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本文根据1980—1986年间连续逐月牙鲆生物学测定和耳石观察资料,确认其年轮形成期在3—5月,主要在4月。经标准von Bertalanffy生长方程拟合,鱼体体长(mm)年间生长规律为: ♀:L_t=800.10[1-e~(-0.2323(t-0.0254))] (?):L_t=690.62[1-e~(-0.2557(t+0.1211))]依体长与体重间相关关系计算渐近体重和最大生长速度,雌鱼分别为8370.43g和865g/a;雄鱼分别为4867.15g和554g/a。对低龄鱼(0—Ⅲ)生长特征模拟结果表明,雄鱼体长生长的季节变动幅度(C=1.07,k=0.5925)明显大于雌鱼;当年生雄鱼在7—9月的生长速度为年内最大。
In this paper, based on the continuous measurement of osprey and the otolith observation data from 1980 to 1986, it was confirmed that the annual ring formation period is from March to May, mainly in April. According to the standard von Bertalanffy growth equation fitting, the growth law of the body length (mm) was: _: L_t = 800.10 [1-e -0.2323 (t -0.0254))] (?): L_t = 690.62 [1 -e ~ (-0.2557 (t + 0.1211))] The asymptotic body weight and maximum growth rate were calculated according to body length and body weight. The females were 8370.43g and 865g / a respectively. The male were 4867.15g and 554g / a. The results of simulating the growth characteristics of young fish (0-Ⅲ) showed that the seasonal variation of male body length (C = 1.07, k = 0.5925) was significantly greater than that of female fish. The growth rate of male fish in July-September was The year’s largest.