In order to determine the suitability of the minimum mesh size of stow net in the South China Sea,the selectivity of codend mesh of double stake net was studied by using covered net method in Huangmaohai Estuary in April and August of 2015. Coilia mystus is the main fishing target in the area by the index of relative importance( IRI). Using the catch data of the fishing target,different mesh sizes selectivity curves of them have been drawn by using Logistic curves as a selectivity model. Parameters of selec...