作　　者： ; ; ; ;

机构地区： 中国科学院水生生物研究所

出　　处： 《动物学报》 2002年第5期667-676,共10页

摘　　要： 对藏北高原色林错湖泊中色林错裸鲤 (Gymnocyprisselincuoensis)的生长方程、生长拐点以及生长指标等生长特征进行了分析。结果表明vonBertalanffy生长方程、Gompertz方程和三次多项式方程都可以反映色林错裸鲤的生长过程 ,但Gompertz方程能够很好地描述 12龄之前的生长特征 ,而vonBertalanffy生长方程更适合描述 18龄以后的生长特征。这种情况反映了色林错裸鲤具有洄游性鱼类更换生活环境的生活史特征。雄性体长的vonBertalanffy生长方程为 :Lt =4 84 190 6 [1-e-0 0 683 9(t-0 0 60 2 8) ],雌性为Lt =4 85 32 85 [1-e-0 0 710 (t-0 5679) ]。体长和体重关系为W =0 0 0 0 2 3L2 53 0 3 (♂ )和W =0 0 0 0 4 6L2 40 72 (♀ )。生长拐点为 12 9龄 (♀ )和 14 2龄 (♂ )。与其它裂腹鱼类相比 ,色林错裸鲤的生长过程尤为缓慢 ,这与其生存的环境条件更为恶劣直接相关。 Selincuo schizothoracini is an endemic Tibetan fish that has been turned into the basis of an economically important local fishery since 1992. However, there were no ecological studies on this species before. This paper presents information on growth features of Selincuo schizothoracini, including growth functions, growth index and inflexion point. Specimens were captured between 1997～1998 using 3 0～6 0 cm mesh nylon trifilament gill nets and throwing nets during. The standard length and total weight of each specimen was measured after captured. Individuals were sexed on the basis of morphological sex characters and/or the gonads of sacrificed specimens. Both annulus and otolith radii were measured along the vertical line from the outboard ridge to the nucleil of sectioned sagittae using a micrometer and binocular microscope. A total of 252 sectioned otoliths were measured. The regression line between sectioned otolith radius and standard length was fitted for each sex in order to back calculate standard length. Three growth models, the von Bertalanffy growth function, Gomperz growth function and decimal cubic function, were used to model the standard length growth of Selincuo schizothoracini using the weighted average of back calculated standard lengths. The von Bertalanffy growth equations were L t =484 1906[1-e -0 06839( t -0 6028) ] (♂) and L t =485 3285[1-e -0 0710( t -0 5679) ] (♀), Gomperz growth equations were L t =382 5614e -exp[-0 1997( t -0 5319) ] (♂) and L t =405 4271e -exp[-0 1889( t -5 7228) ] (♀) and the decimal cubic equations were L t =-25 7461+41 1394 t -1 5622 t 2 +0 0232 t 3 (♂) and L t =-24 2198+40 1444 t -1 3629 t 2 +0 0174 t 3 (♀), where t is age. Each of these growth functions provided a high goodness of fit and accurately described the growth of Selincuo schizothoracini well. Among them, the decimal cubic function had the highest goodness of fit. However, the von Bertalanf

关 键 词： 色林错裸鲤 生长 体长 体重关系 西藏 鱼类 高原湖泊

领　　域： [生物学]