Reproductive stage influences roost use by tree roosting female eastern pipistrelles, Pipistrellus subflavus

Abstract

:We investigated the effect of reproductive stage (reproductive versus non-reproductive) on summer roost use by adult female eastern pipistrelles. Due to differing selective pressures associated with summer reproductive and non-reproductive stages, we hypothesized that roost tree species and tree characteristics used by adult female eastern pipistrelles would differ depending on the individual’s reproductive stage. Reproductive females preferred roost trees in the genus Quercus, whereas non-reproductive females did not prefer a specific species group. Reproductive females roosted at lower levels in the forest strata, closer to a permanent water source, and farther from the nearest forest/field edge. We stress the importance of recognizing the potential for changes in habitat use by adult female bats during summer months depending on whether individuals are reproductive or non-reproductive. Combining data from reproductive classes of adult females may mask important roost characteristics unique to maternity colonies of bats.