您好，欢迎访问中国水产科学研究院 机构知识库！
中国水产科学研究院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Age Structure, Growth, and Sex Ratio of Coilia nasus in the Lower Yangtze River and the Estuary During the Initial Stage of Fishing Moratorium

文献类型： 外文期刊

作者： Guo, Hongyi 1 ; Zhang, Xuguang 2 ; Zhang, Ya 3 ; Liu, Kai 4 ;

作者机构： 1.Shanghai Ocean Univ, Dept Fisheries & Life Sci, Shanghai, Peoples R China

2.Shanghai Ocean Univ, Engn Technol Res Ctr Marine Ranching, Shanghai, Peoples R China

3.Shanghai Ocean Univ, Shanghai Univ Key Lab Marine Anim Taxon & Evolut, Shanghai, Peoples R China

4.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Freshwater Fisheries & Germplasm Resources, Minist Agr & Rural Affairs, Wuxi, Peoples R China

关键词： age structure; growth parameters; Japanese grenadier anchovy; sex ratio

期刊名称：JOURNAL OF APPLIED ICHTHYOLOGY （ 影响因子：0.7； 五年影响因子：1.0 ）

ISSN： 0175-8659

年卷期： 2025 年 2025 卷 1 期

页码：

收录情况： SCI

摘要： The comprehensive 10-year fishing moratorium implemented in the Yangtze River Basin since 2021 provides a unique opportunity to evaluate the recovery of threatened fish populations. This study assessed the recovery status of Coilia nasus in the lower reaches of the Yangtze River during the fourth year of the moratorium through analysis of age structure, growth parameters, and sex ratio. Field investigations were conducted at two strategic locations (Chongming and Taizhou) during the migration season (May-June 2024), yielding 3077 specimens. Results revealed significant improvements in population parameters, including increased mean age (2.64 years) and standard length (28.5 cm), alongside a higher proportion of age 3 and age 4 individuals (63.3%). Sex ratio analysis showed a pronounced female bias (3.19:1), with spatial variations between estuarine (4.99:1) and upstream (2.04:1) sites. Growth parameter analysis indicated a shift toward natural growth dynamics, with increased asymptotic length (L infinity) and altered growth rates (k) compared to premoratorium periods. Despite these positive indicators, the absence of five-year-old individuals and lower average length compared to historical records suggest incomplete recovery. Our findings provide evidence for the effectiveness of the fishing ban while highlighting the need for continued protection.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国水产科学研究院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台