オットセイの捕獲と取り扱い方法  [in Japanese] Methods for capturing and handling northern fur seals (Callorhinus ursinus)  [in Japanese]

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Abstract

オットセイ(キタオットセイ,<i>Callorhinus ursinus</i>)の科学調査や漂着,混獲個体の適切な処置の際に必要とされる捕獲と取り扱いの方法を,陸上と海上に分けて解説する.陸上では,雌獣や小型の雄獣(体重70 kg未満)であれば,絞め縄のついた棒か大型のタモ網を用いて捕獲し,保定具を用いて物理的に不動化することができるが,大型の成獣雄の取り扱いには,化学的不動化法を用いざるを得ない.捕獲と保定の間は絶えず呼吸状態を確認することが大切である.また,繁殖島上でオットセイは密集した社会的な集団を形成するため,捕獲に際して上陸集団への撹乱を最小にし,動物と作業者の安全を確保し得る接近,捕獲,保定の方法を選ばなければならない.処置後の捕獲個体が他個体との社会的関係を維持できるよう,元の状態に安全に戻すことも重要である.一方海上では,摂餌域で流し刺網を使った生け捕りが可能である.日本国内ではオットセイの捕獲と所持は国内法により規制されており,調査のための捕獲を行うには,政府の許可を得る必要がある.<br>

This paper describes capture and handling methods of northern fur seals (<i>Callorhinus ursinus</i>) on land and at sea for scientific research and for proper treatment of individuals stranded or caught incidentally in fisheries. Females and smaller males (c.a. <70 kg in body weight) can be caught on land by using a noose pole or a hoop net, and physically immobilized with a restraint board. Handling of large males requires chemical immobilization. Careful attention should be paid to the respiratory condition of animals during capture and immobilization. On breeding lands where northern fur seals form dense social aggregation, proper methods of approach, capture and restraint should be chosen to minimize disturbance to the breeding aggregation and to ensure the safety of animals and field workers. Captured animals should be returned safely to the original location so that they can retain social relationships with other individuals. Live capture of northern fur seals at sea is possible using gillnets in foraging areas. Since capture and possession of northern fur seals are restricted by Japanese domestic law, government permission is required to capture northern fur seals for scientific research.<br>

Journal

  • Honyurui Kagaku (Mammalian Science)

    Honyurui Kagaku (Mammalian Science) 51(1), 71-78, 2011-06-30

    The Mammal Society of Japan

References:  12

Codes

  • NII Article ID (NAID)
    10029773238
  • NII NACSIS-CAT ID (NCID)
    AN00231656
  • Text Lang
    JPN
  • Article Type
    NOT
  • ISSN
    0385437X
  • NDL Article ID
    11173434
  • NDL Source Classification
    ZR4(科学技術--生物学--動物)
  • NDL Call No.
    Z18-1160
  • Data Source
    CJP  NDL  J-STAGE 
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