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Discriminating among novel foods: effects of energy provision on preferences of lambs for poor-quality foods

By J. J. Villalba, F. D. Provenza

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Abstract

A study was conducted to better understand how lambs discriminate among novel foods based on flavour and post-ingestive effects. The manner in which temporal sequence of food ingestion and post-ingestive feedback affected preference when lambs were fed flavoured wheat straw (a poorly nutritious novel food) immediately after eating milo grain (an energy-rich novel food), or after milo was infused in the rumen, was investigated. Lambs did not acquire a preference for flavoured straw when they were fed straw immediately after eating milo, evidently because they quickly discriminated the flavour-feedback effects of milo from straw. However, lambs infused with milo prior to eating straw in one flavour or another preferred the flavoured straw eaten after the milo infusions (P<0.001), and they preferred milo>flavoured straw eaten after milo infusions>flavoured straw eaten without milo infusions (P<0.001). Thus, when the flavour cue (milo) was removed, lambs did not discriminate milo from straw to as great a degree as when they first ate milo and then ate straw. The manner in which lambs quickly discriminated between novel foods - grape pomace-starch (70-30

Date 2000
Publication Title Applied Animal Behaviour Science
Volume 66
Issue 1/2
Pages 87-106
ISBN/ISSN 0168-1591
DOI 10.1016/S0168-1591(99)00066-0
Language English
Author Address Department of Rangeland Resources, Utah State University, Logan, UT 84322-5230, USA.
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Tags
  1. Animal behavior
  2. Animal nutrition
  3. Behavior and behavior mechanisms
  4. Deprivation
  5. Digestibility
  6. Energy
  7. Feedback
  8. Feeding behavior
  9. Flavor
  10. Foods
  11. Grains
  12. Grasses
  13. Intake
  14. Lambs
  15. Mammals
  16. peer-reviewed
  17. Plants
  18. rumen
  19. Ruminants
  20. Sheep
  21. starch
  22. Straw
  23. Toxins and toxicants
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  1. peer-reviewed