实践证明,规格大、体质好的鱼种是获得渔业高产的先决条件。然而,保护规格大、体质好的鱼种安全越冬历来被认为是渔业生产中的一大难关。 为了突破鱼种越冬的难关,我们从实践中体会到,采取如下几条措施是十分有效的。 1.注意保护鱼种的体质 草鱼等几种主要的养殖鱼类,当水温低于7—10℃以下时就基本停止摄食或很少摄食,新陈代谢减缓,生长几乎停止。越冬期 Practice has proved that large size, good quality fish species is a prerequisite for high-yield fisheries. However, the protection of large size, good physical safety of winter species has long been considered a major fishery production difficulties. In order to break the difficulties of overwintering fish species, we have learned from practice that it is very effective to adopt the following measures. 1. Attention to the protection of fish species of grass carp and other major cultured fish, when the water temperature below 7-10 ℃ below the basic stop feeding or rarely feeding, slowing metabolism, growth almost stopped. Overwintering