窒素・炭素安定同位体によるツキノワグマ捕獲個体の養魚場ニジマス加害履歴の推定 Carbon and nitrogen stable isotope evidence for the involvement of a captured Asiatic black bear in damages at a rainbow trout farm

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著者

    • 泉山 茂之 [他] IZUMIYAMA Shigeyuki
    • 信州大学農学部附属アルプス圏フィールド科学教育センター Education and Research Center of Alpine Field Science, Faculty of Agriculture, Shinshu University
    • 楊 宗興 YOH Muneoki
    • 東京農工大学大学院共生科学技術研究部 Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology

抄録

An adult male Asiatic black bear (<i>Ursus thibetanus</i>), 105 kg in body weight and 130 cm in total length, was captured at a fish farm in Miyadamura village, Nagano Prefecture, Japan in June 2005, due to its nuisance activity. We analyzed δ<sup>13</sup>C and δ<sup>15</sup>N in the hairs and plasma of the bear and in the muscles of rainbow trouts (<i>Oncorhynchus mykiss</i>) at the farm to discern whether the bear was actually involved in the farm damages. Both δ<sup>13</sup>C and δ<sup>15</sup>N values in the hairs and plasma were similar to those in rainbow trout muscles, confirming that the bear indeed ate a considerable number of the farm's rainbow trouts. The δ<sup>13</sup>C and δ<sup>15</sup>N values of serum were closer to those of the trout muscles than those of the hairs, indicating that the bear depended heavily on trouts in the spring of 2005 in comparison with the previous year. Moreover, stable isotope levels in the tips of the hairs were closer to those of trout muscles than those at the bases of the hairs. This suggests that the bear depended much more heavily on trouts in the previous spring than in the previous fall.<br>

収録刊行物

  • 哺乳類科学 = Mammalian Science

    哺乳類科学 = Mammalian Science 47(1), 19-23, 2007-06-30

    日本哺乳類学会

参考文献:  18件中 1-18件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10019587180
  • NII書誌ID(NCID)
    AN00231656
  • 本文言語コード
    JPN
  • 資料種別
    SHO
  • ISSN
    0385437X
  • NDL 記事登録ID
    8881975
  • NDL 雑誌分類
    ZR4(科学技術--生物学--動物)
  • NDL 請求記号
    Z18-1160
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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