花提早人工催产及孵化试验

2008年4月16-28日在浙江湖州地区进行了花于水温15℃条件下的人工催产生产性试验。用常规催产剂和方法,催产花亲鱼540尾,其中雌亲鱼355尾、雄亲鱼185尾。试验结果表明:排卵率为91.5%,催产效应时间为29.5 h,群体排卵时间为2.5 h;受精率为98.7%;孵化鱼苗(下塘鱼苗)380万尾。与常规生产水温17～18℃以上催产情况比较,在水温15℃条件下,花也完全可以进行人工催产;除效应时间和孵化时间延长及卵膜难以溶解外,其排卵率、受精率、群体排卵时间和孵化率等均无明显差异。

Experiment on Hemibarbus maculates:Artificial inducing ahead of schedule and hatching

At the temperature of 15 ℃,the artificial propagation of Hemibarbus maculates was conducted at Huzhou of Zhejiang Province from April 16 to 28 in 2008.540 mature fish with 355 individual females and 185 individual males had been injected with the general exogenous hormones.The results indicated that the spawning rate was 91.5%.Effective time was 29.5 h.The spawning time of colony lasted 2.5 h.The fertilizing rate was 98.7%.38×105 fry was obtained.At the temperature of 15 ℃,hemibarbus maculates can be breeded arificially completely.There was no significent difference in spawning rate,fertilizing rate,spawning time of colony,hatching rate,etc,except the delay of effective time and hatching time and dissolving egg membrane difficultly,in comparison with the artificial propagation of Hemibarbus maculates at the normal temperature of over 17～18 ℃.