红水河斑胚胎孵化及早期胚胎发育观察

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中图分类号：S961.2 文献标志码：A 文章编号： 1004-6755（2025）08-0032-05

Abstract：To conduct artificial propagation research on Hemibagrus guttatus，the effects of different incubation methods and temperatures on the hatching performance of its embryos were thoroughly investigated. Additionally，observations were made on the embryonic morphology at various development stages within the Hongshui River system.The results indicate that fertilized eggs of Hemibagrus guttatus are spherical，yellow，with a diameter of 2.8～3.5mm . Under water temperature conditions of （28±0.5 ） °C ，embryonic development lasted 65h34min with，an accumulated temperature of 1822.8∘C⋅h ， Seven developmental stages were documented： fertilized egg，cleavage， blastula，gastrula，neurula，organogenesis，and hatching. Among incubation methods，the combination of hatching barrels whit incubation frames achieved the highest average hatching rate of （75.00±3.15）% .The optimal incubation temperature for Hemibagrus guttatus in the Luodian County section of the Hongshui River was determined be 27～29°C ！

Key words： Hongshui River; Hemibagrus guttatus ; embryonic development; hatching

斑（Hemibagrusguttatus），俗称芝麻剑，科，无鳞片、无肌间刺，栖息于河底，主要分布在中国东南部的珠江、沅江、九龙江、汉江等流域[1]。（剩余7310字）