Study

Effectiveness of road tunnels for the Santa Cruz long-toed salamander

  • Published source details Allaback M.L. & Laabs D.M. (2002) Effectiveness of road tunnels for the Santa Cruz long-toed salamander. Transactions of the Western Section of the Wildlife Society, 38/39, 5-8

Actions

This study is summarised as evidence for the following.

Action Category

Install culverts or tunnels as road crossings

Action Link
Amphibian Conservation
  1. Install culverts or tunnels as road crossings

    A small, replicated study in 2000–2001 of two amphibian tunnels constructed under a road in a residential development in Santa Cruz County, California, USA (Allaback & Laabs 2002-2003) found that a small proportion of migrating Santa Cruz long-toed salamanders Ambystoma macrodactylum croceum used tunnels. A total of 23 adult salamanders passed through the tunnels. Of the 44 adults marked along the drift-fence, only four (9%) were captured on the opposite side of one tunnel and none for the other. The two cement polymer amphibian tunnels were installed in 1999. They were 0.3 x 0.5 m or 0.2 x 0.2 m and 11–12 m long. Entrances were screened with mesh to reduce predator access. Drift-fences (0.4–0.8 m high) were permanently installed at tunnel entrances and along the road to connect tunnels (300 m). Salamanders were monitored by visual survey along the drift-fence on five rainy nights in December–January. Each animal was marked. Pitfall traps captured individuals passing through tunnels.

     

Output references

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