中文摘要：

巨须裂腹鱼（Schizothorax macropogon）是雅鲁藏布江的重要经济鱼类。作者利用2004-2006年在雅鲁藏布江水系收集的293尾样本,以背鳍条磨片作为主要鉴定年龄的材料,对西藏雅鲁藏布江巨须裂腹鱼种群进行了年龄结构和生长特性的研究。结果表明,巨须裂腹鱼的雅鲁藏布江种群由2-14龄和16龄共14个龄组组成。其中优势龄组为4-6龄（占74.85%）。群体总性比为（♀∶♂）=1∶0.881。体长与体重的关系方程分别为：W♀=0.023L2.904（♀）,W♂=0.018L2.962（♂）,属于匀速生长类型。用vonBertalanffy方程描述的生长方程分别为♀：Lt=65.676[1-e^-0.053（t＋3.305）],Wt=4520.633[1-e^-0.053（t＋3.305）]^2.904;♂：Lt=49.622[1-e^-0.074（t＋4.017）],Wt=2034.481[1-e^-0.074（t＋4.017）]^2.962。雌、雄个体生长的拐点年龄分别为16.6龄和10.7龄,对应的体长及体重分别为43.06cm、1326.75g（♀）和32.86cm、600.31g（♂）。

英文摘要：

Schizothorax macropogon is one of the most important commercial species in the Yarlung Zangbo River. We aged all the specimens and indentified growth characteristics by examining 293 specimens collected in the Yarlung Zangbo River during 2004 and 2006 based on dorsal fin ray sections. The specimen was formed by 14 age groups from age2 to age 14 and age 16. The most proportion of the specimen were formed by individuals age 4 to age 6, accounting74.85% to the total specimen examined. Sex ratio （♀ ：♂） was 1：0.881. The relationship between standard body length and weight was described by formula W = 0.018L^2.962 for males and W = 0.023L^2.904 for females respectively. Therefore, the growth of S. macropogon was in a constant speed which can be described with yon Bertalanffy equation, Lt = 49.62211 - e^-0.074（t＋4.017） ], Wt = 2 034.481[1 - e^-0.074（t＋4.017） ]^2.962 for males and Lt = 65.67611 - e^-0.053（t＋3.305） ], W, = 4 520.633[ 1 - e^-0.053 （t,＋3.305） ]^2.904 for females. The growth inflexion points were 10.7 years and 16.6 years for males and females respectively with the corresponding standard body lengths 32.86 em （♂）, 43.06 cm （♀） and body weights of 600.31 g （♂）, 1 326.75 g （♀）.