Freshwater fishing grounds have decreased by one-seventh in area, and, as massive amounts of chemical fertilizers have been applied in an attempt to raise the fertility of the reclaimed soil, annual catches have plummeted by one half.
再加上新生農地土質貧瘠，耕作時大量施用化學肥料，而化肥卻隨渠水流入湖中，殃及池魚。往昔以魚鮮蝦美聞名的雲南滇池，如今魚蝦因含磷量大增，已乏人問津。在圍湖造田導至的「以農擠魚」結果中，全大陸養殖面積減少七分之一，魚產下降一半。