热带海洋学报 ›› 2016, Vol. 35 ›› Issue (3): 65-71.doi: 10.11978/2015072

• 海洋生物学 • 上一篇    下一篇

南日列岛西南部海区鱼类数量变化及其与水团关系*

管伟1, 2, 陈佳杰1, 徐兆礼1   

  1. 1. 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 200090;
    2. 上海海洋大学海洋科学学院, 上海 201306
  • 收稿日期:2015-05-21 出版日期:2016-05-29 发布日期:2016-05-27
  • 通讯作者: 徐兆礼。E-mail: xiaomin1957@126.com
  • 作者简介:管伟(1991—), 男, 安徽省广德县人, 硕士研究生, 从事渔业资源研究及海洋环境影响评价。E-mail: guanwei11@126.com
  • 基金资助:
    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)

The distribution and seasonal variation of fish populations in the southwest waters of the Nanri Islands and their relationships with the variation of water masses*

GUAN Wei1, 2, CHEN Jiajie1, XU Zhaoli1   

  1. 1. East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key and Open Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, Shanghai 200090, China;
    2. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
  • Received:2015-05-21 Online:2016-05-29 Published:2016-05-27
  • Contact: XU Zhaoli. E-mail: xiaomin1957@126.comt
  • Supported by:
    National Natural Science Foundation of China (41176131); National Key Basic Research and Development Program (‘973’ Program)(2010CB428705)

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17.3×103尾·km-2、255.00×103尾·km-2和22.6×103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。

关键词: 海峡暖水, 闽浙沿岸水, 鱼类, 优势种, 水团, 饵料

Abstract: To detect the relationship between horizontal distribution of fish assembles and water masses or between seasonal distribution of fish assembles and water masses, three fish trawl surveys were conducted in the southwest waters of the Nanri Islands in December 2009 and in April and August 2010. Density and distribution pattern of fish assemblages, body length, body weight, juvenile ratio, dominant species, index of relative importance, and contribution to the total number of dominant species were analyzed in the study. The results showed that fish densities in terms of both weight and number were higher in summer (2599.60 kg·km-2, 22.6×103 ind·km-2) than those in spring (601.26 kg·km-2, 17.3×103 ind·km-2) and winter (730.36 kg·km-2, 22.6×103 ind·km-2). The average body length of fish was the highest in spring (14.95 cm), while the average body weight was the highest in winter (49.76 g). The proportion of juvenile was the highest in summer (as high as 81.72%). The variation in distribution pattern and biological parameters of fish assembles was probably associated with spawning and forging activities of fish. For example, it was mainly composed of spawning adult assembles in spring, while foraging juveniles were predominant in summer. Distribution pattern of fish assemblages was related to the seasonal variation in water mass and food availability in the coast water of Fujian. Fish densities were higher on the offshore side of Zhejiang-Fujian coastal water and Taiwan Strait warm current water. While in summer fish was more abundant in the nearshore region where food was particularly abundant. The distribution pattern of fish assemblages was consistent with the distribution pattern of dominant fish species.

Key words: Taiwan strait warm current water, Zhejiang-Fujian coastal water, fish assemblage, dominant species, water mass, forage

中图分类号: 

  • P745.27