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革胡子鲶具有耐低氧、耐高温、食性广、抗病力强,生长速度较快等优点,但耐低温能力较差,一般在水温降至12℃时即停止摄食,水温为6.5—7.0℃时易死亡。笔者经过多年的革胡子鲶生物学特性研究,认为该鱼在人工繁殖及幼鱼的培育过程中应注意以下几个问题。一、亲鱼的选择雌雄革胡子鲶幼鱼(全长小于8—10cm)在外形上较难区分。性成熟后,雄性亲鱼较瘦长,具有长条形的外生殖突,而雌性亲鱼较肥短,生殖突较平坦。一般讲革胡子鲶的夏花养殖一年后即可达到性成熟。经笔者观察,Ⅰ龄鱼的雌性个体比雄性个体成熟早些,作为雌性亲鱼,Ⅰ、Ⅱ
Catfish with low resistance to hypoxia, high temperature, wide feeding, resistance to disease, rapid growth and other advantages, but low temperature tolerance is poor, usually in the water temperature dropped to 12 ℃ to stop feeding when the water temperature is 6.5-7.0 Easy death when ℃. After years of research on the biological characteristics of the catfish, we believe that the fish should pay attention to the following problems in the process of artificial breeding and juvenile fish breeding. First, the choice of broodstock Male and female bearded catfish juvenile (less than 8-10cm in length) is more difficult to distinguish in appearance. After sexual maturity, male broodstock are more elongated, with long stripe-shaped exophthalmos, while female broodstock are shorter and fatter with a more flat reproductive process. Generally speaking, the summer mustard catfish summer culture can reach sexual maturity. After the author observed, the first-instar fish female individuals mature earlier than male individuals, as female broodstock, Ⅰ, Ⅱ