Mesh Selectivity Curves of a Shrimp Beam Trawl for Southern Rough Shrimp Trachypenaeus curvirostris and Mantis Shrimp Oratosquilla oratoria

Abstract

The purpose of this work is to determine the mesh selectivity curves of a shrimp beam trawl for two shrimps, southern rough shrimp and mantis shrimp. A covered-net fishing experiment is carried out of a shrimp beam trawl with codends of six meshsizes. The covernet has no effect on number, weight and size distribution of catch in codend in this fishing experiment. The respective mesh selectivities are estimated for the two shrimps. Through Tokai and Kitahara's method, we determine the mesh selectivity master curves for the two shrimps. The respective master curves for the two shrimps can give the mesh selectivity curves of a specified mesh size for them.