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dc.contributor.authorLerma, Miriam
dc.contributor.authorDehnhard, Nina
dc.contributor.authorCastillo-Guerrero, José Alfredo
dc.contributor.authorHernández-Vázquez, Salvador
dc.contributor.authorVoigt, Christian C.
dc.contributor.authorGarthe, Stefan
dc.coverage.spatialClarion Island, Mexicoen_US
dc.date.accessioned2024-04-24T12:43:32Z
dc.date.available2024-04-24T12:43:32Z
dc.date.created2024-04-17T08:39:46Z
dc.date.issued2024
dc.identifier.issn2045-7758
dc.identifier.urihttps://hdl.handle.net/11250/3127955
dc.description.abstractAnimals that co-occur in a region (sympatry) may share the same environment (syntopy), and niche differentiation is expected among closely related species competing for resources. The masked booby (Sula dactylatra) and smaller congeneric redfooted booby (Sula sula) share breeding grounds. In addition to the inter-specific size difference, females of both species are also larger than the respective males (reversed sexual size dimorphism). Although both boobies consume similar prey, sometimes in mixed-species flocks, each species and sex may specialize in terms of their diet or foraging habitats. We examined inter- and intra-specific differences in isotopic values (δ13C and δ15N) in these pelagically feeding booby species during the incubation period at Clarion Island, Mexico, to quantify the degrees of inter- and intra-specific niche partitioning throughout the annual cycle. During incubation, both species preyed mainly on flyingfish and squid, but masked boobies had heavier food loads than red-footed boobies. There was no overlap in isotopic niches between masked and red-footed boobies during breeding (determined from whole blood), but there was slight overlap during the non-breeding period (determined from body feathers). Female masked boobies had a higher trophic position than conspecific males during breeding; however, no such pattern was detected in red-footed boobies. These results provide evidence of inter- and intra-specific niche partitioning in these tropical seabird species, particularly during the breeding period and in the more-dimorphic species. Our results suggest that these closely related species use different strategies to cope with the same tropical marine environment. diet, seabird, sexual segregation, stable isotope analysis, tropics Community ecologyen_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleVariations in inter-specific and sex-related niche partitioning in pelagic boobies during their annual cycleen_US
dc.title.alternativeVariations in inter-specific and sex-related niche partitioning in pelagic boobies during their annual cycleen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.rights.holder© 2024 The Authorsen_US
dc.subject.nsiVDP::Økologi: 488en_US
dc.subject.nsiVDP::Ecology: 488en_US
dc.source.volume14en_US
dc.source.journalEcology and Evolutionen_US
dc.source.issue4en_US
dc.identifier.doi10.1002/ece3.11255
dc.identifier.cristin2262205
dc.relation.projectAndre: INAPI-CONACyT: 411876en_US
dc.source.articlenumbere11255en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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