细鳞鲑胚胎发育观察
Observation of Embryonic Development of Brachymystax lenok
摘要:
本研究观察了自然水温孵化条件下，细鳞鲑的胚胎发育过程。细鳞鲑胚胎发育要经过受精卵、卵裂、囊胚、原肠、神经胚和器官形成等6个发育阶段，26个发育时期，详细描述了各个发育时期的胚胎发育特征。水温4.4℃~12.5℃、pH值6.8~7.0、溶解氧8.1~8.5 mg/L、光照强度500~800 Lx的孵化条件下，细鳞鲑受精卵经过633 h破膜，积温206.33℃•d。
Abstract:
The embryonic development of Brachymystax lenok was observed under the condition of natural temperature incubation. It was divided into six stages including fertilized egg, cell division, blastula, gastrula, neurula, organogenesis, and twenty-six developmental phases, whose characteristics were described in detail. Under the conditions water temperature 4.4˚C~12.5˚C and pH 6.8~7.0 and DO 8.1~8.5 mg/L and illumination intensity 500~800 Lx, the larvae hatched 633 hours after fertilization, the cumulative temperature of embryonic development was 206.33˚C∙d.
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