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The effect of environmental temperature on sebum composition in tropical and temperate breeds of cattle

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Lipids

Abstract

This study compared the effect of environmental temperature on sebum composition in 2 breeds of cattle, British (SH) and Brahman (GB), which differ in their abilities to tolerate heat. By long-term exposure of both breeds to environmental temperatures of 24 C and 32 C and the more heat-tolerant GB breed to 38 C, it was possible to make breed comparison at (a) different body temperatures, i.e, when all animals were exposed to the same environmental temperature, and (b), at the same body temperature, i.e., when the 2 breeds were exposed to different ambient temperatures. The composition of sebum excreted to saturation level on the skin surface was determined. At the same body temperatures, the amounts of fatty acids in each lipid class were higher in GB than in SH animals except during hyperthermia when the amounts of triglyceride fatty acids were similar in both breeds. The total amounts of individual fatty acids except 14∶1, 16∶1, 20∶0 and 14∶OH were higher in both breeds at 32 C than at 24 C. The GB cattle excreted more essential fatty acids (EFA) than the SH cattle at 24 C and at 32 C. There was a significant genotype by environment interaction in the amounts of EFA partitioned between triglycerides and wax esters; in GB cattle, the amount of EFA excreted in triglycerides decreased whereas the amount excreted in wax esters increased with rising body temperature.

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Authors and Affiliations

  1. C.S.I.R.O., Division of Animal Production, Tropical Cattle Research Centre, PO Box 545, 4701, North Rockhampton, Old, Australia

    J. C. O'Kelly & H. P. Reich

Authors
  1. J. C. O'Kelly
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  2. H. P. Reich
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O'Kelly, J.C., Reich, H.P. The effect of environmental temperature on sebum composition in tropical and temperate breeds of cattle. Lipids 17, 19–26 (1982). https://doi.org/10.1007/BF02535117

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  • DOI: https://doi.org/10.1007/BF02535117

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