A Study on the Grazing Behavior of Thoroughbred Colts Grazed in Pasture at Summer Season of Jeju Island

ByongTaeJeon,MyeongHwaKim,JaeHyunPark,SungJinKim,SiHeungSung,SangMooLeeandSangHoMoonABSTRACTThis study was carried out in thoroughbred colts grazed in pasture at summer season of Jeju island,Korea, from June 23 to 29 in 2007. We investigated the behavioral pattern of the thoroughbred colts(n=23) at the age of 3-year-old (n=11) and 1-year-old (n=12). The group behavioral pattern of thoroughbredcolts was different according to the age. It was shown that eating 56%, standing 23%, lying 10%, walking5%, running 2.5% and drinking 3% in the 1-year-old thoroughbred colts group. Especially, it wassignificantly individual difference (P<0.05) in the average behavioral expression ratio of 1-year-oldthoroughbred colts (n=3), which was eating 53%, standing 29%, lying 11%, walking 5%, drinking 1% andrunning 1%. On the other hand, it was investigated that eating 54%, standing 27%, walking 13%, runningand drinking 1.5%, lying 1% in the 3-year-old thoroughbred colts group. Also, the individual behavioralexpression ratio of the 3-year-old thoroughbred colts was eating 53%, standing 32%, walking 10%, runningand drinking 1%, which was a similar pattern to the result of 1-year-old colts. It is considered that this isthe first study regarding a pasturage action of a racehorse produced in Korea. These data cannot beenough, but this data will be based on the production of racehorses and fostered in the management.(Keywords : Colt, Grazing behavior, Pasture, Racehorse, Thoroughbred)

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