競争馬の体重と競争能力との関係  [in Japanese] Trends in the relationships of racing performance and body weight in race horse  [in Japanese]

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Author(s)

    • 常本 建輔 [他] TSUNEMOTO Kensuke
    • 帯広畜産大学畜産管理学科家畜育種増殖学研究室 Laboratory of Animal Genetics and Reproduction, Department of Animal Production and Agricultural Economics, Obihiro, University of Agric. & Vet. Med. Obihiro
    • 鈴木 三義 SUZUKI Mitsuyoshi
    • 帯広畜産大学畜産管理学科家畜育種増殖学研究室 Laboratory of Animal Genetics and Reproduction, Department of Animal Production and Agricultural Economics, Obihiro, University of Agric. & Vet. Med. Obihiro
    • 三好 俊三 MIYOSHI Shunzo
    • 帯広畜産大学畜産管理学科家畜育種増殖学研究室 Laboratory of Animal Genetics and Reproduction, Department of Animal Production and Agricultural Economics, Obihiro, University of Agric. & Vet. Med. Obihiro
    • 光本 孝次 MITSUMOTO Takatsugu
    • 帯広畜産大学畜産管理学科家畜育種増殖学研究室 Laboratory of Animal Genetics and Reproduction, Department of Animal Production and Agricultural Economics, Obihiro, University of Agric. & Vet. Med. Obihiro
    • 小栗 紀彦 OGURI Norihiko
    • 帯広畜産大学畜産管理学科総合馬学研究室 Laboratory of Horse Producton, ibid, Department of Animal Production and Agricultural Economics, Obihiro, University of Agric. & Vet. Med. Obihiro

Abstract

競争馬の競争能力は,走行タイム,獲得賞金,ハンデキャップなどを指標として評価され,他の形質との関係が分析されている。本研究では,競争能力の指標として獲得賞金を取り上げ,それを4つのクラスに分類し,競争馬の体重と競争能力との関係を検討した。さらに,過去20年間の競争馬の体格的な変化についても検討した。日本中央競馬会発行の『1990競争馬成績書』から4才馬雄784頭,雌482頭の体重の記録と4才クラシックレース(皐月賞,ダービー,菊花賞,桜花賞,オークス,エリザベス女王杯)における過去20年間の全出走馬の体重の記録による2つのデータセットを用いた。分析Iでは,馬体重に影響を及ぼす効果を推定した。要因としては,誕生月,獲得賞金クラス,出走距離,および性を考慮し,最小二乗分析を行った。分析IIでは,競争成績と馬体重との関係を過去20年間の競争馬の平均体重の推移から検討した。考慮した要因は全て有意であった(P<0.01)。要因の水準間では,4月,および5月生まれの馬は2月,および3月生まれの馬より体重が重く,競争能力の高い馬は体重が重い傾向にあった。性別では雄は雌より約20kg重かった。クラシックレースにおいても,成績上位馬は成績下位馬より体重が重いものが多く存在した。また,過去20年間に競争馬の体格には大型化の傾向が認あられた。

Racing performance in race horse has been measured by time of finish, earnings, handicap weight with etc. The associations of certain traits on racing performance has been studied. The objectives of this study were to evaluate some associations of body weight and earnings classified for four classes and to estimate trends in the changes in body weight in the last two decades. Two data file sets were used for the analysis. These were the 1990 Race Horse Records by the Japan Racing Association and all the body weight and racing records from the Classic Races in Japan for the last two decades.The Statistical model in the least squaresanalysis included birth records, class of earnings, distances, sex, and body weight. The relationship between body weight and racing performance was analysed by regression. The influences of all factors considered in this study were found to be statistically significant. Body weights of birth in April and May were significantly higher than those in February and March. Body weights of stallions were larger than mares. Sex differences in body weight were estimated to be about 20kg. High racing performers had a tendency to have larger body weights. This trend was observed also in the Classic Races in Japan. A trend for body weight to steadily increase was observed during the last two decades.

Journal

  • Research bulletin of Obihiro University. Natural science

    Research bulletin of Obihiro University. Natural science 18(1), p1-9, 1992-11

    Obihiro University of Agriculture and Veterinary Medicine

Codes

  • NII Article ID (NAID)
    110006458022
  • NII NACSIS-CAT ID (NCID)
    AN1039999X
  • Text Lang
    JPN
  • Article Type
    Departmental Bulletin Paper
  • Journal Type
    大学紀要
  • ISSN
    09193359
  • NDL Article ID
    3842472
  • NDL Source Classification
    RB82(畜産--家畜--馬)
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-435
  • Data Source
    NDL  NII-ELS  IR 
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