南日列岛西南部海区鱼类数量变化及其与水团关系

发布时间：2018-05-29 20:00

本文选题：海峡暖水 + 闽浙沿岸水　；参考：《热带海洋学报》2016年03期

【摘要】：依据2009年冬季、2010年春季和夏季在南日列岛西南部海区3个航次的渔业资源综合调查资料,通过对南日列岛西南部海区鱼类资源密度及分布特征、体长、体重、幼体比、优势种、相对重要性指数以及优势种对鱼类总数量的贡献,讨论了南日列岛西南部海区鱼类数量变化及其与水团变化之间的关系。结果表明:春、夏、冬3季鱼类重量密度分别为601.26kg·km~(-2)、2599.60kg·km~(-2)和730.36kg·km~(-2);尾数密度分别为17.3×10~3尾·km~(-2)、255.00×10~3尾·km~(-2)和22.6×10~3尾·km~(-2);平均体长、体重和幼体比分别在春季、冬季和夏季为最高,分别为14.95cm、49.76g和81.72%。春季主要由产卵群体组成,多为规格较大的成鱼;夏季由索饵群体组成,多为规格较小的幼鱼。鱼类数量的平面分布与福建近海不同季节水团的变化有关,春季鱼类聚集在闽浙沿岸水和海峡暖水交汇的外侧海域,夏季鱼类多聚集在营养盐丰富,沿岸流控制的近海海域。各季节鱼类数量分布特征与优势种分布基本一致。
[Abstract]:Based on the fishery resources survey data of three voyages in the southwest sea area of the South Japan Islands in winter, spring and summer of 2009, the density and distribution of fish resources, length, body weight, larval ratio and dominant species of fish resources in the southwest sea area of the South Japan archipelago were studied. The relative importance index (RMI) and the contribution of dominant species to the total fish population are discussed. The relationship between the fish population change and the water mass variation in the southwestern sea area of the South Japan Islands is discussed. The results showed that the weight densities of fish in spring, summer and winter were 2599.60kg / kg 601.26kg kmm-1 ~ (-2) and 730.36kg kmmc-2 ~ (-2), respectively, and the Mantissa densities were 17.3 脳 10 ~ (3), 255.00 脳 10 ~ (3) and 22.6 脳 10 ~ (3), respectively, and the average body length, body weight and larval ratio were the highest in spring, winter and summer, respectively, and were 14.95 cm ~ (49.76 g) and 81.72%, respectively, in spring, winter and summer, respectively, with the following results: (1) the weight density of fish in spring, summer and summer was 255.00 脳 10 ~ (3) and 22.6 脳 10 ~ (3), respectively, and the average body length, body weight and larval ratio were the highest, with the highest values in spring, winter and summer respectively. Spring is mainly composed of spawning population, most of which are adults with larger size, and summer is composed of baited population, mostly young fish with smaller size. The horizontal distribution of fish population is related to the variation of water masses in different seasons in Fujian coastal waters. In spring, the fishes are concentrated in the outer sea area where the coastal waters of Fujian and Zhejiang provinces meet with the warm water of the Strait, and the fishes in summer are mostly concentrated in the coastal waters with abundant nutrients and controlled coastal currents. The distribution characteristics of fish quantity in different seasons are basically consistent with the distribution of dominant species.
【作者单位】：中国水产科学研究院东海水产研究所农业部海洋与河口渔业重点开放实验室;上海海洋大学海洋科学学院;
【基金】：国家自然科学基金项目(41176131) 国家重点基础研究发展计划(“973”)项目(2010CB428705)~~
【分类号】：S932;P731.16

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