棘颊雀鲷的胚胎发育形态学研究

Study on the Morphological Characteristics of Embryonic Development of Premnas biaculeatus

[目的]了解棘颊雀鲷的发育特点和生理生态条件。[方法]在水温(26±1)℃、盐度(25±1)的实验室条件下对棘颊雀鲷受精卵的发育过程进行研究。[结果]棘颊雀鲷受精卵呈椭圆形,根据其胚胎发育过程的形态特征分为10个阶段:卵裂前期、卵裂期、囊胚期、原肠期、神经胚期、体节期、翻转期、血管形成期、器官形成期、孵化期;受精卵长径1.99mm,发育过程中受精卵的颜色逐渐加深,孵化期以后颜色变浅至透明;在水温26℃条件下受精卵历时154 h孵出,初孵仔鱼全长(3.6±0.1)mm。[结论]该研究可为棘颊雀鲷人工育苗生产提供理论依据。

[ Objective ] The research aimed to understand the development characteristics and physiological and ecological conditions of Premnas biaculeatus. [ Method] The development process of P. biaculeatus oosperm under the laboratory conditions of （26 ＋ 1 ） ℃, salinity of （25 ＋ 1 ） was studied. [ Result] The oosperm of P. biaculeatus was oval. According to the morphological characteristics, the embryonic development process was divided into 10 stages ： per-cleavage stage, cleavage stage, blastula stage, gastrul stage, neurlua stage, somite stage, turnover stage, angiogenesis stage, organ formation stage and hatching stage. The long diameter of oosperm was 1.99 mm, the color of oosperm in the develop- ment process was gradually deepened. The oosperm of P. biaculeatus took about 154 h to complete the whole incubation period at water tempera- ture of 26 ℃. The whole length of newly-hatched larvae was （3.6 ±0.1 ） ram. [ Conclusion] The research could provide theoretical basis for the artificial production of P. biaculeatus.