Effects of different winter climates in Japan on body composition of young Thoroughbreds in training

The Journal of Veterinary Medical Science

article

Mutsuki ISHIMARU¹  Akira MATSUI¹  Kazuhiro SEKI¹  Kenji KOROSUE¹  Kentaro AKIYAMA³  Hirotoshi MIZUKAMI⁴  Toshinobu YOSHIDA⁵  Kazuyoshi TAYA⁶ 

[1] Hidaka Training and Research Center;Department of Animal Health, Faculty of Veterinary Medicine, Rakuno Gakuen University;Equine Department;Miyazaki Yearling Training Farm;Equine Research Institute;Laboratory of Veterinary Physiology, Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology

关键词: body composition;    body weight;    fat-free mass;    rump fat thickness;    Thoroughbred;   

DOI  :  10.1292/jvms.22-0378

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

Changes in the body composition of 50 Thoroughbreds colts and fillies, born between 2004 and 2010, were compared between those reared at the Hidaka Training and Research Center (Hidaka), Hokkaido, which is extremely cold in winter, and those reared at the Miyazaki Yearling Training Farm (Miyazaki), Kyushu, which is mildly cold in winter. The horses were divided into two sex groups and reared and trained in Hidaka or Miyazaki for 7 months from October of one year of age to April of two years of age. Body weight (BW), rump fat thickness (RFT), fat-free mass (FFM), and percentage of fat (%F) were used as parameters of body composition. This study revealed that BW and FFM were higher, and %F was lower in colts than in fillies at both training sites. Among colts, Miyazaki colts tended to have higher FFM values than Hidaka colts, and %F was significantly lower in Miyazaki colts than in Hidaka colts. Furthermore, from October to April, Miyazaki horses had a higher rate of increase in BW than Hidaka horses in both sexes and a higher rate of increase in FFM in colts. The higher rate of increase in FFM in Miyazaki colts suggests that training young Thoroughbreds in winter under mildly cold climate is more effective, than severely cold climate, particularly in colts.

【 授权许可】

Unknown