【作者】 尤仲杰； 王一农； 吕朝晖；

【Author】 You Zhongjie Wang Yinong Lu Chaohui (Ningbo Branch of Zhejiang Fisheries College)

【机构】 浙江水产学院；

【摘要】 本文研究了浙江舟山沿海彩虹明樱蛤的生殖周期,结果表明：1月至4月中旬性腺处于增殖期,4月下旬至6月上中旬为生长期,6月下旬至8月下旬为成熟期,7月初至9月底为排放期,10月初至12月底为休止期,该蛤性腺发育一年一个周期,6月底至7月初和8月中下旬为两个产卵高峰。属一次成熟分批排放生殖类型；性成熟年龄为一龄；生物学最小型为壳长10毫米左右；自然海区该蛤种群的性比为雌雄1．1：0．9．更多还原

【Abstract】 This paper deals with the regular the development patterns of gonad and the repro- ductive cycles of MoereUa iridescens (Benson).According to the cytological characteris- tics of the developing sexual cell and the change of the precentage of drain body weight and the preeentage of fresh body weight in different developing periods,the development of gonad can be divided into five stages:(1)proliferation period,(2)growth period, (3)maturation period,(4)spawning period and,(5)resting period. There is two annual spavoring peak in the Zhoushan sea area,from the ends of June to begins of July,and the middle of August.In this paper,also discuss the relations be- tween the gonad development to the Karyoplasmcytoplasm rate of gonad cell.Sone ear- ly-maturing males were found.更多还原