河蟹控温育苗高产试验

Experiment on High Yield of River Crab Breeding with Water Temperature Control

为满足对早期蟹苗的需求，进行了河蟹控温育苗高产试验。在850m3水体中，一茬育出大眼幼体329kg，计4606万只，平均1m3水体出苗量为0.387kg（54万只），平均成活率为21．93％。通过试验，探索出高产技术是：1）交配前对亲坚加强饲喂，增加营养积累，促进亲蟹交配；2）交配时把水温和盐度分别控制在10～14℃和18～22；3）越冬促熟亲蟹期，要投喂优质鲜活饵料，池水盐度要高于交配时，水温不低于6O℃；4）掌握好换水时间和换水量，尤其要控制好温度和盐度的变化。

In order to inquire int0 the optimum water temperature,salinity and nutritionfor rearing the river crab larvae in early stage,an experiment was made 0n controlling waterternperature,salinity and diet nutrition.The experimental result shew that in 85O m3 of thewater body 329 kg of mega1opa were bred out in one crop,numbered 46O. 6 million 1nd1vldu-als,the average per one m3 of water body out of 0. 387 kg(40～50 thousand individuals). Thesurvival rate was 21. 93% on average.