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  11. Analysis Of The Genetic Structure Of The Introduced Clearhead Icefish (protosalanx Chinensis) Populations In Northern China

Analysis of the genetic structure of the introduced clearhead icefish (Protosalanx chinensis) populations in northern China

Yi Zheng1,2,3, Fujiang Tang1,3, Xianhu Zheng1,2

  • 1Scientific Observing and Experimental Station of Fishery Resources and Environment in Heilongjiang River Basin, Ministry of Agriculture and Rural Affairs, Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Harbin, China.

Journal of Fish Biology
|March 6, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

Genetic diversity in introduced Protosalanx chinensis populations in China varies, with the indigenous Taihu Lake population showing the highest diversity. Management strategies should focus on ecological measures for effective population control.

Area of Science:

  • Aquatic Ecology
  • Population Genetics
  • Conservation Biology

Background:

  • Introduced species can exhibit significant adaptation and genetic divergence from indigenous populations.
  • The indigenous Protosalanx chinensis population displays high genetic diversity, but introduced populations in Northeast China remain understudied.
  • Northeast China is a major global production area for Protosalanx chinensis.

Purpose of the Study:

  • To investigate the genetic diversity and differentiation of introduced Protosalanx chinensis populations in Northeast China.
  • To compare the genetic makeup of introduced populations with the indigenous Taihu Lake population.
  • To provide insights for the sustainable management and utilization of Protosalanx chinensis resources.

Main Methods:

  • Collected 556 Protosalanx chinensis individuals from Lianhuan Lake, Xingkai Lake, Shuifeng Reservoir, and Taihu Lake between 2016-2021.
Keywords:
Salangidaediversity assessmentestuaryfloodplain

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  • Analyzed genetic diversity using haplotype and nucleotide diversity metrics.
  • Assessed genetic differentiation using Fst and genetic distance analyses.

    • Main Results:

    • Detected 36 unique haplotypes across the studied populations.
    • Haplotype diversity ranged from 0.455 to 0.890, with nucleotide diversity from 0.0005 to 0.0032.
    • The indigenous Taihu Lake population exhibited the highest genetic diversity, followed by Shuifeng Reservoir, while Xingkai Lake and Lianhuan Lake showed lower diversity.
    • Significant genetic differentiation was observed between the indigenous Taihu Lake population and the introduced populations.
    • No correlation was found between population size/stability and genetic diversity, suggesting ecological management is key.

    Conclusions:

    • Introduced Protosalanx chinensis populations in Northeast China exhibit varying levels of genetic diversity, with significant divergence from the indigenous population.
    • Ecological management measures are crucial for the effective dynamics and conservation of Protosalanx chinensis populations.
    • Findings support informed strategies for the rational utilization and management of this commercially important fish species.
    molecular markers