团头鲂肉质鲜美、含肉量高,又具有食性广、疾病少等优点,现已成为我国主要淡水养殖品种之一。在我国长江中下游流域,团头鲂的饲养周期习惯上是三年,由于该鱼在第三龄的饲养过程中性腺发育成熟,导致生长速度减缓、饲料系数增高,因而经济效益不够显著.近年来上海郊区已逐渐推广二龄上市的饲养方法。要使团头鲂在二龄内达到商品规格,培育 Bream 鲂 meat quality, high meat content, but also has wide foodicity, less disease, etc., has become China’s major freshwater aquaculture species. In the middle and lower reaches of the Yangtze River in our country, the feeding cycle of bream is customarily three years. Due to the mature gonad during the feeding of the third instar, the growth of the fish slows down and the feed coefficient increases, so the economic benefit is not significant enough. Shanghai suburbs have gradually promoted the second age listed breeding methods. To make the first group to reach the product specifications within the second age, nurturing