Individual study: The acceptance of 0.2-metre tunnels by amphibians during their migration to the breeding site
Brehm K. (1989) The acceptance of 0.2-metre tunnels by amphibians during their migration to the breeding site. Amphibians and Roads: Proceedings of the Toad Tunnel Conference, Rendsburg, Federal Republic of Germany, 29-42.
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Install culverts or tunnels as road crossings
A study in 1982–1989 of a tunnel under a road through woodland in Schleswig Holstein province, Germany (Brehm 1989) found that 21% of amphibians recorded along the drift-fencing used the tunnel. In 1988, a total of 2,446 amphibians were recorded along the fence, of which 21% passed through the tunnel. Seven species were recorded using the tunnel. For the four species for which more than 10 individuals were recorded (136–1278/species) 12–45% passed through the tunnel. The tunnel was installed in 1987 (0.2 m diameter, 10 m long). Drift-fencing 360 m long and 0.4 m high already existed at the site. Amphibians were monitored using 28 pitfall traps along the fence and one at the tunnel exit.