A tracking technique to locate small mammals at low densities

摘要: To optimize our livetrapping of low-density populations lemmings ( Dicrostonyx kilangmiutak ) and voles Microtus oeconomus (0.2–0.4 animals/ha) in the Arctic tundra, we developed a powdered-slide tracking technique to determine if burrows were occupied. Painted microscope slides covered with talcum powder on thin oil base placed at all trapping grids, only those showing activity trapped. Our capture success per trap tripled this method comparison standard grid-stake trapping, effort grid decreased by >50% after initially located. This also should be useful similar arid environments such as deserts, for obtaining relative indices density, following toe-clipped animals.