Study

Range and diet of Eurasian otters Lutra lutra (L.) in the catchment of the River Lee (south‐east England) since re‐introduction

  • Published source details Copp G.H. & Roche K. (2003) Range and diet of Eurasian otters Lutra lutra (L.) in the catchment of the River Lee (south‐east England) since re‐introduction. Aquatic Conservation: Marine and Freshwater Ecosystems, 13, 65-76.

Actions

This study is summarised as evidence for the following.

Action Category

Release captive-bred individuals to re-establish or boost populations in native range

Action Link
Terrestrial Mammal Conservation
  1. Release captive-bred individuals to re-establish or boost populations in native range

    A replicated study in 1992–2000 on two rivers in Hertfordshire, UK (Copp & Roche 2003) found that a population of released captive-bred European otters Lutra lutra persisted for over eight years after release. Eight years after release of six captive-bred otters into rivers with no otter populations, otters were still detected in the release area. Over this time, the range used by released otters expanded, but some of this may have been due to natural recolonization. At least one otter died during the study period. In October–December 1991, six captive-bred otters were released in two rivers with no known otter populations. Individuals were approximately two years old when released. The range and persistence of the populations were assessed by surveying droppings through to February 2000.

    (Summarised by: Ricardo Rocha)

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