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Permanent link (DOI): https://doi.org/10.7939/R3NC5SG83

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Growth performance and carcass composition in beef heifers undergoing catch-up (compensatory) growth Open Access

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Author or creator
Yambayamba, E.
Price, M. A.
Additional contributors
Subject/Keyword
heifers
carcass composition
compensatory growth
realimentation
feed restriction
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Fifty-three Hereford crossbred heifers (211 ± 28 (mean ± SD) kg; 197 ± 13 d of age at day 1) were used to study catch-up growth and its effects on carcass composition. Five heifers were slaughtered on day 1; the remaining 48 were randomly penned in groups of six and assigned to treatments as follows: three pens to ad libitum feeding (target gain > 1.0 kg d−1); three pens to 2 mo of feed restriction (target gain 0.5 kg d−1); followed by realimentation; and two pens to 4 mo of feed restriction (target gain: 2 mo at 0.5 kg d−1 and 2 mo at 0.0 kg d−1) followed by realimentation. Animals from one pen were slaughtered from each treatment after 2 mo, after 4 mo, and at a final slaughter weight of about 410 kg. During the final period (4 mo to slaughter), growth rate was greater (P < 0.05) in the 4-mo than in the 2-mo restricted–realimented animals or the ad-libitum-fed animals (1.91 vs. 1.18 vs. 1.02 kg d−1), respectively. Feed restriction for 2 mo had no significant effect on the composition of the three-rib cut, but 4 mo of feed restriction was associated with significantly lower and higher (P < 0.05) proportions of fat and bone, respectively, in the three-rib cut. Muscle proportion was not affected by treatment. At the final slaughter weight, no significant differences were found among treatments in the tissue proportions of the three-rib cut. It is concluded that 2 or 4 mo of feed restriction, starting at 6 mo of age, has no permanent effect on a heifer's live weight or body composition.
Date created
1991
DOI
doi:10.7939/R3NC5SG83
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@1991 Yambayamba, E., Price, M. A. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Yambayamba, E. and Price, M.A. (1991). Growth performance and carcass composition in beef heifers undergoing catch-up (compensatory) growth. Canadian Journal of Animal Science, 71, 1021-1029.  http://dx.doi.org/10.4141/cjas91-123

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File title: Growth performance and carcass composition in beef heifers undergoing catch-up (compensatory) growth
File author: E. Yambayamba, M. A. Price
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