摘要
根据唐鱼（Tanichthys albonubes）发育过程特征，胚后发育可以分为孵出期、胸鳍形成期、鳔一室期、卵黄消失期、尾鳍分化期、背鳍分化期、鳔二室期、背鳍形成期、臀鳍形成期、腹鳍形成期、稚鱼期、幼鱼期和成鱼期。在水温23．0～29．0℃条件下，初孵仔鱼体全长为（2．760±0．002）mm。孵出后3天，巡游模式建立，仔鱼开口摄食；5天仔鱼卵黄耗尽，完全依赖外源营养；9天尾鳍开始分化，12天尾脊索上弯；15～18天，背鳍褶突起明显，鳍条原基出现；18天第二鳔室出现，肌节开始向“W”过渡；臀鳍与背鳍分化；33天，20％的仔鱼可观察到腹鳍条；45天，57．1％仔鱼身体长出鳞片；50～55天．体全长（15．62±1．65）mm，腹膜闭合，身体透明特点消失，进入幼鱼期。77天，部分性成熟较早的个体开始进行繁殖。同时文中讨论了唐鱼胚后发育特点及其保护生物学。
Tanichthys albonubes, a cyprinid fish belonging to Danioninae, endemic fish in South China, mainly distributed in Pearl River Delta. Due to habitats destroying, they have been an endangered species since 1980s,and have been recorded in Endangered Species Red Book（Fish）, classified as national protected species,grade II. In this study the post-embryonic development of T. albonubes was researched. The larvae were reared under the conditions below： water temperature 23.0- 29.0 ℃ ;light recycling L：D = 16 h：8 h and light intensity 680 - 783 lx, feed Paramoecium caudatum, microcapsule diets and Tendipes spp. according to its development stages. The results indicate that the total length of hatching larvae are（2.760 ± 0.002） mm. Three days after hatching, patrol swimming is built, and the larvae begin to feed. Five days after hatching, the yolk-sac is exhausted and the larvae completely live on preying; the muscle node is shaped like V. Nine days after hatching, caudal tip lifting stage begins. Twelve days after hatching, the larvae tail notochord become askew up. The back fin ply heaves obviously and fin anlage appears when 15 - 18 days after hatching, the total length is（5. 868 ± 0. 388）mm. Eighteen days after hatching, the second chamber air bladder is formed. Anal fin stage begins at the same time of dorsal fin formation stage. Thirty-three days after hatching, the bud of ventral fin appears;and about 20 % of larvae having pelvic fin can be observed;the total body length of larvae is（ 11.173±0. 539） mm. Forty-five days after hatching, about 57.1% of larvae have scales;the total length is（ 14.45 ±2.24）mm. Fifty to fifty-five days after hatching, the total body length is （15.62 ± 1.65）mm;the scale covers the whole body of larvae which means the beginning of young stage. Seventy-seven days after hatching, some young fish become mature and they can reproduce. The characteristics of post-embryonic development and the conservation of T. albonubes were discussed in this paper.
出处
《中国水产科学》
CAS
CSCD
北大核心
2006年第6期869-877,共9页
Journal of Fishery Sciences of China
基金
农业部渔业生态环境重点开放实验室开放基金(20059)
广东省渔业生态环境重点开放实验室开放基金资助(2005-09)
广东省科技计划项目资助(2004B40101015)
关键词
唐鱼
胚后发育
保护生物学
Tanichthys albonubes
post-embryonic development
conservation
