豫北地区大鳞副泥鳅胚胎发育的观察

Observation on the Embryonic Development of Paramisgurnus dabryanus

目前泥鳅和大鳞副泥鳅的养殖热潮正在全国范围内兴起,优良新品种的培育早已经为养殖者所期待.胚胎发育过程特征的研究是进行新品种培育的基础工作.对产自豫北地区的大鳞副泥鳅的胚胎发育过程进行了连续观察,对其各个胚胎时期的发育特征和持续时间进行了记录.结果表明从受精卵到出膜共划分为6个阶段和卵裂期、囊胚期、原肠期、神经胚期、肌节期、尾芽期、胚动期、出膜前期、孵出期、眼黑色素期等10个连续的典型时期,在23℃时胚胎发育历时共24 h 20 min.

A great upsurge in breeding of mud loach is rising in China. Fishman is looking forwards to fine varieties of it. Studies on embryogenesis is the foundation of breeding of new varieties of loach. In this paper, embryogenesis characteristics of Paramisgurnus dabryanus from northern Hennan province was reported. Fertilized eggs were incubated in at 23 ℃ and the process of embryogenesis was observed consecutively. The total development time of every development stage was noted and calculated and the characteristic images were taken. The result showed that the process of embryogenesis was divided in 6 stages from fertilization to hatching. 10 topical phases were observed including cleavage, blastula, gastrula, neurula, myomere, caudal bud, embryo movement stage; pre-hatching stage and hatching stage. The embryonic development of P. dabryanus spended 24 h 20 min.