Comparative winter bio energetics of american bison yak scottish highland and hereford calves

Christopherson, R.J.; Hudson, R.J.; Richmond, R.J.

Acta Theriologica 23(1-6): 49-54


ISSN/ISBN: 0001-7051
Accession: 005002892

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American bison (Bison bison), yak (Bos grunniens), Scottish Highland (Bos taurus) and Hereford calves, were used in a comparative study of metabolic responses to temperature of 20, 0 and C. Metabolic rates were lowest in the bison, highest in the Herefords and intermediate in the Highland and yak. Critical temperatures and thermal insulations as calculated from metabolic responses to 3 ambient temperatures suggested that the bison were most tolerant to cold and that the Herefords were least tolerant. Highland and yak were intermediate and comparable in this regard.