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An investigation into the effect of tryptophan on tail chewing behaviour of growing pigs

Published online by Cambridge University Press:  20 November 2017

J. McIntyre  and
S.A. Edwards
J. McIntyre
Affiliation:
Department of Agriculture, University of Newcastle, King George VI Building, Newcastle upon Tyne, NE1 7RU.
S.A. Edwards
Affiliation:
Department of Agriculture, University of Newcastle, King George VI Building, Newcastle upon Tyne, NE1 7RU.
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Extract

Previous work (McIntyre and Edwards, 2001) revealed a significant correlation between plasma tryptophan (TRP) concentration and blood preference scores when pigs were fed a low CP diet. Increasing dietary TRP in rats causes increases in plasma and brain TRP, and brain serotonin concentration (Fernstrom and Wurtman, 1971), which appear to be highly localised to serotonin-containing neurones that may monitor the metabolic state and control behaviour. Uptake of TRP at the blood-brain barrier and serotonin level may also be increased by a higher TRP: LNAA (large neutral amino acids) ratio and level of dietary carbohydrate. This study aimed to determine if pigs fed diets differing in TRP and TRP: LNAA ratios differed in their behaviour or in their preference for blood during a model tail test.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2002 , 2002 , pp. 34
Copyright
Copyright © The British Society of Animal Science 2002

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References

Fernstrom, J.D. and Wurtman, R.J. 1971. Brain serotonin content: Increase following ingestion of carbohydrate diet. Science 174: 1023–1025 CrossRefGoogle ScholarPubMed
McIntyre, J. and Edwards, S.A. 2001. An investigation into the effect of different protein and energy intakes on the tail chewing behaviour of growing pigs. Proc. of the British Society of Animal Science, p. 176, Annual Meeting, YorkCrossRefGoogle Scholar