Providing evidence to improve practice

Individual study: Vertebrate use of culverts under roads and railways in Madrid province, Spain

Published source details

Yanes M., Velasco J.M. & Suarez F. (1995) Permeability of roads and railways to vertebrates: the importance of culverts. Biological Conservation, 71, 217-222


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 Amphibian Conservation

A replicated study in 1993 of 17 culverts in Madrid province, Spain (Yanes, Velasco & Suarez 1995) found that amphibians used the culverts. An average of 0.03 amphibian tracks/culvert/day (range: 0–0.19) were recorded. Two culverts were selected under a motorway, 10 under local roads and five under a railway line. Amphibian tracks were monitored within culverts using marble dust over the floor. Monitoring was undertaken over four to eight days each season.