Ono Tetsushi, Inoue Yoichi, Hisaeda Keiichi, Yamada Yutaka, Hata Akihisa, Miyama Takako Shimokawa, Shibano Kenichi, Kitagawa Hitoshi, Ohzawa Emi, Iwata Eri
Faculty of Veterinary Medicine, Okayama University of Science, Ehime 794-8555, Japan.
Noma Horse Preservation Society, Ehime 794-0082, Japan.
J Equine Sci. 2021 Mar;32(1):21-25. doi: 10.1294/jes.32.21. Epub 2021 Mar 16.
This study aimed to evaluate the influence of seasons and sex on body size and hematological and biochemistry parameters of Noma horses, a native Japanese breed. Body size was larger in winter than in summer. Laboratory testing variables, including erythrocytic parameters and urea nitrogen, total cholesterol, and creatinine kinase levels, were higher in winter, while the eosinophil count was higher in summer. These seasonal differences may be related to increased energy consumption of horses due to heat stress. The higher eosinophil counts may have been related to the dermatitis observed in summer. Stallions tended to have smaller bodies compared with mares. Future studies are necessary to investigate the effect of stress in seasonal and sex-based groups.
本研究旨在评估季节和性别对日本本土品种能马的体型以及血液学和生物化学参数的影响。能马的体型在冬季比夏季更大。包括红细胞参数、尿素氮、总胆固醇和肌酸激酶水平在内的实验室检测变量在冬季较高，而嗜酸性粒细胞计数在夏季较高。这些季节差异可能与热应激导致马匹能量消耗增加有关。较高的嗜酸性粒细胞计数可能与夏季观察到的皮炎有关。与母马相比，种马的体型往往较小。未来有必要开展研究，调查季节性和基于性别的群体中应激的影响。
