Restoration of a tropical island: Cousine Island, Seychelles

  • Published source details Samways M.J., Hitchins P.M., Bourquin O. & Henwood J. (2010) Restoration of a tropical island: Cousine Island, Seychelles. Biodiversity and Conservation, 19, 425-434.


This study is summarised as evidence for the following.

Action Category

Restore island ecosystems

Action Link
Reptile Conservation
  1. Restore island ecosystems

    A study in 1992–2006 on a tropical island in Seychelles (Samways et al. 2010) found that a programme of island restoration, including a large range of measures such as eradicating many invasive, non-native species and measures to control poaching, resulted in an increase in the number of hawksbill Eretmochelys imbricata and green turtle Chelonia mydas nests. Between 22 and 25 years after the start of an island restoration programme there were 19–43 sea turtle nests/year and 25–35 years after the programme’s anti-poaching measures were introduced, there were 66–108 sea turtle nests/year. The authors reported that the number of sea turtle nests had increased in each year of the study. In 1970s–2000s, Cousine Island (27 ha) underwent restoration, including invasive plant and animal removal, introduction of poaching controls and anti-poaching initiatives (details not provided), reintroducing native plants and bird species, increased biosecurity measures for incoming goods and the confinement of agricultural plants to a designated area (see original paper for details on all measures undertaken). Sea turtle nests were monitored from the 1990s onwards (no details were provided).

    (Summarised by: Katie Sainsbury)

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 19

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust