Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/983900
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dc.contributor.authorCAMARGO, N. F. de
dc.contributor.authorRIBEIRO, J. F.
dc.contributor.authorCAMARGO, A. J. A. de
dc.contributor.authorVIEIRA, E. M.
dc.date.accessioned2026-01-22T06:40:17Z-
dc.date.available2026-01-22T06:40:17Z-
dc.date.created2014-04-03
dc.date.issued2014
dc.identifier.citationBiological Journal of the Linnean Society, London, v. 111, p. 737-747, 2014.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/983900-
dc.descriptionIndividual specialization can influence important ecological and evolutionary traits and both inter- and intra-individual variation in resource use can drive niche shifts in natural populations. We evaluated the predominance of these two factors for determining seasonal differences in the trophic niche of the didelphid marsupial Gracilinanus agilis (Burmeister, 1854) in the highly seasonal Brazilian savanna. In the three sampled sites, the population of G. agilis increased its dietary niche width in the warm?wet season, when food resources are more abundant, and there were no differences between sexes and no interaction between season and sex. However, the evaluation of intra-individual variation indicated that females reduce the number of items consumed during the warm?wet season, whereas males show no seasonal differences. Inter-individual variation nonetheless followed the overall population pattern because both sexes increased their spread with respect to food-item consumption in the warm?wet season. Additionally, we found positive relationships between body length and diet only in the warm?wet season, when larger animals fed more on invertebrates and less on fruits than the small ones. Our results show a previously unknown pattern for mammals, in which the trophic niche is wider during the high-resource season as a result of inter-individual variation along the body-size axis.
dc.language.isoeng
dc.rightsopenAccess
dc.subjectCuíca-graciosa
dc.subjectAgile Gracile Opossum
dc.titleIntra- and inter-individual variation show distinct trends as drivers of seasonal changes in the resource use of a neotropical marsupial.
dc.typeArtigo de periódico
dc.subject.thesagroDidelphis marsupialis
dc.subject.thesagroMarsupial
dc.subject.thesagroCerrado
dc.subject.nalthesaurusOpossums
dc.subject.nalthesaurusDidelphidae
dc.subject.nalthesaurusNiches
dc.subject.nalthesaurusSeasonal variation
dc.subject.nalthesaurusSavannas
dc.subject.nalthesaurusGracilinanus agilis
riaa.ainfo.id983900
riaa.ainfo.lastupdate2026-01-21
dc.identifier.doihttps://doi.org/10.1111/bij.12258
dc.contributor.institutionNICHOLAS F. DE CAMARGO, UNIVERSIDADE DE BRASÍLIA; JULIANA F. RIBEIRO, UNIVERSIDADE DE BRASÍLIA; AMABILIO JOSE AIRES DE CAMARGO, CPAC; EMERSON M. VIEIRA, UNIVERSIDADE DE BRASÍLIA.
Appears in Collections:Artigo em periódico indexado (CPAC)

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