What a few hairs can tell us about the resource use of giant armadillos (original) (raw)

Integrative Zoology, 2022

Abstract

Understanding of resource requirements of vulnerable species is key for conservation planning. Here, we used stable carbon (δ13C) and nitrogen isotopes (δ15N) of hair from giant armadillos (Priodontes maximus) to understand individual resource use. We collected hair from 19 giant armadillos analyzing 34 samples from the Brazilian Pantanal and compared the resource use between sexes and age classes. We also assessed the relationship of isotopic values with individuals’ body mass and the habitat type used. We 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 behavior. Most 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 t...

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