摘要
研究了盐度波动幅度对中国明对虾稚虾(Fenneropenaeus chinensis)蜕皮和生长的影响.实验在水族箱内进行,实验对虾的初始体重为(0 553 2±0 000 1)g,投喂人工配合饲料.实验结果表明:(1)不同盐度波动幅度对中国明对虾稚虾的蜕皮周期有显著的影响(P<0 05),其中S10 能明显抑制对虾的蜕皮,S2则能促进对虾的蜕皮,前者较后者蜕皮周期延长4 97 d;(2)不同盐度波动幅度对中国明对虾的特定生长率有显著影响(P<0 05),其中,S4 和S7 两组对虾的特定生长率最大,分别大于S0组28 11%和22 36%,并且与S0 和其他处理组相比差异均达到显著水平(P<0 05);(3)不同盐度波动幅度对中国明对虾的摄食量有显著影响(P<0 05),S4 和S7 两组分别高于S0组15 96%和11 46%;(4)不同盐度波动幅度对中国明对虾的食物转化效率未产生显著的影蚐7两组对虾的食物转化效率较高.
Experiments were conducted to examine the effects of salinity fluctuation on intermolt period and growth of Fenneropenaeus chinensis with initial body weight of (0.5532±0.0001)g.The salinity of the control treatment (S0) was 30 throughout the experiment, while the Treatments S2, S4, S7 and S10 were subjected to different salinity fluctuations, and the ranges were 2, 4, 7 and 10, respectively. After the (30 d) feeding trial, the longest and the shortest intermolt period of the shrimp occurred under the Treatments S10 and S2, respectively (difference 37.14%). The special growth rates of the shrimp under five treatments were as follows: S7>S4>S2>S10>S0, and the special growth rate of the shrimp under Treatment S0 was lower than that under Treatments S4 and S7 by 22.36% and 28.11%,respectively (P<0.05). The minimal feed intake of the experimental animal occurred in Treatment S0 (84.04% and 88.54% of that under Treatments S4 and S7, respectively) (P<0.05). There were no significant differences among food conversion efficiency of the shrimp under the five treatments (P>0.05).
出处
《海洋学报》
CAS
CSCD
北大核心
2005年第2期122-126,共5页
基金
国家重点规划资助项目(G1999012011)
国家"十五"科技攻关资助项目(2001BA505B)
国家"863"资助项目(2002AA648010)
