A note on the circadian rhythm and feeding behaviour of sheep fitted with a lightweight GPS collar

Ian A.R. Hulbert*, John T.B. Wyllie, Anthony Waterhouse, John French, David McNulty

*Corresponding author for this work

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The circadian rhythm and feeding behaviour (bite rate) of 16 Scottish Blackface ewes of which eight were fitted with a lightweight (863 g) GPS collar were examined. The collar consisted of a leather harness and a 0.5 1 aluminium box and represented 2.2% of the average body mass of the study ewes. No differences in circadian rhythm and bite rate were found between ewes fitted with the collars and ewes that were not: The relevance of using collar weight as a proportion of body mass as a guide to gauge its impact on the feeding behaviour of small ruminant (35-75 kg) herbivores is questioned.

Original languageEnglish
Pages (from-to)359-364
Number of pages6
JournalApplied Animal Behaviour Science
Issue number4
Publication statusPrint publication - 27 Nov 1998



  • Circadian rhythm
  • Feeding behaviour
  • GPS
  • Sheep feeding and nutrition

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