Postrelease movements of captive-reared Ozark hellbenders (Cryptobranchus alleganiensis bishopi)

  • Published source details Bodinof C.M., Briggler J.T., Junge R.E., Beringer J., Wanner M.D., Schuette C.D., Ettling J., Gitzen R.A. & Millspaugh J.J (2012) Postrelease movements of captive-reared Ozark hellbenders (Cryptobranchus alleganiensis bishopi). Herpetologica, 68, 160-173.


This study is summarised as evidence for the following.

Action Category

Head-start amphibians for release

Action Link
Amphibian Conservation
  1. Head-start amphibians for release

    A replicated study in 2008–2009 of Ozark hellbenders Cryptobranchus alleganiensis bishop in Missouri, USA (Bodinof et al. 2012) found that 64% of captive-reared animals survived up to a year following release. Five deaths occurred within 30 days of release, three within 50–92 days and five within 126–369 days. Most hellbenders stayed within a small area (90–94%), with only 7% moving over 20 m/day. Home ranges varied widely in the first 4–7 months after release (51–987 m2), but were significantly smaller during the following six months (11–31 m2). Of those that were known to have established a home range, 69% dispersed less than 50 m from the release point. Overall, 77% had entered their core home range within 21 days of release. Thirty-six hellbenders were captive-reared from eggs and were released back to the two original sites. Animals were radio-tracked from May 2008 to August 2009.


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 21

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 ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust