Freshwater fishes in Lake Izunuma-Uchinuma basin, Japan: distribution patterns of native species and invasive species

DOI 1 Citations
  • Fujimoto Yasufumi
    Miyagi Prefectural Izunuma-Uchinuma Environmental Foundation.
  • Kawagishi Motoyoshi
    Laboratory of Molecular Embryology，Department of Biology, School of Sciences，Kitasato University.
  • Shindo Kentaro
    Miyagi Prefectural Izunuma-Uchinuma Environmental Foundation.

Bibliographic Information

Other Title
  • 伊豆沼・内沼集水域の魚類相：在来魚と外来魚の分布

Description

<p>In Lake Izunuma-Uchinuma basin, freshwater fishes comprised 12 families with 36 species. Most belong to non-diadromous freshwater fishes including endemic species in eastern Japan such as Acheilognathus typus, A. melanogaster, Pseudorasbora pumila, and Pseudobagrus tokiensis. The basin consists of open water such as Lake Izunuma-Uchinuma and influent rivers, and closed waters such as irrigation ponds. In Lake Izunuma-Uchinuma and the influent rivers, the fish communities showed lower density of native fishes due to influence of non-native largemouth bass. In the irrigation ponds, the existence or nonexistence of largemouth bass affected to the fish communities. The ponds with largemouth bass had a degraded native fish community, whereas the ponds without largemouth bass had many native species. These native species included several rare species that had become extinct in Lake Izunuma-Uchinuma. These results indicated that irrigation ponds served a role as refugia for rare fishes when the influence of invasive species became widespread.</p>

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Details 詳細情報について

  • CRID
    1390282680800529024
  • NII Article ID
    130006199924
  • DOI
    10.20745/izu.2.0_13
  • ISSN
    24242101
    18819559
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
    • Crossref
  • Abstract License Flag
    Disallowed

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