西北地区池塘养殖的鲤、青、鲢、鲂、鳊、草、鳙、鲫等温水性鱼类,越冬期间经常出现鱼体重严重下降及大量死亡的现象,严重制约着养殖业的发展。现将实践中总结的减少鱼类越冬死亡的三点预防措施介绍如下:一、越冬池的选择越冬池的好坏关系到鱼体的生长发育,一般要求选择背风向? Common warm water fish such as common carp, blue carp, silver carp, bighead carp, bighead carp, bighead carp and crucian carp cultured in the ponds in northwest China often appear severe weight loss and heavy death during the winter, which severely restricts the development of aquaculture. Now in practice to reduce the overfishing of fish death three preventive measures are described below: First, the choice of overwintering pool Overwintering pool is related to the growth and development of the fish body, the general requirements for the selection of leeward?