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本文以1981～1984年4～9月累计18个月在闵中、闵东渔场开展中上层鱼类资源开发性探捕调查的材料,报道了扁舵鲣的生态分布、群体结构和生活史主要特征。鱼群先后于4～7月由南而北进入本渔场,数量分布以5月为多;栖息的最适温、盐度分别为23.5～25.5℃和33～34;渔获群体由0～V龄组成;性成熟的最小年龄为Ⅰ龄,最小叉长271～280mm;生长参数L_∞=484.44mm,W_∞=2050.76g,K=0.5109,t_0=0.3598;瞬时自然死亡率为0.8937,开发比率为0.2138,属于轻度利用的鱼类资源,尚有较大的开发潜力。
In this paper, from 1981 to 1984, 4 months to September 1984, a total of 18 months in Minzhong, Min Dong fishing ground exploration of upper pelagic fish resources exploration and investigation of the material, reported the flat rudder 生 ecological distribution, population structure and life history of the main feature. The fish populations entered the fishery from south to north from April to July, and the distribution was more in May. The optimum temperature and salinities of the fish were 23.5-25.5 ℃ and 33-34, respectively. The catch population from 0 to V The minimum age of sexual maturity was Grade Ⅰ and the minimum fork length was 271-280mm. The growth parameters were L_∞ = 484.44mm, W_∞ = 2050.76g, K = 0.5109, t_0 = 0.3598. The instantaneous natural mortality was 0.8937, 0.2138, belonging to the mild utilization of fish resources, there is still greater potential for development.