Fabrication yields and allometric growth coefficients of carcass components of serially slaughtered implanted or non-implanted beef steers

IF 1.4 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE Applied Animal Science Pub Date : 2024-09-16 DOI:10.15232/aas.2024-02580
Kaitlyn R. Wesley , Sierra L. Pillmore , Tylo J. Kirkpatrick , Kimberly B. Cooper , Forest L. Francis , Travis C. Tennant , Wade T. Nichols , Lee-Anne J. Walter , John P. Hutcheson , Ty E. Lawrence
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Abstract

Objective

Our objective was to quantify differences in carcass fabrication yield and allometric coefficients of carcass components from implanted and non-implanted steers.

Materials and Methods

Steers (n = 80; initial BW 271 ± 45 kg) were paired and randomized to slaughter date (d 0, 42, 84, 126, 168, 210, 252, 294, 336, 378). Individuals were randomized to treatment of negative control (CON) or Revalor-XS on d 0 and 190 (REV). One side of each animal was fabricated after a 48-h chill into primals, denuded subprimals, lean trim, trimmed fat, and bone. Weights (g) of non-carcass and carcass components were log-transformed and consolidated to arithmetic means by treatment and slaughter date. Growth coefficients were calculated using the allometric equation.

Results and Discussion

Cattle administered REV had increased cold side weights (CSW) 7.7%, bone yield 4.9%, and red meat yield 8.5%, with no differences in fat yield. Forequarter primal weights (chuck, brisket, foreshank, rib) increased 8.4%, 6.9%, 7.2%, and 5.2%, respectively, for REV cattle. Hindquarter primals (loin, flank, round) increased by 7.0%, 8.6%, and 6.3%, respectively, for REV steers. Length of feeding period notably did not affect chuck or loin yields proportionate to CSW. Fat as percentage of CSW increased at 0.04% per day, whereas bone and red meat yield decreased at −0.013% and −0.024% per day, respectively. Allometric growth coefficients were greater for REV in 2 carcass components (chuck eye roll, eye of round), whereas CON was greater in 1 component (flank steak). All primals except the round (0.81) and foreshank (0.87) exhibited growth coefficients greater than the empty body.

Implication and Applications

These data indicate that REV steers are more likely to have heavier side weights, greater bone yield, and increased red meat yields than CON steers. Additionally, minimal differences were observed in allometric growth coefficients between CON and REV steers. Steers administered REV greatly improved carcass yield over CON during a 378-d finishing period.

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连续屠宰植入或未植入基因的肉牛胴体成分的制造产量和异速生长系数
我们的目标是量化植入和未植入药物的母牛胴体制造产量和胴体成分的异速系数的差异。在第 0 天和第 190 天(REV),动物随机接受阴性对照(CON)或 Revalor-XS 处理。每只动物的一侧在冷冻 48 小时后被制成主肉、去毛副主肉、瘦肉、去脂肉和骨头。非胴体和胴体成分的重量(克)按处理和屠宰日期进行对数变换并合并为算术平均数。结果与讨论饲喂 REV 的牛冷侧体重(CSW)增加了 7.7%,骨骼产量增加了 4.9%,红肉产量增加了 8.5%,脂肪产量没有差异。REV 牛的前四分之一主肉重量(卡盘、牛腩、前腿、肋骨)分别增加了 8.4%、6.9%、7.2% 和 5.2%。REV 牛的后季初生牛(腰肉、侧腹肉、圆肉)分别增加了 7.0%、8.6% 和 6.3%。饲养期的长短明显不影响夹头或腰肉产量与全长重量的比例。脂肪占CSW的百分比每天增加0.04%,而骨肉和红肉产量每天分别减少-0.013%和-0.024%。REV的异速生长系数在2个胴体成分(鸡眼卷、圆眼)中较大,而CON的异速生长系数在1个胴体成分(侧腹牛排)中较大。除圆肉(0.81)和前腿肉(0.87)外,所有主肉的生长系数均大于空心肉。 这些数据表明,与 CON 型阉牛相比,REV 型阉牛更有可能获得较重的侧重、较高的骨产量和较高的红肉产量。此外,在异速生长系数方面,CON 和 REV 牛之间的差异极小。在 378 天的育成期中,施用 REV 的母牛比施用 CON 的母牛胴体产量大大提高。
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来源期刊
Applied Animal Science
Applied Animal Science AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
3.00
自引率
6.70%
发文量
68
期刊最新文献
Table of Contents Editorial Board Call for Submissions Fabrication yields and allometric growth coefficients of carcass components of serially slaughtered implanted or non-implanted beef steers Comparison of a single extended-release implant and a re-implant strategy on performance and carcass characteristics of beef finishing heifers
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