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机构地区:[1]青岛海洋大学,青岛266003
出 处:《中国水产科学》1999年第4期49-54,共6页Journal of Fishery Sciences of China
基 金:国家自然科学基金!(39430150);国家攀登计划B 专题!(PD- B6 - 7 - 3);国家九五攻关计划专题!(96 - 922
摘 要:采用海水陆基围隔实验法探讨以对虾为主的中国对虾( Penaeus chinensis) 、罗非鱼( O.mossabicus×O.niloticus) 和缢蛏( Sinonovacula constricta) 投饵混养的最佳结构及N、P 的利用率等,并比较其养殖效果。结果表明,对虾的成活率、规格和净产量分别为70 .74 ~81 .95 % 、9 .16 ~10 .21 g/ind 和485 .4 ~567 .6kg/hm2 ;罗非鱼的出塘规格和净产量为202 .4 ~242 .5 g/ind 和66 .9 ~191 .9 kg/hm2 ;缢蛏的出塘规格和净产量分别为5 .23 ~6 .12 g/ind 和140 .4 ~456 .5 kg/hm2 。最佳结构与放养个体数的配比为对虾7 .21 ind/m2( 体长2 cm 左右) 、罗非鱼( 体重150 g 左右)0 .08 ind/m 2 和缢蛏( 壳长3 cm 左右)14 ind/m2 组,其N、P的总利用率为23 .39 % 和14 .66 % 。The studies were designed and conducted to optimize the structure of the tri-elemented polyculture system,Chinese penaid shrimp(Penaeus chinensis) together with Taiwan red tilapia(Oreochromis mossabicus×O.niloticus) and constricted tagelus(Sinonovacula constricta), and to compare their ecological efficiencies. The experiments were conducted with land-based experimental enclosures setting in one pond,in which shrimps were stocked at a single density of 7.2 ind/m 2,but fish and shellfish were stocked at six different combinations,0∶20 ind/m 2,0.08∶14 ind/m 2,0.12∶10 ind/m 2,0.16∶7 ind/m 2, 0.24∶0 ind/m 2 and 0∶0 ind/m 2. The results showed that the survival rate,final size and net production of shrimp were 70.74%~81.95%,9.16~10.21 g/ind and 485.47~567.6 kg/hm 2 respectively; the final body weight and net production of tilapia were 202.4~242.5 g/ind and 69.0~191.9 kg/hm 2, and those of constricted tagelus were 5.23~6.12 g/ind and 140.4~456.5 kg/hm 2, respectively.The treatment giving a best culturing benefit was considered as the optimum structure of the system. The optimum structure was juvenile shrimp(body length 2 cm) 7.2 ind/m 2, tilapia fingerling(body weight 150 g) 0.08 ind/m 2 and constricted tagelus(body length 3 cm) 14 ind/m 2. The total conversion efficiencies of N and P in the system were 23.39 % and 14.66%.
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