Modify fishing gear to reduce reptile mortality in the event of unwanted catch

How is the evidence assessed?
  • Effectiveness
    not assessed
  • Certainty
    not assessed
  • Harms
    not assessed

Study locations

Key messages

  • One study evaluated the effects on reptile populations of using modified gear to reduce reptile mortality in the event of unwanted catch. This study was in the USA.



  • Survival (1 study): One replicated study in the USA found that few diamondback terrapins died in crab pots fitted with mesh chimneys.


About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A replicated study in 2012–2013 in five estuarine sites in North Carolina, USA (Chavez & Williard 2017) found that pots fitted with a wire mesh chimney led to low mortality of diamondback terrapins Malaclemys terrapin. One of 14 terrapins that were caught in pots modified with the chimney died. Standard commercial crab pots (61 cm × 61 cm × 61 cm) were fitted with a chicken wire chimney (122 × 30.5 cm diameter) to provide trapped terrapins with access to air. Pots were deployed June–July in 2012 (4 sites) and 2013 (2 sites). Pots were baited and submerged for 48 hours at a time.

    Study and other actions tested
Please cite as:

Sainsbury K.A., Morgan W.H., Watson M., Rotem G., Bouskila A., Smith R.K. & Sutherland W.J. (2021) Reptile Conservation: Global Evidence for the Effects of Interventions for reptiles. Conservation Evidence Series Synopsis. University of Cambridge, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

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Reptile Conservation

This Action forms part of the Action Synopsis:

Reptile Conservation
Reptile Conservation

Reptile Conservation - Published 2021

Reptile synopsis

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