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

1978


ISSN/ISBN: 0001-7051
Accession: 005002892

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Abstract
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 -30.degree. 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.