【摘要】 有关单环刺发育周期的研究，国内外迄今未见专门报道。本文报道了烟台沿岸单环刺早期胚胎发育、各期幼虫形态标志、幼和成的形态特征的研究结果。更多还原

【Abstract】 This paper presents the results of study on the life history of Urechis unicinctus(Von.Draschi). The spawning season of Urechis unicinctus in the Huanghai Sea (Yantui)was found in March -May. Fertilization and development was Performed in the laboratory at water temperature of 16. 5-23 degree C. The sequence of the embryonic development and larval development is summarized as follows.更多还原