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Experimental studies on intensive polyculture of Chinese shrimp with bay scallop

Wang Jiqiao (Dalian Fisheries College, 116023) Li Deshang Dong Shuanglin Wang Kexing Tian Xiangli (Ocean University of Qingdao, 266003)  
Stocking performance, productivity and up limit carrying amount in an intensive polyculture of Cinense shrimp(Penaeus chinensis)with bay scallop(Argopecten irradians)were investigated by using 8 enclosures, each 5.0 m×5.0 m×1.8 m, fitted in a closed 1.7 hm 2 seawater pond in 1996. The Chinese shrimp and juvenile bay scallop were bred mixed in the enclosures at a density of 6.0 shrimp/m 2 and 0, 1.5,4.5 and 7.5 scallop/m 2,respectively, and reared with commercial feed,chicken manure and chemical fertilizer.There was no significant difference in survival rate of Chinese shrimp between 0 and 1.5 scallop/m 2; the mean final body length, body weight and yield of shrimp decreased with the increasing of stocking density of bay scallop significantly(P0.05).The yield of the bay scallop incresaed from 470 kg/hm 2 at 1.5 scallop/m 2 to 1 236 kg/hm 2 at 7.5 scallop/m 2. However, the percentage of wet soft tissue weight in total wet weight decreased from (42.84±3.44)% at low scallop density to (37.88±4.26) % at high scallop density. The results indicate that the up limit carrying amount of scallop is 600~ 800 kg/hm 2 and the optimum stocking density of scallop is 1.0 scallop/m 2.
【CateGory Index】: S968.3
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