摘要
以水族箱中生长的囊螺为材料,通过连续观察的方法,对囊螺的繁殖习性和胚胎发育过程进行了观察。试验结果表明,囊螺为雌雄同体、异体受精的种类,但也可以自体受精。囊螺膜内胚胎发育经受精卵、卵裂、囊胚、原肠胚、担轮幼虫、面盘幼虫和匍匐幼虫等7个阶段,孵化后变成稚螺。
The reproductive behavior and embryonic development were successively observed in conch Physa acuta cultured in the aquaria. It was found that the conch was hermaphroditism and cross-fertil ized, sometimes self-fertilization. The embryonic development was divided into seven stages： zygote, cleavage, blastocyst, gastrulation, trochophora, veliger and the crawling larvae, which metamorphosed into juveniles after hatching.
出处
《水产科学》
CAS
北大核心
2009年第10期594-597,共4页
Fisheries Science
关键词
囊螺
繁殖习性
胚胎发育
Physa acuta
reproductive behavoir
embryonic development
