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What a few hairs can tell us about the resource use of giant armadillos

Integrative Zoology 2023年第1期18卷 129-142页

作者： Marcelo MAGIOLI Nina ATTIAS Gabriel MASSOCATO Danilo KLUYBER Marcelo Zacharias MOREIRA katia maria paschoal.tto micchi de barros ferraz Adriano Garcia CHIARELLO Arnaud L.J.deSBIEZ Instituto Pró-Carnívoros AtibaiaSão PauloBrazil Centro Nacional de Pesquisa e Conservação de Mamíferos Carnívoros(CENAP) Instituto Chico Mendes de Conservação da Biodiversidade(ICMBio)AtibaiaSão PauloBrazil Instituto de Conservação de Animais Silvestres(ICAS) Campo GrandeMato Grosso do SulBrazil Instituto de Pesquisas Ecológicas Organização Não GovernamentalNazaréPaulistaSão PauloBrazil Houston Zoo HoustonTexasUSA Naples Zoo at Caribbean Gardens NaplesFloridaUSA Laboratório de Ecologia Isotópica Centro de Energia Nuclear na AgriculturaUniversidade de São PauloPiracicabaSão PauloBrazil Laboratório de Ecologia Manejo e Conservação de Fauna Silvestre(LEMaC)Departamento de Ciências FlorestaisEscola Superior de Agricultura“Luiz de Queiroz”(ESALQ)Universidade de São Paulo(USP)PiracicabaSão PauloBrazil departamento de Biologia Faculdade de FilosofiaCiências e LetrasUniversidade de São Paulo(USP)Ribeirão PretoSão PauloBrazil RZSS-Royal Zoological Society of Scotland(RZSS) MurrayfieldEdinburghUK

Understanding of resource requirements of vulnerable species is key for conservation ***,we used sta-ble carbon(δ13C)and nitrogen isotopes(δ15N)of hair from giant armadillos(Priodontes maximus)to understand individual resource *** collected hair from 19 giant armadillos analyzing 34 samples from the Brazilian Pan-tanal and compared the resource use between sexes and age *** also assessed the relationship of isotopic values with individuals’body mass and the habitat type *** observed a wide variation in resource use by giant armadillos,showing that individuals consume prey that feeds on distinct resources and occupies different habitat types,indicating that there is individual variation in foraging *** giant armadillos presented a mixed diet(C3/C4 resources,forests/open areas),but a quarter of individuals had strictly C4 diets(open areas).Males are more prone to forage on C4 resources,presenting an isotopic niche 2.6-times larger than that of *** presented diets more associated with habitats with high arboreal cover(C3 resources,forests),while adults foraged more in open areas(C4 resources).This result is mirrored by the positive relationship betweenδ13C values and body mass,suggesting that larger giant armadillos tend to feed more in open *** observed thatδ13C values decreased as individuals increased the use of habitats with high arboreal *** stress the importance of con-serving the natural mosaic in the Pantanal landscape for the species persistence,given that giant armadillos require all habitat types to fulﬁll their dietary,spatial,and developmental needs.

关键词： diet ontogenetic changes resource partitioning stable isotopes telemetry

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