盐度对青虾幼虾生长及其异速生长的影响  

Effect of salinity on growth and allometric growth of juvenile Macrobrachium nipponense

作　　者：王泽飞 王文超 周子琦 谢楠[3] 陶贤继[1,2] 冯建彬[1,2] WANG Zefei;WANG Wenchao;ZHOU Ziqi;XIE Nan;TAO Xianji;FENG Jianbin(Key Laboratory of Freshwater Aquatic Genetic Resources,Shanghai Ocean University,Ministry of Agriculture and Rural affairs,Shanghai 201306,China;National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,China;Institute of Fishery Science,Hangzhou Academy of Agricultural Sciences,Hangzhou 310024,China)

机构地区：[1]上海海洋大学,农业农村部淡水水产种质资源重点实验室,上海201306 [2]上海海洋大学,水产科学国家级实验教学示范中心,上海201306 [3]杭州市农业科学研究院水产研究所,杭州310024

出　　处：《淡水渔业》2024年第6期57-63,共7页Freshwater Fisheries

基　　金：上海市科技创新行动计划项目(19391900900)。

摘　　要：为探讨盐度对青虾(Macrobrachium nipponense)幼虾生长及其异速生长的影响,本研究将1月龄青虾幼虾分别养殖在盐度0、7和14的水体中,每隔15 d分别随机抽样90尾并测定个体的体长、体质量等形态性状,计算并比较不同盐度中青虾幼虾生长速度。结果显示:在60 d的养殖过程中,青虾幼虾在盐度0中的平均体长、体质量均显著高于盐度7、14;第15、60天时,青虾幼虾在盐度0中的体长、体质量相对增长率均显著高于盐度7、14;不同盐度梯度下青虾幼虾个体生长速度均存在显著差异,体长、体质量的差异随养殖时间的增加而显著加大,其中盐度0中个体间异速生长差异程度最大,盐度14中个体间异速生长差异程度较小。综上所述,青虾幼虾在不同盐度中均存在异速生长现象,青虾幼虾在盐度14中个体间异速生长最小。A total of 90 one-month-old individuals were randomly selected to investigate the influence of salinity on the growth and allometric growth of juvenile Macrobrachium nipponense.These individuals were exposed to salinity 0,7 and 14.Their total length,body length,weight and abdominal length were measured on the 15 th,30 th,45 th and 60 th days after exposure.The differences in the growth rate of juvenile M.nipponense were analyzed using the different salinity gradients.The results showed that juvenile M.nipponense could grow at salinity 0,7 and 14.Their average body length and weight gradually increased,respectively.The average body length and weight of juvenile M.nipponense at salinity 0 were considerably more significant than those at salinity 7 and 14 over the 60-day aquaculture procedure.In addition,there was a significant correlation between weight and total length,body length and abdominal length.The relative growth rate of body length and weight of juvenile M.nipponense at salinity 0 were significantly higher than those at salinity 7 and 14 on days 15 th and 60 th.There were significant differences in the growth rate of juvenile M.nipponense at the same and different salinities,and the differences in body length and weight increased with time.There was a significant difference in allometric growth between individuals in the fast-growing group(FG)and slow-growing group(SG).The relative growth rates of body length and weight of juvenile M.nipponense at salinity 0 were significantly higher than those at salinity 7 and 14.At salinity 7 and 14,the growth rates of SG were greatly delayed on day 15,but the relative rates of SG were significantly higher than those of FG at salinity 14 on day 60.In conclusion,different salinity gradients can substantially influence the growth rate of juvenile M.nipponense.Juvenile M.nipponense may grow faster in freshwater than at salinity 7 and 14.However,the difference in allometric growth between juvenile M.nipponense at salinity 14 is smaller than at salinity 0 and 7.

关 键 词：青虾(Macrobrachium nipponense) 幼虾 盐度 生长 异速生长 

分 类 号：S945.4[农业科学—水产养殖]