细鳞鯻年龄与生长的研究

STUDY ON THE AGE AND GROWTH OF Therapon jarbua

选用胸鳍覆盖处的鳞片作为细鳞 (Theraponjarbua(Forssk l))的年龄鉴定材料 ,其年轮形成时期主要在2～4月。体长与鳞径呈线性关系。体长 体重关系为W=3.8891×10 2L2.8761。vonBertalanffy生长方程适合描述其体长和体重的生长 ,生长参数为 :L∞=35.9cm ,W∞=1153.7g,k=0.2376 ,t0= -0.2115。体重生长在4.41a具一拐点 ,此时体重生长速度达到最大。

The scales under pectroal fin were selected for the age determination material of Therapon jarbua .It was found that the new annulus began to appear mostly from February to April. The radius of scale is linearly and directly correlative to body length. The relationship between body length (L) and body weight (W) was expressed as W = 3.889 1×10 2 L2.876 1 . The growth of body length and body weight can be described the Von Bertalanffy growth equation. The estimated parameters were: L∞=35.9 cm, W∞=1 153.7 g, k=0.237 6, t0= 0.211 5. In the growth of body weight ,a inflection point, at which the weight growth rate reached the maximum,was found at the age of 4.41 years.