Relation between Ingress, Escape and Height of Pot Entrance

Abstract

In this paper, attention is focused on the relation between the ingress and escape behaviour of prawns and height of pot entrance for the purpose of applying these data to investigate the catching mechanism of a small shrimp pot. The experiments were performed in a tank using six model pots without bait. The behaviour of prawns neaz the entrance funnel was recorded using video camera for a duration of 3hours per experiment. In each case, the variation in the number of individuals in a pot was well defined by the model equation. The relative catching efficiency was at maximum value near 8cm height of pot entrance.