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Providing evidence to improve practice

Individual study: Influence of reservoirs created by small dams on the activity of bats

Published source details

Hintze F., Duro V., Carvalho J.C., Eira C., Rodrigues P.C. & Vingada J. (2016) Influence of reservoirs created by small dams on the activity of bats. Acta Chiropterologica, 18, 395-408

This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Create or maintain small dams to provide foraging and drinking habitat for bats Bat Conservation

A replicated, site comparison study in 2011 at five dams in northeast Portugal (Hintze et al. 2016) found that dam reservoirs had greater foraging and drinking activity of four bat species than the streams feeding into them. The bat species were common pipistrelle Pipistrellus pipistrellus, Kuhl’s pipistrelle Pipistrellus kuhlii, Daubenton’s bat Myotis daubentonii and European free-tailed bat Tadarida teniotis (data reported as statistical model results). Mixed results were reported for six other bat species but numbers were too low for statistical analysis. Dam reservoirs varied in size from 50,000 to 280,000 m2. All streams had annual average flow rates of 100–300 mm and similar riparian vegetation. At each of five dams, bat activity was recorded using bat detectors at four sampling points (the upstream and downstream sides of both the dam and stream). Each point was randomly sampled on three nights (for 3 h from sunset) between July and October 2011 with one stream and one dam point sampled simultaneously.

(Summarised by Anna Berthinussen)