関東地方に生息するモツゴ地域個体群内の遺伝的多様性の評価及びそれに対するストレッサーの推定に関する研究 Evaluation of Population Genetic Structure of Pseudorasbora Parva in Kanto Region and Main Stressor Effects on Genetic Variability and Genotype

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著者

    • 亀田 豊 KAMEDA Yutaka
    • 横浜国立大学環境情報研究院 Graduate School of Environmental and Information Sciences, Yokohama National University
    • 益永 茂樹 MASUNAGA Shigeki
    • 横浜国立大学環境情報研究院 Graduate School of Environmental and Information Sciences, Yokohama National University

抄録

There is growing awareness of the need to evaluate the long-term effects of wildlife populations, not only in terms of the level of short-term effects on individuals, but also in terms of much subtler, multigenerational effects particularly for long-term conservation of ecosystems. Here, we show population genetic structure of <i>Pseudorasbora parva</i> in the Kanto region and estimate the main stressors to influencing genetic variability and genotype. Genetic diversity within a population was significant among sampling sites, but no significant relationship was detected between genetic diversity and contaminants, such as polycyclic aromatic hydrocarbons (PAHs) and heavy metals, because of many types of stress effects and random genetic drift. On the other hand, cluster analysis of the fluorescence intensity of individual DNA fragment profiles measured by amplified fragment length polymorphism (AFLP) analysis identified five genotypes: two existed in many sites in the Kanto region, and three existed in only a few sites. Genetic diversity or genotype proportion in a population at the sites where these two genotypes was dominant were also significantly related to dissolved PAH, dissolved fluoranthene, dissolved benzo[<i>k</i>]fluoranthene and benzo[<i>k</i>]fluoranthene concentrations in sediments. Finally, the population genetic structure in eight sites along the Nogawa river was evaluated. These results showed genetic diversity and genotype proportion changed discontinuously in some sites, because of changes in PAH concentration and limited migration.

収録刊行物

  • 水環境学会誌 = Journal of Japan Society on Water Environment  

    水環境学会誌 = Journal of Japan Society on Water Environment 29(9), 553-560, 2006-09-10 

    Japan Society on Water Environment

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各種コード

  • NII論文ID(NAID)
    10018051977
  • NII書誌ID(NCID)
    AN10372439
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09168958
  • NDL 記事登録ID
    8091329
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-1045
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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