종빈마의 서열이 자마의 상동증 및 섭식행위 억제에 따른 반응행동에 미치는 영향
Effect of the Power Ranking of Mares on the Stereotypies and the Response Behaviors Against Restraining of the Desire to Eat in the Offspring of Haflinger Horse
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본 연구는 하프링거(Haflinger) 종빈마 3두에서 태어난 자마(F1) 각각 3두씩(2-4년령), 총 9두를 이용하여 종빈마의 서열(상, 중, 하)에 따른 자마의 상동증 양상과 섭식행위 억제 시 나타내는 반응행동을 관찰해 보고자 수행되었다. 종빈마들은 구강 상동증과 운동성 상동증 행동을 전혀 하지 않았으나 자마의 경우, 종빈마 서열이 높을수록 구강 상동증 종류도 다양하고 지속시간도 길었다(p<0.05). 상위서열 자마는 3, 4세 때까지도 구강 상동증을 활발하게 지속하는 것으로 나타났지만 석벽, 웅벽 및 선회벽과 같은 고질적인 운동성 상동증으로 진행되는 개체는 없었다. 자마의 섭식행위 억제에 따른 반응행동도 종빈마의 서열이 높을수록 구강 및 운동성 반응행동의 빈도수가 증가하였다(p<0.05). 결론적으로, 본 시험에서 나타난 자마의 구강 상동증은 성장과정 중에 발생하는 특징적인 행동이지만 승용마로 육성하는 경우, 종빈마의 서열이 높은 자마이거나 스트레스에 대한 반응행동이 지나친 자마는 마방 내 구강행동을 주의 깊게 관찰하여 상동증 초기에 행동수정을 하는 것이 바람직할 것으로 판단된다.
Abstract
This study was conducted to investigate the effect of the power ranking of mares on their offspring’s stereotypies and response behaviors against a restraining of their desire to eat. Nine horses (2-4 years old) - three offspring born from three Haflinger mares over 3 years - were assigned to three experimental groups (High, Middle, Low) divided by the power ranking of mares. Three mares had no oral or locomotor stereotypic behaviors, but the higher the power ranking of mares, the more diverse and longer the duration of the oral stereotypies of their offspring (p<0.05). Although the offspring born from the high-ranking mare vigorously continued oral stereotypies until 3-4 years of age, there were no individuals that progressed to chronic locomotor stereotypies such as crib-biting, weaving, and box-walking. With an increase in the power ranking of the mare, the response of her offspring to the restraining of the eating desire (measured in terms of the frequency of the oral and locomotor stereotypies) increased (p<0.05). In conclusion, the oral stereotypies shown in this study are characteristic behaviors that occur during the growth process. However, in the case of riding horses, the offspring of a high-power ranking mare and/or one that reacted excessively against restrains, may be better observed and treated in a stall to manage stereotypic behaviors and correct the behaviors at their initial stage.
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