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鱼类年龄的测定是渔业生物学上一个重要问题。在渔业生产实际工作中,也常常要求准确的鉴别鱼类的年龄。根据鱼类鳞片测定鱼的年龄,过去,在国内外,所提出的理论和方法很多,但都必须借助于生物解剖镜条件下,按一定的程序,在室内进行。这样的观察条件,目前在各生产单位还是比较困难的,观察的方法也不易掌握。譬如在家鱼人工繁殖,选择亲鱼时,对被选择的
The determination of fish age is an important issue in fishery biology. In the actual work of fishery production, it is also often required to accurately identify the age of fish. According to the age of fish scales determined by fish, in the past, at home and abroad, many theories and methods proposed, but must be under the conditions of biological dissection, according to a certain procedure, indoors. Such observation conditions are still quite difficult at present in various production units and the methods of observation are not easy to grasp. For example, artificial reproduction of fish in the home, the choice of broodstock, was chosen