舟山近海凤鲚个体繁殖力的研究

对采自舟山近海凤鲚样品的个体繁殖力及其与生长指标的关系进行研究和分析。结果表明:凤鲚的个体绝对繁殖力r为2816~22813粒,其相对繁殖力r/L和r/W分别在27~122粒/mm和516~1002粒/g;绝对繁殖力r和相对繁殖力r/L都随着鱼体体长、体重和年龄的增加而增大,而相对繁殖力r/W比较稳定,与以上三个生长指标关系不显著。其中个体绝对繁殖力与体长呈曲线相关,与体重和纯重呈线性相关。

The Individual Fecundity of Coilia mystus (Linnaeus) in the coastal waters of Zhoushan

This article studies and analyzes the relationship between individual fecundity and growth index of Coilia mystus in the coastal waters of Zhoushan.The results are summarized as follows: The individual absolute fecundity of Coilia mystus is between 2816 and 22813 eggs and the individual relative fecundity r/L and r/W is 27~122 eggs/mm and 516 ~1002 eggs/g respectively; r and r/L increase according to the increase of fish body length,body weight and age,but the individual relative fecundity r/W is more steady,the relationship between r/W and the above three growth indexes is not obvious.The absolute individual fecundity is curvilinear correlative to body length,and is linearly and directly correlative to body weight and net body weight.