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《Journal of Shanghai Fisheries University》 2008-01
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The effects of water current on growth and survival of Litopenaeus vannamei juveniles

DAI Xi-lin,ZANG Wei-ling,ZHANG Tao(Key Laboratory of Aquatic Genetic Resources and Aquacultural Ecology Certificated by the Ministry of Agriculture,Shanghai Fisheries University,Shanghai 200090,China)  
The effects of water current and velocity of horizontal flow on growth and survival of Litopenaeus vannamei juveniles were studied.The results indicated: The water current,direction of flow and velocity of horizontal flow were the most important environmental factors of affecting growth and survival of Litopenaeus vannamei juveniles.The still water environment was unfavorable to life and growth of juveniles,and easy to cause juvenile's body irregularity.Horizontal water current and aerated vertical water current promoted the growth and survival of the shrimp both.Especially,horizontal water current was very favorable to shrimp growth,shrimp body regularity and shrimp survival.In the 0.63-2.78 mm/s range of velocity of horizontal flow,with velocity of flow speeding up,the shrimp growth speed increased and the shrimp body became more regular.There were significant differences among the means of the increment of body length and weight and survival rate of Litopenaeus vannamei juvenile respectively living in calm water,horizontal water current and aerated vertical water current by F-test.2.78 mm/s of velocity of horizontal flow was optimal growth and survival of 1-3 cm Litopenaeus vannamei juveniles.
【Fund】: 上海市科技登山行动计划重点攻关项目[2006(063919112)];; 上海市重点学科建设项目(Y1101)
【CateGory Index】: S917.4
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