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Evaluating the influence of diet-related variables on breeding performance and home range behaviour of a top predator

2015Journal article Restricted access
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dc.contributor.authorLourenço, Rui
dc.contributor.authorDelgado, Maria del Mar
dc.contributor.authorCampioni, Letizia
dc.contributor.authorKorpimäki, Erkki
dc.contributor.authorPenteriani, Vincenzo
dc.date.accessioned2019-07-11T13:57:52Z
dc.date.available2019-07-11T13:57:52Z
dc.date.issued2015
dc.description.abstractDiet composition is linked to reproductive performance directly or indirectly by other life-history traits, including home range behaviour. The relationships between prey abundance, diet and individual fitness have often been explored. However, these relationships are complex and difficult to disentangle, especially in vertebrate top predators. Here, we present the results of a longterm study using multi-model inference procedures to elucidate the influence of diet-related variables on breeding parameters and home range behaviour of a top predator, the eagle owl Bubo bubo. Superpredation, diet diversity, rat biomass and rabbit mean weight were the most important variables when analysing reproductive parameters, suggesting that less diverse diets with greater rabbit biomass percentage may benefit reproductive performance, whereas rat biomass percentage is apparently associated with greater variation of breeding success. Earlier laying dates seem to be associated with the consumption, on average, of smaller rabbits. On the other hand, edge density was the most relevant factor determining the variation in home range behaviour, with individual characteristics, such as age and sex, also being important. Although the relative importance of the diet-related variables was generally low, mean weight of alternative prey, diet diversity and rabbit biomass also helped to explain home range parameters. In an optimal foraging context, centred on the abundance of the main prey species, our results suggest that when rabbits are less available eagle owls may increase home range size in order to obtain alternative prey, increasing at the same time their dietary diversity, which may also require higher movement speed.pt_PT
dc.description.sponsorshipFEDER; Fundação para a Ciência e Tecnologia - FCTpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citation1438390Xpt_PT
dc.identifier.doi10.1007/s10144-015-0506-1pt_PT
dc.identifier.issn1438390X
dc.identifier.urihttp://hdl.handle.net/10400.12/7086
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringer Verlagpt_PT
dc.relationCGL2012–33240pt_PT
dc.relationTHE MISSING LINK: UNRAVELING THE ECOLOGY AND BEHAVIOR OF LONG-LIVED PELAGIC SEABIRDS BEFORE THEY RECRUIT TO THE BREEDING POPULATION
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectDiet diversitypt_PT
dc.subjectForaging theorypt_PT
dc.subjectOptimal dietpt_PT
dc.subjectPredator–prey relationshipspt_PT
dc.subjectPrey size variationpt_PT
dc.titleEvaluating the influence of diet-related variables on breeding performance and home range behaviour of a top predatorpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTHE MISSING LINK: UNRAVELING THE ECOLOGY AND BEHAVIOR OF LONG-LIVED PELAGIC SEABIRDS BEFORE THEY RECRUIT TO THE BREEDING POPULATION
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F78241%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F89904%2F2012/PT
oaire.citation.conferencePlaceGermanypt_PT
oaire.citation.endPage636pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage625pt_PT
oaire.citation.titlePopulation Ecologypt_PT
oaire.citation.volume57pt_PT
oaire.fundingStreamSFRH
person.familyNameLourenço
person.familyNameCampioni
person.familyNameKorpimäki
person.familyNamePenteriani
person.givenNameRui
person.givenNameLetizia
person.givenNameErkki
person.givenNameVincenzo
person.identifier307965
person.identifier.ciencia-idFE13-DA91-F4A9
person.identifier.ciencia-id1016-2368-D535
person.identifier.orcid0000-0001-7694-0478
person.identifier.orcid0000-0002-6319-6931
person.identifier.orcid0000-0001-7596-1955
person.identifier.orcid0000-0002-9333-7846
person.identifier.ridB-7148-2012
person.identifier.ridH-1463-2015
person.identifier.scopus-author-id16304232100
person.identifier.scopus-author-id27267546800
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublicationeb29b823-96b7-4ac5-834a-40abb89607c6
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