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生态学杂志 ›› 2010, Vol. 29 ›› Issue (06): 1167-1174.

• 研究报告 • 上一篇    下一篇

黄海南部太平洋褶柔鱼种群结构与繁殖生物学

杨林林1,2;姜亚洲1;程家骅1**   

  1. 1农业部海洋与河口渔业资源及生态重点开放实验室,中国水产科学研究院东海水产研究所,上海 200090;2上海海洋大学海洋科学学院,上海 201306
  • 出版日期:2010-06-10 发布日期:2010-06-10

Population structure and reproductive biology of Todarodes pacificus in Southern Yellow Sea.

YANG Lin-lin1,2;JIANG Ya-zhou1;CHENG Jia-hua1   

  1. 1East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Marine and Estuarine Fisheries Resources and Ecology, Ministry of Agriculture, Shanghai 200090, China;2College of Marine Science and Technology, Shanghai Ocean University, Shanghai 201306, China
    .
  • Online:2010-06-10 Published:2010-06-10

摘要: 依据2008年11月—2009年9月黄海南部帆张网太平样褶柔鱼渔业调查资料,分析了太平样褶柔鱼胴长组成结构、性比、初次性成熟胴长以及胴长与体重关系等基础生物学参数的季节变化,阐述了该海域太平洋褶柔鱼种群结构动态及繁殖生物学特征。结果表明:太平洋褶柔鱼在该水域常年均有分布,其中秋、冬季以性成熟个体为主,春、夏季以幼体为主;该水域太平洋褶柔鱼雌性个体数量显著多于雄性,总性比为0.60,当胴长(LM)在190~280 mm范围内时,性比(rsex)与胴长之间的关系符合:rsex = 3×10-5LM1.8017;雌、雄个体的性腺成熟度均呈现随胴长增大而升高的趋势。该水域太平洋褶柔鱼个体的性腺体指数月变化显著,以秋、冬季较高,春、夏季较低,表明该水域太平洋褶柔鱼群体的繁殖季节主要集中在秋、冬季;性腺体指数与性腺成熟度(除Ⅴ期外)和胴长之间均存在正相关关系。雌性个体的初次性成熟胴长较大,为201.9 mm;雄性较小,为174.3 mm。不同性腺成熟度阶段,太平洋褶柔鱼胴长与体重的关系不同,在其个体生长发育后期,体重增加主要受性腺发育的影响。

关键词: 水稻, 挥发性信息化合物, 特征和功能, 害虫防治

Abstract: Based on the data of stow net survey in Southern Yellow Sea (SYS) from November 2008 to September 2009, this paper studied the population structure and reproductive biology of   Todarodes pacificus in the area, through the evaluation of the seasonal patterns in size structure, sex ratio (rsex), mantle length (LM) at first maturity, and relationships between LM and body weight. The individuals of T. pacificus were distributed in SYS all year round. In autumn and winter, T. pacificus population was mainly consisted of mature individuals, while in spring and summer, the population was mainly consisted of immature individuals. The number of females was significantly higher than that of males, with the total rsex being 0.60. When the LM ranged from 190-280 mm, the relationship between rsex and LM could be expressed as rsex=3×10-5LM1.8017. The maturity stage tended to be increased with LM. The monthly variation of the mean value of gonado-somatic index (GSI) for T. pacificus males and females was evident. The GSI approached the peak in autumn and winter, suggesting that the spawning of T. pacificus was mainly in autumn and winter. Both the GSI and the maturity stages (except Ⅴstage) were positively related to LM. The LM at first maturity for females and males was 201.9 mm and 174.3 mm, respectively. The relationship between LM and body weight differed from maturity stages. At the late development stage of T. pacificus, the increase in body weight was mainly due to gonad maturation rather than somatic growth.

Key words: Rice, Volatile infochemicals, Characteristic and function, Pest control