池塘鱼种进入冬眠期,活动量少,一般不吃食,靠消耗体内的营养物质维持生命,到来年春季体重一般会减轻10%～20%。这期间如管理不当,会造成鱼种死亡率高达15%～25%,从而影响来年的正常养殖。为此特别提出鱼种安全越冬和关键技术,供参考。一、越冬期鱼种死亡的原因1.水体严重缺氧冬 Pond fish species into the hibernation period, less activity, generally do not eat, rely on the consumption of nutrients in the body to maintain their lives, the coming spring weight will generally reduce 10% to 20%. Mismanagement during this period could result in fish mortality of up to 15% to 25%, thus affecting normal farming in the coming year. In particular, fish species overwinter and key technologies for reference. First, the reasons for the death of winter species 1 water a serious lack of oxygen in winter