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Habitat preferences of baleen whales in a mid-latitude habitat

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dc.contributor.authorPrieto, Rui
dc.contributor.authorTobeña, Marta
dc.contributor.authorSilva, Mónica A.
dc.date.accessioned2020-01-19T20:22:41Z
dc.date.available2020-01-19T20:22:41Z
dc.date.issued2017
dc.description.abstractUnderstanding the dynamics of baleen whale distribution is essential to predict how environmental changes can affect their ecology and, in turn, ecosystem functioning. Recent work showed that mid-latitude habitats along migratory routes may play an important role on the feeding ecology of baleen whales. This study aimed to investigate the function of a mid-latitude habitat for blue (Balaenoptera musculus), fin (Balaenoptera physalus) and sei (Balaenoptera borealis) whales occurring in sympatry during spring and summer months and to what extent their environmental niches overlap. We addressed those questions by developing environmental niche models (ENM) for each species and then making pairwise comparisons of niche overlap and relative habitat patch importance among the three species. ENMs were created using sightings from the Azorean Fisheries Observer Program from May to November, between 2004 and 2009, and a set of 18 predictor environmental variables. We then assessed monthly (April–July) overlap among ENMs using a modified Hellinger׳s distance metric (I). Results show that the habitat niches of blue and fin whales are strongly influenced by primary productivity and sea surface temperature and are highly dynamic both spatially and temporally due to the oceanography of the region. Niche overlap analyses show that blue and fin whale environmental niches are similar and that the suitable habitats for the two species have high degree of spatial coincidence. These results in combination suggest that this habitat may function as a mid-latitude feeding ground to both species while conditions are adequate. The sei whale model, on the other hand, did not include variables considered to be proxies for prey distribution and little environmental niche overlap was found between this species and the other two. We argue that these results suggest that the region holds little importance as a foraging habitat for the sei whale.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.dsr2.2016.07.015pt_PT
dc.identifier.issn0967-0645
dc.identifier.urihttp://hdl.handle.net/10451/41164
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0967064516302156pt_PT
dc.subjectEnvironmental niche modeling (ENM)pt_PT
dc.subjectAzorespt_PT
dc.subjectMid-Atlanticpt_PT
dc.subjectMigrationpt_PT
dc.subjectMaxEntpt_PT
dc.subjectNiche overlappt_PT
dc.subjectBlue whalept_PT
dc.subjectFin whalept_PT
dc.subjectSei whalept_PT
dc.titleHabitat preferences of baleen whales in a mid-latitude habitatpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage167pt_PT
oaire.citation.startPage155pt_PT
oaire.citation.titleDeep Sea Research Part II: Topical Studies in Oceanographypt_PT
oaire.citation.volume141pt_PT
person.familyNameConde de Araujo Brito Prieto da Silva
person.givenNameRui
person.identifier1GNp3wcAAAAJ
person.identifier.ciencia-id9C11-BDD1-CED4
person.identifier.orcid0000-0002-0354-2572
person.identifier.scopus-author-id22986226300
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa5e3234e-04df-49f0-81e9-5e8c164c356d
relation.isAuthorOfPublication.latestForDiscoverya5e3234e-04df-49f0-81e9-5e8c164c356d

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