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Evaluating fish spawning and nursery function along environmental gradients of a main tributary of Dongting Lake.

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Title: Evaluating fish spawning and nursery function along environmental gradients of a main tributary of Dongting Lake.
Authors: Huang, Yanfei1,2 (AUTHOR), Yang, Yaqin2 (AUTHOR), Luo, Yushuang2 (AUTHOR), Luo, Congqiang2 (AUTHOR), Liu, Liangguo2 (AUTHOR), Li, Deliang1 (AUTHOR) lidl@hunau.edu.cn
Source: Hydrobiologia. Oct2025, Vol. 852 Issue 17, p4387-4406. 20p.
Subjects: Fish spawning, Fish larvae, Migratory animals, Marine nurseries, Rapids, Hydrologic cycle, Spatial variation, Larvae
Geographic Terms: Dongting Lake (China)
Abstract: River-floodplain species often spend the early life history stages in a heterogeneous habitat. The present study examined ichthyoplankton in three habitats below Taoyuan Dam in the Yuanjiang River: lotic stretches, a transitional area, and West Dongting Lake during May to September 2021 and 2022. The peak egg density and species numbers were the highest in the lotic stretches, with eggs being at the blastula and gastrula stages. The peak larval density was the highest in the transitional area, with more river–lake migratory species. The egg and larval density was high in Dongting Lake, with most eggs being at the organogenesis stage. The dominating species showed different abundances among the three habitats. Larvae assemblage structures had no significant spatial and yearly differences and were dominated by short-distance migratory/limnophilic species with equilibrium/opportunistic strategy. Water discharge significantly affected the larval assemblage and the occurrence of dominant species. The results suggest that river–lake migratory species use the lotic stretches as spawning habitats and the transitional environments and the lake area as nursery grounds. A homogenization of larval communities at the three habitats indicated that small, opportunistic species are more adaptable to the altered hydrological regimes caused by cascading dams relative to large-sized, periodic ones. [ABSTRACT FROM AUTHOR]
Copyright of Hydrobiologia is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Evaluating fish spawning and nursery function along environmental gradients of a main tributary of Dongting Lake.
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  Data: <searchLink fieldCode="AR" term="%22Huang%2C+Yanfei%22">Huang, Yanfei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Yaqin%22">Yang, Yaqin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Luo%2C+Yushuang%22">Luo, Yushuang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Luo%2C+Congqiang%22">Luo, Congqiang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Liangguo%22">Liu, Liangguo</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Deliang%22">Li, Deliang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lidl@hunau.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Hydrobiologia%22">Hydrobiologia</searchLink>. Oct2025, Vol. 852 Issue 17, p4387-4406. 20p.
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  Data: <searchLink fieldCode="DE" term="%22Fish+spawning%22">Fish spawning</searchLink><br /><searchLink fieldCode="DE" term="%22Fish+larvae%22">Fish larvae</searchLink><br /><searchLink fieldCode="DE" term="%22Migratory+animals%22">Migratory animals</searchLink><br /><searchLink fieldCode="DE" term="%22Marine+nurseries%22">Marine nurseries</searchLink><br /><searchLink fieldCode="DE" term="%22Rapids%22">Rapids</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrologic+cycle%22">Hydrologic cycle</searchLink><br /><searchLink fieldCode="DE" term="%22Spatial+variation%22">Spatial variation</searchLink><br /><searchLink fieldCode="DE" term="%22Larvae%22">Larvae</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Dongting+Lake+%28China%29%22">Dongting Lake (China)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: River-floodplain species often spend the early life history stages in a heterogeneous habitat. The present study examined ichthyoplankton in three habitats below Taoyuan Dam in the Yuanjiang River: lotic stretches, a transitional area, and West Dongting Lake during May to September 2021 and 2022. The peak egg density and species numbers were the highest in the lotic stretches, with eggs being at the blastula and gastrula stages. The peak larval density was the highest in the transitional area, with more river–lake migratory species. The egg and larval density was high in Dongting Lake, with most eggs being at the organogenesis stage. The dominating species showed different abundances among the three habitats. Larvae assemblage structures had no significant spatial and yearly differences and were dominated by short-distance migratory/limnophilic species with equilibrium/opportunistic strategy. Water discharge significantly affected the larval assemblage and the occurrence of dominant species. The results suggest that river–lake migratory species use the lotic stretches as spawning habitats and the transitional environments and the lake area as nursery grounds. A homogenization of larval communities at the three habitats indicated that small, opportunistic species are more adaptable to the altered hydrological regimes caused by cascading dams relative to large-sized, periodic ones. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Hydrobiologia is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1007/s10750-025-05867-5
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 20
        StartPage: 4387
    Subjects:
      – SubjectFull: Fish spawning
        Type: general
      – SubjectFull: Fish larvae
        Type: general
      – SubjectFull: Migratory animals
        Type: general
      – SubjectFull: Marine nurseries
        Type: general
      – SubjectFull: Rapids
        Type: general
      – SubjectFull: Hydrologic cycle
        Type: general
      – SubjectFull: Spatial variation
        Type: general
      – SubjectFull: Larvae
        Type: general
      – SubjectFull: Dongting Lake (China)
        Type: general
    Titles:
      – TitleFull: Evaluating fish spawning and nursery function along environmental gradients of a main tributary of Dongting Lake.
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            NameFull: Huang, Yanfei
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            NameFull: Yang, Yaqin
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            NameFull: Luo, Yushuang
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            – D: 01
              M: 10
              Text: Oct2025
              Type: published
              Y: 2025
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              Value: 852
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