Evaluation of trap density and type for harvesting crawfish Procambarus spp. from small ponds.

摘要

Harvested crayfish were stocked into 0.15 ha earthen ponds in March and May at rates of 114, 227, and 455 kg/ha to evaluate the effects of trap density, 27 and 54 traps/ha, on their recapture over 14 d following 3 d of acclimation. Two-funnel, stand-up pillow traps and 3-funnel pyramid traps were compared. About 39% and 55% of stocked crayfish were recovered in March and May, respectively. There was considerable growth of those crayfish. Overall catch with both trap densities was equivalent in March but the higher trap density caught 1.3 times more crayfish in May. Pyramid traps caught 1.5-1.9 times more crayfish than pillow traps.