Distribution and habitats of Carassius auratus in the Ryukyu Archipelago: comparisons between indigenous and introduced populations

DOI
  • Takada Mikumi
    Department of Marine and Bioscience, Atmosphere and Ocean Research Institute, The University of Tokyo
  • Tachihara Katsunori
    琉球大学理学部海洋自然科学科
  • Nishida Mutsumi
    Department of Marine and Bioscience, Atmosphere and Ocean Research Institute, The University of Tokyo

Bibliographic Information

Other Title
  • 琉球列島におけるフナの分布と生息場所：在来フナと移殖フナの比較

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Abstract

Carassius auratus in the Ryukyu Archipelago includes both indigenous and introduced populations which can be discriminated from each other by mitochondrial DNA (mtDNA) haplotyping. MtDNA haplotyping of 485 fish from38 water systems on 11 islands within the Archipelago, showed them to comprise254 (52%) indigenous and 231 (48%) introduced individuals. Indigenous specimens were widespread throughout the Ryukyus, mainly inhabiting natural water systems. Introduced specimens were encountered sporadically, mainly in artificial water systems, especially in reservoirs. Ploidy examination by flow cytometry showed that indigenous populations comprised only diploid or diploid and triploid fish, whereas introduced populations often comprise only triploids. The fact that C. auratus was not found on some islands surveyed, despite their former presence being confirmed, suggested recent decreases of C. auratus and highlighted the importance of future conservation of indigenous Ryukyuan C. auratus.

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Details 詳細情報について

  • CRID
    1390001205512940160
  • NII Article ID
    130003397785
  • NII Book ID
    AN00063212
  • DOI
    10.11369/jji.57.113
  • ISSN
    18847374
    00215090
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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