罗非鱼是一种适合淡水和咸淡水养殖的热带鱼类,全国各地多已推广养殖。众所周知,在池塘养殖的“生长期”抗病力较强,但在6个月左右(从11月至翌年4月)的越冬期抗病力较弱,经常发生各种疾病,造成大批死亡。现将几种常见病的症状、流行危害与防治方法简单介绍如下。 Tilapia is a tropical fish suitable for freshwater and brackish freshwater aquaculture and has been widely introduced throughout the country. It is well-known that the resistance to disease during the “growing season” of pond aquaculture is strong, but disease resistance is weaker during the winter period of about 6 months (from November to April the following April), causing various diseases and causing a large number of deaths. Now several common symptoms, epidemic hazards and prevention methods are briefly described below.