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Parasitic relationships between Neotropical bats and their ectoparasites are not well known, even though parasitism is one of the factors that can affect the fitness of a host population. This study characterized parasite-host relationships in relation to sex, age, body size and reproductive status in a population of    Anoura   geoffroyi    using the indices of Prevalence, Mean Intensity and Mean Abundance. Total prevalence for 93 sampled bats was 94.6%. Two species of streblid flies that are considered primary parasites of    A.   geoffroyi   ,    Exastinion   clovisi    (n = 203) and    Anastrebla   modestini    (n = 152), were the most abundant ectoparasites, followed by    Trichobius    sp. (n = 7). Two mite species,    Periglischrus   vargasi    (  Spinturnicidae  ) (n = 98) and    Spelaeorhynchus   praecursor    (  Spelaeorhynchidae  ) (n = 11), were also found. We recorded higher mean abundance and intensity of parasitism in pregnant females compared to reproductive males and reproductively inactive females, for different specific associations of ectoparasites. Host age and body condition had no effect on the parasitological indices. Even with high rates of parasitism, parasitic load did not influence host body condition, but infestation rates by mites were higher in reproductive males and higher by flies in reproductive females, showing that ectoparasites can have variable influences between the different stages of the life history of these host bats. Thus, the reproductive activity of the hosts could be an adverse factor for resistance to parasite infestations.

subterranean biology

Host-parasite associations in a population of the nectarivorous bat    Anoura   geoffroyi    (  Phyllostomidae  ) in a cave in a Brazilian ferruginous geosystem