Moving amphibians and reptiles is often treated as mitigation; long-term success was rare in the review
WHAT THE EVIDENCE SAYS
A review of 313 amphibian and reptile translocation cases from 2007–2023 scored outcomes with a standardized 0–4 framework. Nineteen percent of conservation cases reached stages 3 or 4, versus 6% of mitigation cases reaching stage 3 and none stage 4; mitigation translocations also had about twice the failure rate. Conservation projects more often removed threats before release and monitored longer afterward, and both practices were associated with higher success stages.
WHY IT MATTERS / OUR READ
The counter-signal is against treating relocation as an ecological equivalent to avoiding habitat loss. Moving animals can be necessary, but the evidence base says mitigation translocation frequently stops short of long-term conservation success unless the threat and post-release system are addressed.
CAVEATS / UNCERTAINTY
Case studies are heterogeneous and subject to publication and monitoring-duration biases; some projects may not yet have run long enough to reach later stages. Associations between threat removal, monitoring and success do not prove those practices alone caused the outcome, and the review does not imply every individual translocation is inappropriate.
SOURCE
Conservation Biology — review
View original evidence ↗
Among 313 translocation case studies, only 6% of mitigation projects reached standardized success stage 3 and none reached stage 4; conservation projects performed better but still rarely reached the highest stages.
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