黑鱼养殖技术乌鳢养殖技术is not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installed doors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) provided一、黑鱼的经济价值黑鱼为经济价值较高的淡水名贵鱼类，有“鱼中珍品”之称。
其营养十分丰富，含大量蛋白质，比鸡肉和牛肉所含蛋白质都高。
从营养学角度分析，黑鱼是一种营养全面，肉味鲜美的高级保健食品。
黑鱼畅销国内外，售价昂贵，为我国外贸出口的重要水产品之一，在国内市场也是一种紧俏价高食品。
二、黑鱼的生活习性与食性、生长、生殖(一)生活习性is not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installeddoors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) providedis not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installed doors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) provided黑鱼为营底栖生活的鱼类，栖息环境极其广泛。
所以说，凡蛙、泥鳅、鲫及各种水生昆虫群栖的场所都是黑鱼喜栖的地方。
黑鱼多潜伏在水深1米的浅水处。
黑鱼的生存温度为0-41?，最适温16-30?，春季水温回升到8?以上时，黑鱼开始活动，由深水处游至浅水区觅食。
水温20?以上时生长较快。
夏季天闷热降雨时，往往会跃出水外匍匐于岸边的湿地上。
秋季当水温降到12?时，停止摄食;降到6?下，转到深水处活动。
冬季水温过低时，埋于淤泥中越冬，只要冰下有水就能完全越冬。
黑鱼能耐低氧。
在浑浊缺氧的水体中亦能生存。
当水中缺氧时，鱼体可将头露出水面，借鳃上器官，直接吸收空气中的氧气，进行气is not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installed doors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) provided体交换。
pH值:黑鱼一般均能在酸性和碱性的水域中生活。
黑鱼善跃:其跳跃能力很强，跳的也较高。
在有流水冲击和降雨时更易刺激黑鱼跳跃而逃跑，并常随水流逆行而上。
(二)食性黑鱼为凶猛肉食性鱼类。
主要以小型鱼类、虾类、蛙与蝌蚪、水生昆虫及其它水生动物为食。
随鱼体大小、季节和水体环境的不同，所摄取的食物的具体种类有所不同。
但无论如何，不会改变其肉食性营养类型的性质。
(三)生长is not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installed doors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) providedis not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installed doors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) provided当年孵化的鱼种一般长约150毫米，体重50克左右。
2龄鱼体长加速生长阶段，生长旺盛。
2龄后，呈现随年龄增长而递减趋势。
水温在20-25?时，生长较快。
(四)生殖(1)性成熟年龄。
长江流域一般2冬龄，本地一般第三年开始成熟产卵。
(2)怀卵量:一般个体怀卵量为1-3万粒，最大者5-6万粒。
不同年龄与不同大小的个体及不同水体的黑鱼其怀卵量不同。
三、黑鱼人工繁殖is not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installed doors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) provided(一)亲鱼选择亲鱼的质量是人工繁殖的关键因素。
黑鱼选择的年龄在2龄以上，体重为500克-1500克的个体较适合。
应当选择已达到性成熟的，身体无病无伤，个体大而生长性能好的亲鱼。
(二)雌雄亲鱼鉴别黑鱼雌雄个体无明显的第二性征差异，在外形上有时难于鉴别。
在生殖季节:雌鱼腹部膨大、松软，生殖孔微红稍突出，腹部为灰白色;雄鱼腹部较小，不如雌鱼松软，is not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installed doors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) providedis not less than 3 metres in length, not less than 1 m on both sides, Derrick (gantry) ceiling heights of more than 30 meters double. (2) the Derrick (gantry) ground floor entrance has "ever", and floor openings with safety doors, both sides of the channel set fence, under the skirting. (3) the Derrick (gantry) falls within the basket installed doors, the height limit, rope, safety devices such as floor stop. (4)the Derrick (gantry) provided生殖孔略凹。