长江鳡胚胎及仔鱼发育研究  

Embryonic and larval development of yellowcheek carp Elopichthys bambusa in the Yangtze River

作　　者：任丽珍[1] 程利民[1] 韩晓磊[1] 徐慧君[1] 许璞[1] 徐建荣[1] 

机构地区：[1]常熟理工学院长江特色水产工程技术中心,江苏常熟215500

出　　处：《大连海洋大学学报》2011年第3期215-222,共8页Journal of Dalian Ocean University

基　　金：江苏省科技厅项目(BC2006337);苏州市科技局项目(SZG0702);江苏省海洋渔业局项目(K2008-4)

摘　　要：以人工繁殖所得受精卵为材料,采用显微照相技术对长江鳡Elopichthys bambusa胚胎及仔鱼发育过程进行观察,并对不同发育时期的形态特征进行了描述和拍照记录。实验结果显示:长江鳡的受精卵为圆球形,卵径为3.5～4.0 mm,吸水膨胀后卵径为12.5～14.5 mm,为非黏性漂流性卵;胚胎发育可分为胚盘、卵裂、囊胚、原肠、神经胚、器官分化和出膜7个阶段;仔鱼的发育分为卵黄囊期和晚期两个阶段。以长江水为培养用水,水体温度为22～25℃条件下,长江鳡的受精卵历时27 h 45 min孵出仔鱼,其总积温为663℃·h;水体温度为26～29℃条件下,长江鳡仔鱼发育历时30 d。The embryonic and larval development were observed and described in yellowcheek carp Elopichthys bambus induced to spawn by hormone injection and artificial fertilization under a stereomicroscope. The results showed that the fertilized eggs were spheroid in shape, unsinkable, and unglutinous, and have an average diameter from 3.5 mm to 4.0 mm, 12.5-14.5 mm after expanded in water. The embryonic development can be divided into 7 stages, including blastodisc, cell cleavage, blastula, gastrula, neural stage, organogenesis and hatching, and the larval development can be classified into 2 stages, including yolk period and advanced period. The larvae were hatched 27 hours and 45 minutes after fertilization in Yangtze River at water temperature of 22-25 ℃ ,with total accumulative temperature of 663 ℃ .h. The larval development lasted for 30 days at water temperature of 26-29 ℃.

关 键 词：鳡 受精卵 胚胎发育 仔鱼发育 

分 类 号：Q959.46[生物学—动物学]