The inter-island translocation of the New Zealand frog Leiopelma hamiltoni

  • Published source details Tocher M.D. & Pledger S. (2005) The inter-island translocation of the New Zealand frog Leiopelma hamiltoni. Applied Herpetology, 2, 401-413.


This study is summarised as evidence for the following.

Action Category

Translocate frogs

Action Link
Amphibian Conservation
  1. Translocate frogs

    A before-and-after study in 1997–2002 of the translocation of 300 Hamilton's frog Leiopelma hamiltoni from Maud Island to Motuara Island, New Zealand (Tocher & Pledger 2005) found that the population established and stabilized. Losses of translocated frogs were offset by new recruits. High mortality and/or dispersal occurred during the first two months, followed by a constant high survival rate (71–100%). New juveniles were found every breeding season from 1998, just 10 months after the translocation. By August 2002, 155 of the translocated frogs and 42 recruits had been (re)captured. New recruits had survival rates of 29–88%. Frogs were toe-clipped and translocated 25 km to the predator free island in May 1997. Frogs were released into a 10 x 10 m grid with initial densities of 3/m2. Frogs were monitored by recapturing within the grid during two sessions of 5–10 nights in 1997 and four sessions in 1998. The grid and a 100 m2 surrounding grid were searched in August 1999–2002.


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 20

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 Bat Conservation InternationalPeople trust for endangered speciesVincet Wildlife Trust