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蓝圆鲹在东、黄、南海均有分布,是围网渔业的主要捕捞对象,本文将分布于东海北部一个数量较大的群体进行了年龄和生长的研究。基础材料取自1980年5月到1983年4月浙江海域围、拖网等渔获物中共2727尾渔获物样品,选择其中644尾的鳞片和耳石作了年龄鉴定和生长研究。结果表明:蓝图鲹的鳞片和耳石显示的年轮特征均甚清晰,都是一年形成一次,出现年轮的时间大部在5—6月;蓝圆鲹体长与体重的关系式为:W=1.652×10~(-6)L~(2.947),其生长规律可用von Bertalanffy的生长方程描述,求得长度生长方程的各个参数是:L_∞=361毫米,K=0.276,t_0=-1.846;求得重量生长方程的各个参数是:W_∞=570克,K=0.282,t=-1.80,其重量生长曲线的拐点位于t=2.098龄处。
Blue-billed pomfret is distributed in the east, the yellow and the South China Sea. It is the main fishing target of the seine fishery. This paper will study the age and growth of a large population in the northern part of the East China Sea. The base materials were collected from 2,727 fish samples collected from the catchment and trawl in Zhejiang waters from May 1980 to April 1983, and 644 scales and otoliths were selected for age identification and growth study. The results showed that the scales and otoliths of blueprint 鲹 showed the characteristics of annual rings are very clear, are formed once a year, most of the time appears in the rings from May to June; the relationship between body length and body weight : W = 1.652 × 10 ~ (-6) L ~ (2.947). The growth law can be described by the growth equation of von Bertalanffy. The parameters of the growth equation are as follows: L_∞ = 361 mm, K = 0.276, t_0 = -1.846. The parameters of the weight growth equation were as follows: W_∞ = 570 g, K = 0.282, t = -1.80, and the inflection point of its weight growth curve was at t = 2.098.