Diet of arthropodophagous bats (Mammalia, Chiroptera) from Northwestern Argentina.

The diet of arthropodophagous bats can be influenced by several factors. Furthermore, its study is critical for understanding their role in the ecosystem as regulators of arthropod abundance. The aim of this study was to analyze the diet of 12 species beloging to two families of arthropodophagous bats from the Yungas Forests, Northwestern Argentina. We also evaluated differences in diet between well-preserved and disturbed sites, sexes, and seasons. The specimens were collected with mist nets in eight different localities, four well-preserved and four disturbed sites of the Yungas Forests. Through the analysis of feces, arthropod remains were identified until the lowest possible taxonomic level. Volume and frequency of occurrence percentages for each food item and the niche breadth for the species were estimated. A total of 475 samples from 12 species were analyzed and their diet contained arthropods from eight orders and seven families; the highest number of consumed arthropod orders were registered for Eptesicus diminutus. A low niche breadth was recorded in general for all species. The diet was significantly influenced by season and site characteristics only in E. diminutus and E. furinalis, respectively. This showed that bats could modify its diet according to the different habitats and seasons.