Composition of shrimp and crab of shrimp beam trawl in coastal sea of Zhanjiang

We conducted fishery survey in northern South Sea in August 2012 to investigate the composition of shrimp and crab of shrimp beam trawl fisheries. The composition, biological characteristic and ratio of the unmatured were analyzed. The results indicated that there were 71 species, in which there were 15 species of shrimp and crab, accounting for 82.34% to the total output. The dominant species of shrimp were Marsupenaeus japonicus, Metapenaeus ensis, M. affinis and M. joyneri; the dominant species of crab were Portunus sanguinolentus, P. trituberculatus and P. pelagicus; the ratio of unmatured M. ensis was 73.36%, and that ratio of P. trituberculatus was 78.79%. Finally, the measures to rationally use the shrimp and crab resources were discussed.