光倒刺鲃的年龄与生长的初步研究

研究了光倒刺鲃(Spinibarbus hollandi)的年龄与生长规律,结果表明:光倒刺鲃鳞片年轮特征主要为疏密切割型。体长与鳞长呈直线相关L=44.44R-11.69,体重与体长呈指数函数相关W=0.0258L2.9125,4龄以前生长较快,生长指标高,体长指标高,体长和体重的相对增长率大,其生长规律可用Von Bertalanffy方程表达:Lt=67.31-e-0.2018(t-0.1338)],Wt=5441.441-e-0.2018(t-0.1338)]3。体重生长曲线的拐点位于t=5.678,拐点体长Lr=45.313cm,拐点体重Wr=1660.885g。光倒刺鲃雌性一般在3~4龄性成熟,雄鱼3龄时性成熟。

The Age and Growth of Spinibarbus hollandi Oshima

The age is determined by the rings on scales.The results got from the study of Spinibarbus hollandi Oshima show that:(1)The main feature of annual-ring is loose,close and pattern.(2)The relationship between the body length and the scale radius is L=44.44R-11.69.The relationship between the body length and the weight is W=0.0258L2.9125.(3)The Spinibarbus hollandi Oshima has the relatively fast growth rate,high growth index and large relative growth rate of body length and weight under the age of four.And the boby growth pattern described by Von Bertalanffy equation is:Lt=67.31-e-0.2018(t-0.1338)],Wt=5441.441-e-0.2018(t-0.1338)]3.(4)The inflexion point of body weight growth curve is:t=5.678 years,Lr=45.313cm,Wr=1660.885g.(5)The females of Spinibarbus hollandi Oshima often get matured at the age of three to four,and the males matured at the age of three.