论文部分内容阅读
鱼种在越冬期间,特别是一些小型鱼池里,越冬鱼种一般死亡率高达10%～20%。这样不仅减少鱼种数量,还要影响来年成鱼的养殖,对渔业生产的损失较大。现将鱼种在越冬期死亡的原因与补救措施简介如下:一、鱼种越冬期死亡原因1、鱼种规格小:在越冬时期,大多数鱼类一般都不怎么摄食,活动量也少,新陈代谢缓慢。其主要以积存在鱼体内的脂肪、蛋白质等营养来维持生命。特别是规格太小的鱼种,体内积存的脂肪量少,经过一个寒冬的能量消耗到翌年
During winter, especially in small fish ponds, the prevalence of overwintering species is as high as 10% -20%. This will not only reduce the number of fish species, but also affect the fish farming in the coming year, resulting in greater losses to fishery production. Now species of fish died in the wintering reasons and remedies are as follows: First, the reasons for the death of fish species overwintering 1, small species size: during wintering period, most fish are generally not how to feed, activity is also small, Slow metabolism. Its main survival in the fish body fat, protein and other nutrients to sustain life. In particular, the specifications are too small species, the amount of fat accumulated in the body less, after a winter’s energy consumption to the following year