水产学报2012，Vol.36Issue(7)：1088-1093,6.DOI:10.3724/SP.J.1231.2012.28029
养殖密度对克氏原螯虾幼虾生长、消化酶活力和生理生化指标的影响
Effects of stocking density on growth, digestive enzyme activities and biochemical indices of juvenile Procambarus clarkii
摘要
Abstract
Stocking density is a crucial factor involved in aquatic productivity. This paper evaluates the effects of stocking density on growth, digestive enzyme activities and biochemical indices of juvenile Procambarus clarkii, whose initial average body weight was (0.015±0.004) g. A 30-day rearing experiment was conducted at the stocking densities of 50, 100, 300, 600, and 900 individuals/ m2. Results showed that the final body weight of juvenile P. clarkii decreased with the increasing stocking density. The activities of pepsin, tryptase, and amlase presented the reduced trend with the increasing stocking density, while cellu-lase, lipase, and the content of moisture were indistinctly changed (P ＞ 0.05). The content of crude protein increased from 54.02% to 60.75% (P ＜ 0.05), and also, muscle concentrations of triglyceride, total protein, urea nitrogen, and cholesterol increased (P ＜ 0.05) with the increasing stocking density, while the content of crude fat decreased from 26.19% to 19.19% (P ＜ 0.01) , and concentration of glucose in muscle in the same manner. Increasing trends of hepatopancreas concentrations of glucose, triglyceride, total protein, and urea nitrogen with the increasing stocking density were observed. These data indicate that high stocking density exerts a negative impact on the growth and digestive enzymes of juvenile Procambarus clarkii, and could alter the contents of protein, fat, glucose, and urea nitrogen.关键词
克氏原螯虾/养殖密度/消化酶/生化成分/生理指标Key words
Procambarus clarkii/ stocking density/ digestive enzyme/ biochemical composition/ physiological indices分类
农业科技引用本文复制引用
肖鸣鹤,肖英平,吴志强,胡向萍..养殖密度对克氏原螯虾幼虾生长、消化酶活力和生理生化指标的影响[J].水产学报,2012,36(7):1088-1093,6.基金项目
江西省农业厅农业科技项目(0603-1) （0603-1）
