Using stable isotopes and trace elements for analyzing meta-population structure in the water system networks

• Project/Area Number: 26340089
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental and ecological symbiosis
• Research Institution: Hirosaki University
• Principal Investigator: AZUMA NOBUYUKI 弘前大学, 農学生命科学部, 教授 (40262977)
• Co-Investigator(Kenkyū-buntansha): 大竹 二雄 東京大学, 大学院農学生命科学研究科(農学部), 教授 (20160525) ; 渡邉 泉 東京農工大学, (連合)農学研究科(研究院), 准教授 (30302912)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 微量元素 / 安定同位体比 / 超個体群 / 移動 / 安定同位体 / 水系ネットワーク / 魚類 / 水生昆虫 / カワネズミ / 昆虫

Outline of Final Research Achievements

We conducted investigation to find the migration of stream organisms in the Iwaki River using stable isotopes and trace elements analysis. We found evidence that the populations in fishes and small mammalian which inhabited the tributaries of upstream of this river system were fragmented by artificial lake. But also, there were alternative evidence of spawning migration from the lake to upstream tributaries such as Ezo ugui, Tribolodon sachalinensis.
The aquatic insects could also be isolated in each stream because we obtained no positive evidences in flight migration by analyzing concentration values of each element in their bodies.

Research Products

• [Journal Article] 青森県西部におけるカワネズミの捕獲 (2017)
  • Author(s): 塩塚菜生・東信行
  • Journal Title: 白神研究 Volume: 印刷中
  • Peer Reviewed
• [Presentation] 青森県岩木川水系支流に生息する日本カワネズミの食性について (2016)
  • Author(s): 塩塚菜生・神崎東子・菊地亮太・佐藤 臨・中下留美子・東 信行
  • Organizer: 日本哺乳類学会2016年度大会
  • Place of Presentation: 筑波大学
  • Year and Date: 2016-09-15
• [Presentation] 微量元素およびストロンチウム安定同位体を用いたヒゲナガカワトビケラの発生地判別の可能性 (2016)
  • Author(s): 工藤誠也・井上博元・野田香織・渡邉 泉・申基澈・東 信行
  • Organizer: 応用生態工学会第20回大会
  • Place of Presentation: 東京大学
  • Year and Date: 2016-09-02
• [Presentation] ダム湖が及ぼす流程方向における物質循環の変化 (2015)
  • Author(s): 神崎東子・田村和也・工藤誠也・佐藤臨・井上博元・野田香織・池田紘士・中下留美子・渡邉 泉・東 信行
  • Organizer: 応用生態工学会第19回研究発表会
  • Place of Presentation: 福島県郡山
  • Year and Date: 2015-09-10
• [Presentation] Using Stable Isotopes to Determine Japanese Water Shrew Trophic Position in Headwater Food Webs and Importance of Continuity of Riverine Ecotone (2015)
  • Author(s): Nao Shiozuka, Touko Kanzaki, Mami T. Kazama, Rumiko Nakashita, Nobuyuki Azuma
  • Organizer: 5th International Wildlife Management Congress
  • Place of Presentation: 北海道札幌
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] Estimating the natal sites of clearwing moths by using trace elements and the invasive pattern of currant clearwing moth. (2015)
  • Author(s): Kudo, S., I. Watanabe, N. Azuma:
  • Organizer: Japan Geoscience Union Meeting. Chiba, 2015.
  • Place of Presentation: 千葉県幕張
  • Year and Date: 2015-05-25
• [Presentation] 微量元素を用いたヒゲナガカワトビケラの生息地環境評価と 個体群の動的構造解明 (2015)
  • Author(s): 工藤 誠也, 井上博元, 野田香織, 渡邉 泉, 東 信行
  • Organizer: 日本生態学会
  • Place of Presentation: 鹿児島
  • Year and Date: 2015-03-20