Individual study: An experimental test of gating derelict mines to conserve bat roost habitat in southeastern Australia
Slade C.P. & Law B.S. (2008) An experimental test of gating derelict mines to conserve bat roost habitat in southeastern Australia. Acta Chiropterologica, 10, 367-376
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Use cave gates to restrict public access
In a replicated, controlled, before-and-after study in autumn 2003 at four derelict mines in a forested area near Eden in south-eastern Australia (Slade & Law 2008), the number of eastern horseshoe bats Rhinolophus megaphyllus and Schreiber’s bats Miniopterus schreibersii at two caves were reduced after the installation of cave gates with a 125 mm horizontal spacing (from 540 to 290 bats, and 120 to 30 bats respectively). The number of bats aborting exit and entry flights also significantly increased. Horizontal spacing of 450 mm and 300 mm did not significantly affect bat numbers or behaviour. Bat numbers at two control caves either remained constant or increased. The four derelict mines were similar in internal height and complexity. Two of the mines were left un-gated as controls, and two were fitted with template gates consisting of 20 mm plastic tubing. Activity at experimental mines was observed in stages of 11 days: pre-treatment followed by the successive addition of horizontal bars to reduce the spacing size (to 400, 300 and 125 mm). Bats were logged automatically using infra-red beams, and observations of flight behaviour were made.