羊鲍胚胎发育的显微观察

Microscopic Observation of Embryonic Development of Abalone

为掌握羊鲍个体发育的生命活动规律,在显微镜下对羊鲍(Haliotis ovina)的整个胚胎发育过程进行了形态学的观察。观察结果为羊鲍成熟卵呈球形、米黄色,平均卵径为(0.19±0.02)mm。在海水盐度32,水温28℃的条件下,羊鲍完成胚胎发育历时约390 min,所需总积温为156~182℃·h^(-1)。通过对羊鲍胚胎发育形态与特征观察,将其胚胎发育过程分为受精卵阶段、卵裂阶段、原肠胚阶段、担轮幼虫阶段等4个阶段,共11个发育时期。其发育时间比适宜条件下皱纹盘鲍快约1 h,比杂色鲍、耳鲍慢。

The embryonic developmental process of Haliotis ovina in the seas of China were observed microscopically to understand the life activity of H. ovina in ontogenesis. Observations showed that H. ovina mature eggs were spherical and beige,with an average egg diameter being（ 0. 19 ± 0. 02） mm. In the sea water under the salinity of 32 ‰ and water temperature of 28 ℃,it took 390 min for H. ovina to hatch from fertilization,with an average cumulative temperature of 156- 182 ℃ ·h^-1. Morphological and characteristic observations showed the embryonic development process could be divided into 4 stages,fertilized egg stage,cell division stage,gastrula stage and trochelminth larval stage,and 11 development periods. H. ovina developed embryonically about 1hour faster than Haliotis discus hannai developing under suitable conditions but slower than H. diversicolor and H. asinine.