動物介在活動中のイヌの行動と尿中カテコールアミン濃度によるストレス評価  [in Japanese] Stress Assessment by Dogs' Behavior and Urinary Catecholamine Concentrations during Animal-assisted Activity  [in Japanese]

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Abstract

本研究では,高齢者入居施設への訪問型の動物介在活動を調査対象とし,活動中におけるイヌのストレス状態を,イヌの行動観察と尿中カテコールアミン濃度により評価した.1.5~5.3歳のイヌ6頭(雄2頭,雌4頭)を供試犬とし,普段の生活でイヌが落ち着いているとき(T1)と30~60分間運動した直後(T2),活動前日(T3),活動当日の朝(T4),活動直後(T5)の尿を採取し,尿中カテコールアミン濃度を測定した.実質的活動時間,高齢者との触れ合い時間,行動・姿勢の制御時間,イヌの体格の各要因が,イヌの行動(あくび,パンティング,鼻舐め,前肢挙げ,嗅ぎ,拒否姿勢)に及ぼす影響について解析した.尿中カテコールアミン濃度に関しては,尿採取の時期,イヌの体格の両要因が,尿中アドレナリン(A)濃度,尿中ノルアドレナリン(NA)濃度,尿中ドーパミン(DA)濃度に及ぼす影響について解析した.拒否姿勢の生起時間割合は,行動・姿勢の制御時間が120秒以上の場合において,30秒未満の場合よりも有意(P<0.05)に長かった.また,拒否姿勢の生起割合についても同様の傾向(P=0.06)がみられた.拒否姿勢の生起割合と生起時間割合は,小型犬(体重 : 3.6~5.0kg)において,大・中型犬(体重 : 16.4~28.0kg)よりも有意(共にP<0.05)に多く長かった.パンティングの生起割合と生起時間割合は,大・中型犬の方が小型犬よりも有意(共にP<0.05)に多く長かった.尿中A濃度は,T5がT1, T3, T4よりも有意(すべてP<0.05)に高かった.また,尿中NA濃度は,T5がT1よりも高い傾向(P=0.10)がみられた.以上の結果から,動物介在活動中のイヌには何らかの軽度の心理的ストレスが負荷されている可能性が示唆された.また,活動中のイヌの行動が体格によって影響を受けていることもわかった.

Stress states of dogs during an animal-assisted activity (AAA) in a nursing home were assessed by observing the dogs’ behavior and urinary catecholamine concentrations. Six dogs (two males and four females) aged 1.5-5.3 years were used. Urine was gathered when dogs were resting in the home (T1), after exercises for 30-60 minutes (T2), on the previous day of AAA (T3), in the morning of AAA (T4) and just after AAA (T5). Activity time during the dog was in front of elderly people with a volunteer, contacting time with elderly people during the dog was petted by elderly people or played with a ball and restricted time of movement and posture (RT) were measured. Effects of the length of these times and the body size of the dogs on their behavior such as yawning, panting, snout lick, paw-lifting, sniffing, and posture related to refusal (PR) were analyzed by MANOVA. Effects of each timing (T1-T5) of urine gathering and the body size on catecholamine concentrations were analyzed by ANOVA and the Tukey test. The proportion of time spent PR was significantly longer when RT was more than 120sec. compared to shorter than 30 sec. (P<0.05). RT effects on the frequency of PR tended to be in the same direction (P=0.06). Small dogs (BW : 3.6-5.0kg) showed significantly more and longer PR than large dogs (BW : 16.4-28.0kg) (both P<0.05). Large dogs showed significantly more and longer panting than small dogs (both P<0.05). The mean adrenaline concentration in T5 was significantly higher than in T1, T3, T4 (all P<0.05). The mean noradrenaline concentrations in T5 tended to be higher than in T1 (P=0.10). These results suggest that dogs experienced some degree of psychological stress during AAA. Body size determined some of the variation in the dogs’ behavior during AAA.

Journal

  • Nihon Chikusan Gakkaiho

    Nihon Chikusan Gakkaiho 74(3), 375-381, 2003-08-25

    Japanese Society of Animal Science

References:  29

Codes

  • NII Article ID (NAID)
    10025836767
  • NII NACSIS-CAT ID (NCID)
    AN00195188
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    1346907X
  • NDL Article ID
    6686172
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-348
  • Data Source
    CJP  NDL  J-STAGE 
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