Square mesh codend improves size selectivity and catch pattern for Trichiurus lepturus in bottom trawl used along Northwest coast of India

The size selectivity and catch pattern of Trichiurus lepturus in 40 mm diamond square mesh codends were investigated this study. A 34 m high opening trawl was used, which is a common design used by fishermen operating along the northwest coast India, cover codend method employed to determine selectivity. Along with changes length at 50% retention rate for usage codends, indicators understand exploitation species fishery assessed based on total number individuals weight catch. mean selection increased discard fraction reduced when are place meshes, however, it observed that commercial also lost. results demonstrate mandatory use legal sizes alone will be insufficient aid sustainable harvest species, given its estimated first sexual maturity 61.2 cm. This study compare Northwest India. Results help as baseline gear-based regulations region.