Modified live traps increase capture success of semifossorial voles in Alpine meadows

摘要: Live-trapping of rodents is facilitated by their thigmotaxis (i.e. the tendency to walk along linear structures habitat). However, in open habitats, such as meadows and prairies, where (e.g. rocks fallen branches) are generally absent densities likely be low, capturing often very demanding or ineffective. This applies especially semifossorial small mammals. Therefore, we developed a technique increase capture success these Alpine meadows. We applied box Tetrapak® with perforated floor at opening Sherman traps. Semifossorial voles (Microtus spp.), leaving burrows, would remain confined status, dark within Tetrapak®, being forced enter trap go back tunnel. traps modified were positioned immediately upon active alternating same number unmodified Then, compared captures without this modification. Two trapping sessions carried out, for 3 days/site each, eight sites (totally 2784 trap-days). Overall, 55 trapped; 41 (74.6%) caught traps, showing that they