肉用牛の輸送ストレスに対する削蹄の効果  [in Japanese] Effects of Hoof Trimming on Hematological and Biochemical Variables during Transport-induced Stress in Japanese Black Cattle  [in Japanese]

Access this Article

Author(s)

Abstract

肉用牛の輸送ストレスに及ぼす削蹄の効果について検討した. 黒毛和種肥育牛41頭を削蹄群 (27頭) と無削蹄群 (14頭) に分けた. 削蹄群は6カ月ごとに削蹄され, 出荷3カ月前に最後の削蹄を行った一方で, 無削蹄群は肥育期間中にまったく削蹄されなかった. 出荷に伴うトラック輸送 (距離57.8km, 4時間) の前後で, 体重測定と血液および血液化学検査を行った. クレアチンホスホキナーゼ (CK) 活性およびコルチゾール値は輸送後に増加したが, いずれも, 削蹄群の値が無削蹄群に比べて低い値を示した. CK活性の変化は, 定期的な削蹄が牛蹄の負重機能に安定性を与え, 肥育後期の肉牛の筋肉にかかる侵襲を抑制する効果があることを示唆するものであった. また血清コルチゾール値の変化とあわせて, 肥育牛における定期的な削蹄は, 出荷時の輸送ストレスに対する抵抗性を高めることが明らかとなった.

The purpose of this study is to determine effects of hoof trimming on transport-induced stress in beef cattle. Forty-one Japanese black steers were randomly divided into 2 groups: trimmed group (n=27) and untrimmed group (n=14). In the trimmed group, hoof trimming was repeated every 6 months, with the final trimming performed 3 months before shipment. The untrimmed group was not trimmed at all until shipment time. Before and after truck transportation to the shipping destination (57.8 km, 4 hours), the cattle were weighed, and their blood was sampled for hematological and biochemical analysis. The indices of transport-induced stress were creatine phosphokinase (CK) and cortisol. In both groups, CK and cortisolincreased after transportation. Increase in the parameters was lower in the trimmed group than in the untrimmed group. Lower CK activity in the trimmed group suggests that the physical demand for posture support during transport in the vehicle was more restricted in thetrimmed group. Plasma cortisol increased less in the trimmed group than in the untrimmed group. This could mean that periodical trimming effectively inhibits transport-induced stress in beef cattle.

Journal

  • Journal of the Japan Veterinary Medical Association

    Journal of the Japan Veterinary Medical Association 54(11), 837-840, 2001-11-20

    Japan Veterinary Medical Association

References:  18

Codes

  • NII Article ID (NAID)
    10008023865
  • NII NACSIS-CAT ID (NCID)
    AN00191857
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    04466454
  • NDL Article ID
    5995101
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-352
  • Data Source
    CJP  NDL  J-STAGE  JASI 
Page Top