鱼类是一种变温动物,它的体温随周围水温变化而变化,一般与周围水温差0.5—1℃。因此,温度对鱼的生命活动起着重要的限制作用。目前我省渔业生产中一个较为突出而难以克服的问题,是冬季冰期长,春季温度低,致使家鱼人工繁殖时间过迟,苗种培育期短,当年鱼种规格小(一般在 Fish is a variable temperature animal, its body temperature changes with the surrounding water temperature, the water temperature difference between the general and the surrounding 0.5-1 ℃. Therefore, temperature plays an important role in limiting the life of fish. At present, one of the most prominent and insurmountable problems in fishery production in our province is the long ice age in winter and the low temperature in spring, which leads to the delay of artificial breeding of domestic fish and the short breeding period for the fish species