海洋科学2016，Vol.40Issue(8)：35-41,7.DOI:10.11759//hykx20150512001
放养密度对大杂交鲟生长性能的影响及生理应答机制
Effect of stocking density on growth performance and mecha-nism of physiological response in hybrid sturgeon
摘要
Abstract
To study the effect of stocking density on growth performance and mechanism of physiological response in hybrid sturgeon, an experiment was performed on large-sized hybrid sturgeon (Husodauricus♀ ×Acipenser schrenckii♂), with an initial weight of 243 g per fish, at a stocking density of 6 (SD1 group), 9 (SD2 group), 12 (SD3 group), and 15 kg/m3 (SD4 group) over a 70-day period. Results showed that daily weight gain decreased sig-nificantly (P<0.05) with increasing stocking density. Moreover, increasing density resulted in a decrease in specific growth rate and growth efficiency, with the best specific growth rate and growth efficiency in the SD2 group. However, density had an indistinguishable effect on relative fatness. In the study, serum thyroxine (T4), triiodothy-ronine (T3), and cortisol were significantly affected by stocking density. T3 and cortisol levels increased signifi-cantly (P<0.05), whereas the T4 level decreased (P<0.05) over breeding time. The results indicate that the change in neuroendocrine activity affect the serum physiological indices, which can influence growth performance in experi-mental fish. Therefore, we suggest that 9 kg/m3 as an appropriate stocking density for aquaculture.关键词
大杂交鲟(达氏鳇(Huso dauricus)♀×施氏鲟(Acipenserschrenckii)♂)/拥挤胁迫/特定生长率Key words
Hybrid sturgeon/crowding stress/specific growth rate/relative fatness/thyroid hormones/cortisol分类
农业科技引用本文复制引用
张墨,李吉方,温海深,步艳,倪蒙,任远源,来长青,刘传忠..放养密度对大杂交鲟生长性能的影响及生理应答机制[J].海洋科学,2016,40(8):35-41,7.基金项目
公益性行业(农业)科研专项经费资助项目(201003055)@@@@Special Fund for Agro-scientific Research in the Public Interest, No.20103055。 （农业）
