Abstract
This study describes the assemblage of ectoparasitic bat flies, their hosts, and parasitism rates in an Atlantic Forest area in southern Brazil. Bats were captured monthly for one year at two sites. We captured 95 bats belonging to nine species, but only Artibeus lituratus, Artibeus fimbriatus, Sturnira lilium (Phyllostomidae) and Myotis nigricans (Vespertilionidae) were found to be parasitized. The bat flies collected were: Streblidae — Paratrichobius longicrus (on A. lituratus) and Megistopoda aranea (on A. lituratus and A. fimbriatus), Megistopoda proxima (on S. lilium); Nycteribiidae — Basilia andersoni (on M. nigricans). Artibeus fimbriatus and S. lilium showed the highest values of parasite prevalence (60 and 35.7%, respectively) and mean intensities (1.9 and 2.1, respectively). Only two parasitized individuals of A. lituratus were found, resulting in the lowest local rate of parasite prevalence (2.6%) and mean intensity (1.0). This low rate may result from the use of ephemeral roosts in the area. The high values of frequency and number of flies per host on A. fimbriatus and S. lilium in relation to other studies could be explained by the low richness of bat flies here, and in turn, by low competition among fly species per host.
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