Abstract:Growth, distribution and abundance of released Fenneropenaeus orientalis were studied based on the data collected in the Bohai Sea from May to October in 2009. The collection and statistics of total yield of F. orientalis was carried out by the provincial institutes at the end of October. Results showed that the released F. orientalis mainly distributed in the shallow water (1-2 m) and estuary areas in mid June, and distributed at the depth of 5-18 m at the end of July, especially 10-15 m. The mean weight of F. orientalis were 2.5 g in mid June, and reached 7.0 g from the beginning to mid July, 20.0 g from the end of July, 27.0 g from the end of July to the beginning of August, 36.0 g in mid August and 41.0 g at the beginning of September. Based upon the survey data, the estimated biomass of F. orientalis in the Bohai Sea was 1 665 tons in August and reduced to 137 tons in October after being captured. The abundance of F. orientalis in the bays of the Bohai Sea was 129.9, 7.8, 0.3, and 0.05 ind/net•h respectively, which were positively related to the released numbers. Based on the collection and statistical data, the total yield of F. orientalis in the Bohai Sea was 2 377 tons and the estimated recapture ratio was 2.8% in 2009.
