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Effect Of L-Thyroxin Hormone (T4) On Compensatory Growth In Broiler Chicks

Published online by Cambridge University Press:  20 November 2017

A. Hassanabadi  and
A. golian
A. Hassanabadi
Affiliation:
Department of Animal Science, Agriculture Faculty, University of Mashhad, PO Box 91775-1163, Mashhad, Iran
A. golian
Affiliation:
Department of Animal Science, University of Manitoba. Winnipeg, MB, Canada
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Extract

Purpose of researches in feed restriction area is improvement of feed efficiency, decrease of carcass fat content and abdominal fat pad size (Plavnik and Hurvitz,1991).Birds after early life feed restriction have less maintenance requirements due to decrease of heat increment and decrease of basal metabolic rate and specific dynamic action of food (Forsum et al.,1981).In many investigations, compensatory growth have not observed (Summers et al.,1990).It seems administration of Thyroid hormone after feed restriction can induce compensatory growth. The objective of the present study was to investigate the effect of early feed restriction and L-Thyroxin administration after early feed restriction on compensatory growth in broiler chickens.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2002 , 2002 , pp. 84
Copyright
Copyright © The British Society of Animal Science 2002

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References

Plavnik, I. and Hurwitz, S. 1991. Response of broiler chickens and turkey poults to feed restriction of varied severity during early life. Br. poult.sci. 32: 343–352 CrossRefGoogle ScholarPubMed
Forsum, E., Hillman, P. E. and Nesheim, M. C. 1981. Effect of energy restriction on total heat production, basal metabolic rate and specific dynamic action of food in rats. J. Nutr. 111: 1691–1697 CrossRefGoogle ScholarPubMed
Summers, J. D., Sparatt, D. and Atkinson, J. L. 1990. Restricted feeding and compensatory growth for broilers. Poult. Sci. 69: 1855–1861 CrossRefGoogle Scholar