我省地处北纬43°23′至53°34′、东经115°31′至135°之间,冬季漫长,夏季短而温热,秋季降温急骤,大部分地区半年结冰,气候相当寒冷。由于气候条件,我省鱼类产卵季节较晚,特别是草、鲢鱼,一般在6月下旬,甚至到7月上旬,因而鱼种培育期短,育成鱼种规格小。加之冬季大部分地区结冰厚达1米左右,鱼种越冬成活率很低,成鱼养殖效果受到很大 The province is located between latitude 43 ° 23 ’to 53 ° 34’ and longitude 115 ° 31 ’to 135 ° longitude. It is short in winter and warm in summer, with sharp precipitations in autumn and freezing in half a year in most areas, and the climate is quite cold. Due to climatic conditions, the province’s fish spawning season later, especially grass, silver carp, usually in late June, and even in early July, which breed short, breed small breed. In addition, the icing in most parts of winter is about 1 meter thick, the survival rate of fish species is very low, and the fish breeding effect is greatly affected