| 雅鲁藏布江尖裸鲤胚胎和仔稚鱼发育的研究 |
| Embryonic and larval development of Oxygymnocypris stewartii in Yarlung Zangbo River |
| 投稿时间：2011-01-15 修订日期：2011-01-15 |
| DOI： |
| 中文关键词:尖裸鲤 胚胎发育 仔稚鱼发育 雅鲁藏布江 |
| 英文关键词:Oxygymnocypris stewartii embryogenesis yolk-sac larval development Yarlung Zangbo River |
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| 中文摘要: |
| 尖裸鲤(Oxygymnocypris stewartii)成熟卵呈圆形,黄色,沉性,卵径(2.57±0.07)mm,受精卵吸水充分膨胀后卵径为(3.22±0.07)mm。水温9.5～11.8℃,尖裸鲤胚胎发育历时265h,根据胚胎发育的外部形态及典型特征,将其分为受精卵、胚盘形成、卵裂、囊胚、原肠、神经胚、器官分化和孵化共8个阶段、32个时期。出膜仔鱼全长(10.27±0.15)mm,出膜20d后卵黄耗尽,全长(15.22±0.27)mm。出膜后80d,鱼苗全长(23.65±0.59)mm,臀鳞出现,各鳍均已出现,鱼苗侧线全部形成且清晰,体色和体型接近成鱼。尖裸鲤早期发育的特点反映了其对雅鲁藏布江水域的适应性。报道了尖裸鲤胚胎发育和仔稚鱼发育的生物学特性,为雅鲁藏布江特有鱼类资源保护利用提供科学依据和理论基础。 |
| 英文摘要: |
| This study was performed to describe for the first time the embryogenesis and the yolk-sac larval development of Oxygymnocypris stewartii that inhabits the cold food-impoverished habitats in Yarlungzangbo River，Tibetan Plateau. The unfertilized mature eggs of 0. stewartii，were spherical，yellowish，demersal and(2. 57±0. 07)mm in diameter. After fertilization and hydration，the fully swollen eggs were translucent，(3. 22±0. 07)mmin diameter. After 265 h，0. stewartii larvae were hatched with a total length of(10. 27 ±0. 15)mm at the water temperature range as 9. 5-11 .8 ℃.Around 20 days after hatching，the yolk sac of larva was absorbed completely with a total length of(15. 22± 0. 27)mm，and 80 days after hatching，hip scales appeared with a total length of(23. 65±0. 59)mm. In comparison with other Schizothoracinae，the traits of early development of 0.stewartii may enable the embryos to adapt to the torrential environment with low food rations in Tibetan plateau. |
| 许静,谢从新,邵俭,张惠娟,杨学峰,格桑达娃,林少卿.2011.雅鲁藏布江尖裸鲤胚胎和仔稚鱼发育的研究[J].水生态学杂志,32(2):86-95. |
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