论文部分内容阅读
河蟹是一种重要的淡水创汇产品,适温范围广、抗病力强、饵料广泛,具有投资少、见效快、收益大的特点,是发展三高创汇农业的后起之秀。但是由于近年来工农业“三废”污染,建水闸、酷渔滥捕等造成天然蟹苗资源大幅度下降,影响了河蟹的增养殖,河蟹奇缺,国内外市场价格上涨。因此,为了解决养殖河蟹的种苗需要,我站于1993年11月至今年3月中旬着手进行亲蟹的选育、催产、抱卵蟹的培育、幼体的培养管理、蟹苗(大眼幼体)的驯化等不同阶段的探索,掌握了不同阶段的关键技术,亲蟹交配产卵率100%,孵化率达90%,幼体成活率达11.35%,育出经淡化的蟹苗(大眼幼体)83万只。
Crab is an important freshwater foreign exchange earning product with a wide range of suitable temperature, strong disease resistance and wide range of feed. It has the characteristics of low investment, quick returns and large profits, and is a rising star in the development of San Gao Foreign-exchange Agriculture. However, in recent years, due to industrial and agricultural “waste” pollution, built sluices, fishing overcrowding caused by natural crabs and other resources significantly decreased, affecting the growth of crab farming, crabs lack of domestic and international market prices. Therefore, in order to solve the need of breeding seedlings of crabs and crabs, I started to carry out the breeding of crabs, breeding of oxytocin and nursery crab, cultivation and management of larvae, crabs (big eyes and larvae) from November 1993 to mid- The domestication rate of maternal crabs reached 100%, the hatching rate reached 90%, the survival rate of larvae reached 11.35%, and the desalinated crabs (big eyes and larvae) were raised. 830,000.