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Bisoniana LXVIII. Comparative winter bioenergetics of American bison, yak, Scottish highland and Hereford calves

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Keywords
  • Bioenergetics
  • Bison Bison
  • Critical Temperature
  • Hereford Calves
  • Metabolic Rate
  • Thermal Insulation
  • Jak
  • BydłO Domowe
  • Bizon Amerykański

Abstract

American bison, yak, Scottish Highland and Hereford calves were used in a comparative study of metabolic responses to temperature of 20, 0 and -30°C. Metabolic rates were lowest in the bison, highest in the Herefords and intermediate in the Highland and yak. Przeprowadzono porównawcze badania nad zapotrzebowaniem energetycznym u bizona, jaka oraz bydła (ras - Scottish Highland i Hereford) w temperaturach 20, 0 i -30°C (Tabela 1). Tempo metabolizmu było najniższe u bizona, najwyższe u bydła rasy Hereford, a pośrednie u jaka i bydła rasy Scottish Highland (Tabela 2).

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