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Permanent link (DOI): https://doi.org/10.7939/R3CZ19

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Fiber-type proportions and diameters in the longissimus muscle of beef heifers undergoing catch-up (compensatory) growth Open Access

Descriptions

Author or creator
Yambayamba, E.
Price, M. A.
Additional contributors
Subject/Keyword
compensatory growth
realimentation
heifers
muscle fibers
fiber type
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 the effects of mild, chronic feed restriction followed by refeeding on some longissimus muscle fiber characteristics. Five animals were slaughtered on day 1 for analysis of initial muscle fiber characteristics. The remaining 48 animals were randomly penned in groups of 6 and assigned to treatments as follows: three pens to ad libitum feeding; three pens to 2 mo of feed restriction followed by refeeding, and two pens to 4 mo of feed restriction followed by refeeding. Animals in one ad libitum and one restricted pen were slaughtered after 2 mo and those in one pen from each treatment after 4 mo, and the remainder at the final slaughter weight of about 410 kg. Two months of feed restriction had no effect on the proportions of longissimus muscle fiber-types, \"red\" (βR), \"white\" (αW), and \"intermediate\" (αR), but fiber diameters were smaller (P < 0.05) in the restricted than in the ad-libitum-fed animals. Four months of feed restriction was associated with a relatively higher (P < 0.05) proportion of βR fibers and lower (P < 0.05) proportion of αW fibers than ad libitum feeding. Muscle fiber diameters were larger (P < 0.05) in the ad-libitum-fed than in the restricted heifers. No significant feeding treatment differences were found in fiber-type proportions or fiber diameters at the final slaughter weight.
Date created
1991
DOI
doi:10.7939/R3CZ19
License information
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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). Fiber-type proportions and diameters in the longissimus muscle of beef heifers undergoing catch-up (compensatory) growth. Canadian Journal of Animal Science, 71, 1031-1035.  http://dx.doi.org/10.4141/cjas91-124

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File title: Fiber-type proportions and diameters in the longissimus muscle of beef heifers undergoing catch-up (compensatory) growth
File author: E. Yambayamba, M. A. Price
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