Body fatness affects feed intake of sheep at a given body weight

Journal of Animal Science
Bert J TolkampIlias Kyriazakis


In a 1-yr experiment, nutritional treatments were used to produce different combinations of BW and BCS in lambs. The experiment served to quantify the effects of BW and BCS on ADFI by sheep. Ewe lambs (n = 78) were assigned to treatment groups that had ad libitum access to one feed at a time. Three feeds were used: a medium-quality chopped hay (L), a pelleted feed based on oat feed (M), and a pelleted feed based on barley (H). Three groups received only one of these feeds throughout. Two groups first received H and then were switched to M when they reached a BW of 45 or 65 kg. Two groups first received L and then were switched to M or H after reaching a BW of 45 kg. Three groups first received H or M but were switched to L after reaching a BW of 45, 65, or 95 kg. Daily feed intake, BW, and BCS were recorded, and ME content of the feeds was estimated in a separate digestibility experiment. The lambs consuming M ate more (P < 0.001) feed than lambs consuming H, but this had no significant effects on ME intake or gain in BW or BCS. Animals that had had access to L were lean for their BW when switched to H or M and showed compensatory intake and gain. Animals switched from M or H to L all lost BCS; BW change depended on the BW at t...Continue Reading


Jun 21, 1992·Journal of Theoretical Biology·I Kyriazakis, G C Emmans
Dec 1, 1996·Journal of Animal Science·J J Ketelaars, B J Tolkamp
Apr 20, 2001·The Proceedings of the Nutrition Society·G Emmans, I Kyriazakis

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Jul 1, 2010·Animal : an International Journal of Animal Bioscience·B J Tolkamp
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Dec 15, 2010·The Veterinary Journal·Alexandra H A DugdaleCaroline McG Argo
Mar 27, 2007·The British Journal of Nutrition·Bert J TolkampIlias Kyriazakis
Feb 1, 2007·Animal : an International Journal of Animal Bioscience·N C Friggens, J R Newbold
Nov 10, 2009·Journal of Animal Science·R M Lewis, G C Emmans

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