Wetlands Australia Journal, Vol 23, No 2 (2006)

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A cautionary note: temporal effects on the capture of mangrove crabs by pitfall traps

Tansy Boggon

Abstract


This study suggests an effect of temporal variation on the capture of mangrove crabs by pitfall traps. More crabs, and less consistently, more species were captured during a period with rainfall than a dry period. These results have important implications for methods used to sample mangrove crabs that are dependent on the activity of crabs such as pitfall traps, visual counts and hand-catches. Future studies that use these methods need to consider the effect of weather on the catchability of crabs and take into account these effects when interpreting data.

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