论文部分内容阅读
近年来,对虾亲虾越冬技术在全国,特别是北方沿海地区迅速推广。随着对虾越冬范围的扩大,越冬场点的增多,越冬亲虾占对虾育苗所用亲虾的比例越来越大。但在亲虾越冬技术的推广中,许多单位把主要注意力放在亲虾的成活率上,而忽视了越冬亲虾的育苗率。因此,尾虾产苗量越来越低。在亲虾越冬技术攻关研究时一般每尾越冬亲虾产苗5万尾左右,而现在一般每尾越冬亲虾产苗量仅为2万尾左右,其原因当然是多方
In recent years, shrimp shrimp overwintering technology in the country, especially the rapid spread of the northern coastal areas. With the expansion of the overwintering range of shrimp and the increase of overwintering field, the proportion of overwintering broodstock in broodstock is increasing. However, in the promotion of broodstock overwintering technology, many units have focused their attention on the survival rate of broodstock while neglecting the breeding rate of overwintering broodstock. Therefore, shrimp shrimp production is getting lower and lower. Overwintering technology research in broodstock during the general cross-winter pro-shrimp births around 50,000, and now generally over the winter end of the pro-shrimp production of seedlings is only about 20000, the reason of course, multi-party