渤海矛尾复鰕虎鱼生殖力的研究

从渤海采集卵巢发育到Ⅳ和Ⅴ期的矛尾复鰕虎鱼32尾,采用重量法进行了生殖力的研究。结果表明:矛尾复鰕虎鱼为分批产卵类型,卵子呈卵圆型,卵径0.726mm±0.291mm;矛尾复鰕虎鱼的个体绝对生殖力为33 609±14 022粒,单位净体重生殖力为439.92±139.50粒/g,单位体长生殖力为1 176.08±227.08粒/mm。矛尾复鰕虎鱼个体绝对生殖力与体长、体宽、体重、净重、性腺重及肥满度相关关系密切,而与成熟系数相关关系不密切;体长相对生殖力与除成熟系数以外的其他生物学指标相关关系一般,与成熟系数相关关系不密切;净重相对生殖力与体长、体重、净重、性腺重、肥满度关系密切,与其他生物学指标相关性不强。

The Study on Fecundity of Synechogobius hasta in Bohai

32 specimens that ovaries developed to IV, V period were collected in Bohai, fecundity was studied by weight method; The results showed that：Synechogobius hasta was the batchspawner, the egg was oval type, ,egg diameter was 0. 726±0. 291 mm. The individual absolute fecundity of Syne- chogobius hasta was 3609±14022eggs,the fecundity per net body weight was 439.92± 139.50eggs/g, the fecundity per body length was 1176.08±227.08 eggs/ mm. The individual absolute fecundity of Synechogobius hasta presented closely positive relationship with body length, body wedth, body height, body weight,net body weight and relative fatness, poor relationship with maturity coefficient ; the fecundity per body length had moderate relationship with other biological indicators but maturity coefficient,poor relationship with maturity coefficient; the fecundity per net body weight had closely relationship with body length, body weight, net body weight, gonad weight and relative fatness, poor relationship with other biological indicators.