgane
dc.contributor.authorPimentel-González, Atenary
dc.contributor.authorDias, Ester
dc.contributor.authorGarcía-Pastor, Ester M.
dc.contributor.authorWeyn, Mieke
dc.contributor.authorFerreira, Rita
dc.contributor.authorMontañés-Pérez, Alexandra
dc.contributor.authorFernandez, Marc
dc.contributor.authorDinis, Ana
dc.contributor.authorAlves, Filipe
dc.date.accessioned2024-10-30T11:44:47Z
dc.date.available2024-10-30T11:44:47Z
dc.date.issued2024-10
dc.description.abstractKnowledge of predator-prey interactions is key in ecological studies and understanding ecosystem function, yet this is still poorly explored in the deep-sea environment. Carbon (delta C-13: C-13/C-12) and nitrogen (delta N-15: N-15/N-14) stable isotope ratios of a deep-diving species, the short-finned pilot whale (Globicephala macrorhynchus), were used to explore knowledge gaps on its ecological niche and foraging habitats in the Webbnesia marine ecoregion (Tenerife Island, n = 27 animals vs. Madeira, n = 31; 500 km apart) where animals display distinct levels of site fidelity. Specifically, we tested whether intraspecific isotopic variation results from differences between geographic areas (due to possible foraging plasticity between regions), sexes, and/or years (2015-2020) using Generalized Linear Models. In general, significant differences (p < 0.05) were found in the stable isotope profiles of pilot whales between the two archipelagos, which were also reflected in their isotopic niche. The higher mean and wider range of delta N-15 values in Tenerife suggest that pilot whales consume prey of higher trophic levels and more diverse than Madeira. The higher mean and wider range of delta C-13 values in Madeira suggest that in that island, pilot whales rely on prey from more diverse habitats. There was significant variation between some years, but not between sexes. Finally, we discuss pilot whales' foraging strategies worldwide and infer the reliance on benthic or benthopelagic food sources in the Webbnesia.eng
dc.description.sponsorshipMAC/1.1b/149; M1420-01-0145-FEDER- 000001-OOM; 21BDCM002; 21BDCM009; COVCALD-1286139; UI/BD/151240/2021; DL 57/2016/CP1344/CT0021
dc.identifier.doi10.1016/j.marenvres.2024.106700
dc.identifier.issn0141-1136
dc.identifier.urihttp://hdl.handle.net/10400.1/26178
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationMarine and Environmental Sciences Centre
dc.relationInterdisciplinary Centre of Marine and Environmental Research
dc.relationInterdisciplinary Centre of Marine and Environmental Research
dc.relationAlgarve Centre for Marine Sciences
dc.relationPopulation ecology, biogeography and health status of sperm whales Physeter macrocephalus in a warm-temperate habitat
dc.relation.ispartofMarine Environmental Research
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectDeep-diving
dc.subjectDelphinidae
dc.subjectGlobicephala macrorhynchus
dc.subjectForaging
dc.subjectMacaronesia
dc.subjectTrophic ecology
dc.titleIsotope-based inferences of the trophic niche of short-finned pilot whales in the Webbnesiaeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleInterdisciplinary Centre of Marine and Environmental Research
oaire.awardTitleInterdisciplinary Centre of Marine and Environmental Research
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitlePopulation ecology, biogeography and health status of sperm whales Physeter macrocephalus in a warm-temperate habitat
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04292%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04423%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%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F147225%2F2019/PT
oaire.citation.startPage106700
oaire.citation.titleMarine Environmental Research
oaire.citation.volume201
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameDromby
person.givenNameMorgane
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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
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