中国水产科学2011，Vol.18Issue(2)：322-328,7.DOI:10.3724/SP.J.1118.2011.00322
密度胁迫对点带石斑鱼幼鱼生长、代谢的影响
Effects of density stress on growth and metabolism of juvenile Epinephelus malabaricus
摘要
Abstract
A 6-week feeding trail was conducted to study the effect of density stress on growth performance,plasma cortisol, blood glucose and activities of related enzymes of juvenile Elineophelelus malabaricus. Three hundred juveniles, body weight (15±0.5) g were randomly distributed in 4 experimental groups: G10 (10 ind/tank,1.1 kg/m3), G20 (20 ind/tank, 2.1 kg/m3), G30 (30 ind/tank, 3.2 kg/m3), and G40 (40 ind/tank, 4.2 kg/m3). The results showed: (1) weight gain (WG) and specific growth rate (SGR) of G10 were the lowest among the experimental groups, and WG and SGR of G20 were the highest. Feed conversion ratio (FCR) increased with the increase of density. (2) No significant difference was observed in plasma cortisol levels between G30 and G40 (P ＞0.05),plasma cortisol levels of G10 and G20 were significantly lower than those of G30 and G40 (P ＜0.05), and plasma cortisol level of G10 was the lowest. Similar trend was recorded in blood glucose levels. (3)Glutamic pyruvic transaminase (GPT) activities of G30 and G40 were significantly higher than those of G10 and G20; glutamic oxaloacetic transaminase (GOT) activities and lactic dehydrogenase (LDH) activities increased with the increase of the stocking density, total choline esterase (TChE) activities decreased with the increase of the stocking density.Hence, too high or too low stocking density would affect the growth performance and metabolism of juvenile Epinephelus malabaricus, and 20 ind/tank (2.1 kg/m3) was considered to be a suitable stocking density.关键词
点带石斑鱼/密度胁迫/生长/代谢分类
农业科技引用本文复制引用
逯尚尉,刘兆普,余燕..密度胁迫对点带石斑鱼幼鱼生长、代谢的影响[J].中国水产科学,2011,18(2):322-328,7.基金项目
江苏省海洋生物学重点实验室主任基金项目(JSK008-01). （JSK008-01）
