【摘要】 根据 1 994～ 1 998年采集的 85 1个样品研究 ,结果表明 :山东北部近海栉江珧卵巢成熟度依据外部形态观察、切片镜检、卵子结构分析、卵径测量和成熟系数计算等分为Ⅰ～Ⅵ期。生殖腺周年内成熟一次 ,并存在形成、增殖、成熟和休止 4个阶段。产卵期 6～ 8月 ,盛期在 7月上旬～ 8月中旬 ,性成熟年龄 1龄 ,性比 5 3.5 0∶46 .5 0 ,个体繁殖力 1 73.1 0～ 5 381 .5 9万粒 ,单位卵巢重繁殖力 2 84.41万粒 /g。更多还原

【Abstract】 The reproductive biology of pen shell,Pinna Pectinata , in the northern offsea of Shandong were studied based on 851 samples caught from 1994 to 1998. The results showed that: The ovarian condition is divided into 6 maturation stages according to the morphologic character of ovary, gonadosomotic index,ova diameter, and ova structure. The gonad muturates once a year and can be divided into 4 phases, that is evolution, proliferation, muturation, and rest. The spawning period is from June to August. and the peak period is from the first ten days of July to middle of August. The mutured age is one year. The sex radio is 53.50∶46.50.The individual absolute fecundity is ranged from 1731.0 to 53815.9 thousand. The fecundity per gonad weight is 2844.1 thousand/g in average.更多还原