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鸭淀水库位于天津市西青区,是一座蓄水、农田灌溉、水产养殖等多功能的平原型水库,水库面积16000亩,平均水深3m。近年来陆续引进多种鱼类,已形成多品种混养复杂生态区系。然而。由于放养密度不断增加;每年大量调运苗种和引进新品种,带入各种病原体;加之年降雨量偏低,淡水水源紧张及水质污染等原因,使水库鱼类病害日趋严重。鱼类越冬后体质下降,今年春季陆续发生死鱼现象,造成严重经济损失,1996年3—5月份与去年同期相比,捕捞量减少十几万公斤。
Located in Xiqing District, Tianjin, YDD is a multi-functional plain reservoir with water storage, farmland irrigation and aquaculture. The reservoir area is 16000 mu and the average water depth is 3m. In recent years, gradually introduced a variety of fish, has formed a multi-species polyculture complex ecological fauna. however. Due to the increasing stocking density, large numbers of seedlings are transferred and new varieties are introduced each year, leading to various pathogens. Coupled with the low annual rainfall, fresh water shortage and water pollution, the disease of fish in reservoirs is becoming more and more serious. After the winter fish drop in their physique, the phenomenon of dead fish ensues one after another this spring, causing serious economic losses. Compared with the same period of last year, the catch decreased by more than 100,000 kilograms.