Absence of diurnal rhythm of plasma cortisol in Bos indicus (Boran) cattle

Authors

  • Getachew Abebe International Laboratory for Research on Animal Diseases (ILRAD), PO Box 30709, Nairobi, Kenya
  • Jim Scott International Laboratory for Research on Animal Diseases (ILRAD), PO Box 30709, Nairobi, Kenya
  • Robert Eley Institute of Primate Research (IPR), PO Box 24481, Nairobi, Kenya

Keywords:

Plasma cortisol, Diurnal rhythm, Boran cattle

Abstract

Plasma cortisol concentrations were determined by radioimmunoassay in blood samples which were taken at hourly intervals over 24 h from eight Bos indicus (Boran) cattle via indwelling jugular cannulae. Statistical analysis revealed no diurnal variation of cortisol in Boran cattle. Possible explanations for this are cited in the discussion.

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Issue

Volume 69 Number 1

Section

Research Papers