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Permanent link (DOI): https://doi.org/10.7939/R3MV5Z

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Patterns of muscle, bone and fat accretion in three biological types of feedlot bulls on three dietary energy levels Open Access

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Author or creator
Patterson, D. L.
Berg, R. T.
Price, M. A.
Additional contributors
Subject/Keyword
tissue growth
biological types
feedlot bulls
diet
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
The data used in this study consisted of 119 075 complete lactation records accumulated by record of performance (ROP) from 1976 to 1981. Each individual record consisted of 7, 8 or 9 monthly test day milk weights and corresponding fat percentage. The data for each breed (Ayrshire, Guernsey, Holstein, Jersey) were grouped into two ages at freshening — less than 36 mo and greater than or equal to 36 mo. Months of calving were grouped into four seasons: March to May, June to August, September to November, and December to February. For both milk and fat yield, separate sets of extension factors to predict 305-day yield were estimated for each breed, group, and season of calving, using three methods (multiplicative, regression, nonlinear model). A new set of data collected by ROP during 1982 was used to compare three sets of extension factors. The nonlinear model method was better than either the multiplicative or regression methods because of smaller bias and better precision, and because it can be easily implemented in Canadian milk recording programs. Separate extension factors are not required for different geographic zones allocated by ROP.
Date created
1985
DOI
doi:10.7939/R3MV5Z
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@1985 Patterson, D. L., Berg, R. T., 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
Patterson, D.L., Berg, R.T. and Price, M.A. (1985). Patterns of muscle, bone and fat accretion in three biological types of feedlot bulls on three dietary energy levels. Canadian Journal of Animal Science, 65(2), 351-361. doi: 10.4141/cjas85-040
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File title: PATTERNS OF MUSCLE, BONE, AND FAT ACCRETION IN THREE BIOLOGICAL TYPES OF FEEDLOT BULLS FED THREE DIETARY ENERGY LEVELS
File author: D. L. PATTERSON, M. A. PRICE, R. T. BERG
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