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

Comparison of age and growth of grass and silver carp above and below Changzhou Dam in the Pearl River, China

文献类型： 外文期刊

作者： Huang, Yanfei 1 ; Liu, Yue 1 ; Yang, Yaqin 1 ; Yu, Cong 1 ; Hu, Minghao 1 ; Li, Jie 2 ;

作者机构： 1.Hunan Univ Arts & Sci, Coll Life & Environm Sci, Key Lab Hlth Aquaculture & Prod Proc Dongting Lake, Aquat Biol Resources Monitoring Stn Yuanjiang Rive, Changde, Peoples R China

2.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Dept Fishery Resources & Ecol, Guangzhou, Peoples R China

3.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Dept Fishery Resources & Ecol, Guangzhou 510380, Peoples R China

关键词： Otolith; life history traits; dam; four major Chinese carp; the Pearl River

期刊名称：JOURNAL OF FRESHWATER ECOLOGY （ 影响因子：1.3； 五年影响因子：1.5 ）

ISSN： 0270-5060

年卷期： 2023 年 38 卷 1 期

页码：

收录情况： SCI

摘要： The life cycles of potamodromous fishes are generally interrupted by the presence of a dam, and populations often display different life history traits between upstream and downstream. This study compared the age and growth rates of grass carp and silver carp above and below Changzhou Dam in the Pearl River. Standard length (SL) composition and back-calculated SL at ages one and two years were greater for grass carp upstream than for downstream individuals; and the length-weight relationship differed between upstream and downstream populations, while the sex ratio, age structure and growth were not significantly different. For silver carp, only SL compositions differed between upstream and downstream populations; sex ratio, age structure, SL-at-age and growth rates were similar. Mean SL-at-age and growth rates of both species were lower at high latitudes than at middle and low latitudes, and populations in the Yangtze River had greater mean SL-at-ages and faster growth relative to silver carp at low latitudes. There were no differences in mean SL or growth among populations at middle and low latitudes. For grass carp, age and growth varied with small-scale ecological processes and regions or latitude, while for silver carp, such variations were proportionate to latitude and the large-scale geographical range. This study provides not only guidelines for fisheries management and conservation of exploited potamodromous fishes, but also insights into the relationship between life history trait variation and adaptive capacity.

  • 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