【摘要】 1992年5月～7月分别对9组华鳈亲鱼进行的催产试验结果进行分析,并对其早期发育进行了较为详细的观察。华鳈受精卵在水温为22～33℃的条件下胚胎发育时间为54～74h,水温34℃左右时仍能正常发育;孵出时眼黑色,胸鳍基已形成,有发达的居氏管;孵出后第二天鳔即充气,第三天可以摄食并能自由在水层生活。更多还原

【Abstract】 The study on artificial propagation and early development of Sarcocheilichthys sinensis sinensis was carried out from May to July in 1992. The results show that hormone with better effect is LRH-A mixed with DOM through the propagation of 9 pairs of brood fish. Eggs hatch in 54-74 hours under water tempertures ranging from 22. 5℃ to 34.0℃ ,and can de-velop normally at 34℃ . The embryonic and postembryonic development was observed continu-ally before emergence of scales. The early development is subdivided into 44 stages, and its morphological features are rather similar to those of other cyprinidae fishes which also lay drift-ing eggs. However, the fish has its own characteristics: there are oil-globule on the yolk sac. When hatching, its eyes become dark, pectoral fin buds has formed and vein cardinalis communis has developed well. The larvae has one chamber air bladder hatching after one day and starts swimming and feeding in the next day.更多还原