【摘要】 采用胸鳍第三支鳍骨作为研究湛江沿海中华乌塘鳢的年龄鉴定材料。胸鳍第三支鳍骨 (远侧部 )的半径 ( R)与体长( L)的关系为 L =6 .1 1 4 5 + 5 1 .1 2 88R。用特殊 von Bertalanffy生长方程、一般 von Bertalanffy生长方程、逻辑斯谛生长方程、Gompertz生长方程和灰色动态生长模型等 5种生长模型拟合了中华乌塘鳢的生长 ,根据各模型拟合残差平方和的大小判断 ,灰色动态生长模型对中华乌塘鳢生长的拟合效果最好 ,其次是一般 von Bertalanffy生长方程。根据 r-选择和 k-选择的典型特征以及渐近体长 ( L∞ )、渐近体重 ( W∞)、生长系数 ( k)、初次生殖年龄 ( Tm)、最大年龄 ( Tmax)、瞬时自然死亡率 ( M)和性腺指数 ( GI)等 7个生态学参数值 ,可以判断中华乌塘鳢偏向 r-选择。应用单位补充量产量模型计算改变起捕年龄 ( Tc)和瞬时捕捞死亡率 ( F )的产量 ,分析产量变化曲线同样证实中华乌塘鳢生活史偏向 r-选择。作为渔业管理对策 ,中华乌塘鳢的起捕年龄应定为 2龄更多还原

【Abstract】 The present paper deals with the growth and life-history pattern of black Chinese sleeper, Bostrichthys sinensis. A total of 356 specimens were collected from the littoral waters of Zhanjiang during the period from December 1997 to May 1999, Which consists of 4 year groups, from age group Ⅰ to age group Ⅳ. The third actinost of pectoral fin was selected for age determination. The relationship between body length (L,mm) and radius of distal portion of the third actinost (R,mm) was expressed as L=6.1145+51.1288R. The length-weight relationship formula was calculated to be W=1.0169×10 -5 L 3.1316 . Specialized von Bertalanffy growth formula, generalized von Bertalanffy growth formula, Logistic growth formula, Gompertz growth formula and grey dynamic growth model were used for fitting the length and weight growth of B. sinensis. The sum of residual squares were compared with one another and the results show that the grey dynamic growth model is the best precise model to fit the growth and the generalized von Bertalanffy growth formula is the second. According to the typical characteristic of r and k selection and the given values of seven ecological parameters, namely, asymptotic body-length (L), asymptotic body-weight (W), growth coefficient (K), instantaneous natural mortality (M), primary reproductive age (T m), maximum age (T max) and genital gland indices (GI), it is concluded that the life-history pattern of B. sinensis tends to be r-selected. Meanwhile, yield per recruit model is applied to calculate the fish yield. And analysis of yield curves also demonstrates that the life-history pattern has a tendency towards r-selection. As a strategy of fishery management, the minimum harvesting age should be two years old, which is advantageous to the conservation of resources.更多还原