黑尾近红鲌的比例性状、长质量关系和丰满度

黑尾近红Bo的比例性状在雌雄之间无差异，长质量关系和丰满度分析表明，雌鱼的体质量增长快于雄鱼，同体长个体，非繁殖期丰满度高于繁殖期；丰满度随体长，年龄的增加而提高。

Morphometric Characteristics, Length-Weight Relationship and Fullness in A. nigrocauda

From Feb.1999 to Dec.2000, 562 specimens of A.nigrocauda were collected from laixi river, a branch of the Tuojiang river. Differences between male and female in morphometric characteristics, such as body length, barble length and caudal peducle length, were not found. The weight, as well as the fullness(K) for males are less than that for females of corresponding length. The fullness (K) in non reproductive period fish are higher than that of reproductive period fish. The obvious differences between the values of k increase with increase in body length indicates that the body height and body depth increase more fast than body length.