摘要
2011年7月至2012年6月,对五强溪水库太湖新银鱼不同繁殖群体的生长特性进行了比较研究.用von Bertalanffy生长方程描述其生长特性,得到不同群体的体长-体重关系式分别为：春群W=0.003 4 L^3.027 2（n=538,r=0.956 6）,秋群W=0.001 7 L^3.379 1（n=590,r=0.958 5）,由此表明该水库太湖新银鱼属于等速生长类型;并由生长方程推导出体长和体重的生长速度方程及生长加速度方程,得出太湖新银鱼春群的生长拐点为5.77月龄,秋群的生长拐点为3.97月龄,确定五强溪水库太湖新银鱼的合理捕捞期为9~10月.
In this study,the comparison of growth characteristics of two Neosalanx taihuensis populations was conducted in Wuqiangxi reservoir in July,2011 to June,2012. Analysis indicates that its month age suits to von Bertalanffy growth formula. The equations are： the spring-stock W = 0. 003 4 L3. 027 2（ n = 538,r = 0. 956 6）,the autumn group W = 0. 001 7 L3. 379 1（ n = 590,r = 0. 958 5）. The results suggested that the fish was isometric velocity growth type. And by the growth formula,the growth rate formula and accelerative growth rate formula of body length and body weight were deduced out. Growth point of inflection sites at 5. 77 month age of the spring-stock,while the growth point of inflection sites at 3. 97 month age of the autumn group. These results confirmed that the suitable fishing period is within September to October.
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2015年第5期35-39,共5页
Journal of Natural Science of Hunan Normal University
基金
湖南省科技计划资助项目(2013WK3028)
关键词
太湖新银鱼
生长特性
五强溪水库
Neosalanx taihuensis
growth characteristics
wuqiangxi reservoir
