厚壳贻贝胚胎发育观察

目的]研究厚壳贻贝的胚胎发育情况。方法]选择性腺成熟的厚壳贻贝亲贝,通过催产受精,对厚壳贻贝受精、卵裂、幼体发育等细胞生物学现象用显微镜进行连续观察,经显微摄影,详细记录了厚壳贻贝的胚胎发育全过程。结果]厚壳贻贝亲贝经阴干刺激,排出精卵,获得成熟受精卵,直径约75μm,在水温13~20℃的条件下,受精卵分裂,经过桑椹期、囊胚期、原肠期、担轮幼虫、D形幼虫、壳顶幼虫、匍匐幼虫等阶段,最后变成附着稚贝,其胚胎发育的全过程历时35 d。结论]厚壳贻贝亲贝暂养温度要适当,一般在10℃左右。厚壳贻贝胚胎发育的时间与水温密切相关,其适宜温度为13~20℃,并由受精卵开始发育时相对较低的温度逐步升高。

Observation on Embryonic Development of Mytilus coruscus

Objective] The study aimed to investigate the embryonic development of Mytilus coruscus.Method] The parent scallops of the M.coruscus with matured sex gland were selected to be fertilized through hasten parturition,the cell biology phenomena such as the fertilization,segmentation of ovum and larval development were made for the continuous observation by the microscope and the whole process of embryonic development of M.coruscus was recorded in detail through microscopic photography.Result] The parent sca...