池养2龄伊河团头鲂春季发育成熟度和怀卵量检测

The analysis of sexual maturity and fecundity of Megalobrama amblycephala in Yi River of two years cultured in ponds in spring

在池塘养殖环境下,检测2龄伊河团头鲂春季性腺发育程度,发现4月底2龄伊河团头鲂部分雄性个体精液可以自然流出。5月中旬雌性性腺成熟系数最高可达14.00%,平均成熟系数为8.85%,达到人工催产条件,雌性相对怀卵量均大于150粒/g,平均达到180粒/g。

In spring, the developmental condition of the gonad for Megalobrama amblycephala in Yi River of two years cultured in ponds was detected. Semen of the male flowed from the fish body easily in late April. The gonadal maturity coefficient of the female was 14% （average 8.85%） in the middle of May, which showed that parent fish reached the condition for artificial induced spawning. The individual relative fecundity was above 150 eggs/g（average 180 eggs/g）.