dan morrical iowa state university extension sheep specialist carcass component growth dgm:isu
TRANSCRIPT
![Page 1: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/1.jpg)
Dan MorricalIowa State University
Extension Sheep Specialist
Carcass Component Growth
DGM:ISU
![Page 2: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/2.jpg)
Lean tissueAdipose tissue Skeletal tissue
Components
DGM:ISU
![Page 3: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/3.jpg)
AgeWeight
FatColor
FirmnessMuscle
Carcass value
DGM:ISU
![Page 4: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/4.jpg)
Moderately leanHeavy muscled
Carcass value
DGM:ISU
![Page 5: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/5.jpg)
Projected Target Market Weights
Fat Thickness (12-13th rib)
.15 .25 .35
Frame Size WETHERS
Small 92 116 140
Medium 97 126 154
Large 109 140 170 Tatum, 1992
![Page 6: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/6.jpg)
Frame Size, Growth and Carcass Traits
DGM:ISU
Texas Rambouillet WethersSmall Medium Large
Carcass wt. 54 51 50
Backfat .18 .11 .07
Ribeye 2.02 2.05 1.98
![Page 7: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/7.jpg)
![Page 8: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/8.jpg)
Carcass Parameters, Constant weight 105 pounds
Small Medium Large
DOF 55 30 19
Slaughter weight 105 105 105
DP 51.6c 48.7d 47.9d
FT in 0.18 0.11 0.07
REA 2.2 2.05 1.98
% Choice 98.9 98.7 95.9
Nicholes
![Page 9: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/9.jpg)
Carcass tissue weights of mature rams of two strains of Merinos of different mature size (Data from Butterfield et al., 1983a)
Weight (kg)
Whole Carcass Tissue Large n=3 Small n=3Sig. of
Diff.
Muscle 25.9 20.7 ***
Bone 6.4 4.9 **
Fat 26.7 18.8 **
Liveweight 116.5 90.9 ***
![Page 10: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/10.jpg)
![Page 11: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/11.jpg)
kgLiveweight 4 10 20 30 40 50 60 70 80 90 100=100
Carcass muscle 5 12 24 35 46 56 66 75 84 92 100=22.5Carcass bone 8 18 27 39 50 60 70 79 87 94 100=5.5Carcass fat 1 2 5 10 18 27 38 50 65 82 100=21.8
Percentage Maturity
The progress of carcass tissues of a Merino ram to maturity at 100 kg LW relative to the progress to maturity of shorn full LW
![Page 12: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/12.jpg)
![Page 13: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/13.jpg)
![Page 14: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/14.jpg)
Carcass tissues as % of shorn full LW of mature rams of two strains of Merinoes of different mature size (Data from Butterfield et al., 1983
Percent of LW
Whole Carcass Tissue Large n=3 Small n=3Sig. of
Diff.
Muscle 22.3 22.8 NS
Bone 5.5 5.4 NS
Fat 23.0 20.7 *
LW 100.0 100.0
![Page 15: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/15.jpg)
![Page 16: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/16.jpg)
Fat partitions by sex
Fat partition % of total body fat Ewes as % of rams
Rams N=18 Ewes N=16
Subcutaneous* 30 33 1.1
Intermuscular*** 30 26 0.87
Total carcase 60 59 0.98
Kidney** 12 15 1.25
Omental 18 17 0.94
Mesenteric 7 7 1
Scrotal/Udder*** 3 2 0.67
Total non-carcase 40 41 1.02
Total Body 100 100
(Adapted from Thompson 1983)
![Page 17: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/17.jpg)
Rams Ewes Ewes = 1
Rams =
27.1 23.9 1.13
4.8 4.1 1.16
13.5 18.1 0.75(Data from Fourie et all, 1970)
Muscle
Bone
Fat
% of LW Ratio
The carcass tissues as % of mature full LW of a combined group of Romney, Southdown and Romney Southdown crosses
Whole carcass tissue
![Page 18: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/18.jpg)
Which group is better
![Page 19: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/19.jpg)
DorsetDown
Hamp.Down
Ile deFrance
Southdown Suffolk Texel s.e. Mean
Age at slaughter (days) 218 236 253 234 249 247 6
Carcass wt (kg) 17 17.7 18.4 16.4 19.1 18.8 0.1
Daily carcass wt gain (g) 86 86 78 80 84 83 2
M. longissimus
Width A-mm 55.1 56.2 57 55.3 58 57.7 0.52
Depth B-mm 26.0a 25.5a 27.5b 25.8a 26.4a 27.4b 0.35
![Page 20: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/20.jpg)
DorsetDown
Hamp.Down
Ile deFrance
Southdown Suffolk Texel s.e. Mean
Carcass conformation
(15 pt scale) 7.6bc 7.5bc 8.2c 8.3c 7.8c 7.9c 0.23
Tissue in carcass (g/kg)
lean 557a 562ab 571b 559ab 567ab 590c 3.2
separable fat 267cd 263bcd 255bc 273d 252b 240a 3.3
Daily tissue wt gain in carcass (g)
lean 47 45 43 43 46 47 1
separable fat 22 22 20 22 21 20 0.57
![Page 21: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/21.jpg)
Ile DeFrance
![Page 22: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/22.jpg)
Suff Coop DLS Rom Fin
Slaughter wt 95.5 92.4 95.5 93.3 93
Age (d.) 204 222 239 222 264
BF 0.15 0.18 0.16 0.12 0.20
REA 1.83 1.65 2.17 1.67 1.80
Fahmy etal 1992 J. Anim Sci 70:1365
Sire Breed Impact on Growth and Carcass
![Page 23: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/23.jpg)
Carcass Traits by Sire Breed
Hamp Polypay
Gain 0.72 0.65
FE 6.60 6.70
Backfat 0.30 0.30
Bodywall 0.96 1.00
REA 2.43 2.29
YG 2.50 2.50
No impact on individual cuts
Meyer et al, 1993, SRJ 9:97
![Page 24: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/24.jpg)
Effect of Sire Breed on carcass traits, adjusted for carcass weight
Dor Tex Mon Fin Rom
Slaughter wt 114 113 113 114 117
BF .25a .29b .24a .31b .29b
REA 2.35a 2.54b 2.41a 2.12c 2.24a
Freking and Leymaster. 2004. J. AnSci 82:3144
![Page 25: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/25.jpg)
Evaluation of Texel, Columbia and Suffolk as Terminal Sires along with Finishing System
T S C BG FL
DP 51.1 52.0 51.0 51.0 51.7
BF 0.23 0.20 0.20 0.20 0.25
Bodywall .99a 1.07b 1.14c 1.00 1.12
REA 2.6 2.4 2.4 2.6 2.4
Morrical IASBR, 1994.
![Page 26: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/26.jpg)
Restricted feeding on Growth and Carcass
Intake Level
100% 85% 70%
ADG 0.90 0.76 0.65
FE 3.3 3.4 3.4
% Water 49.6 51.2 51.5
% Protein 15.1 15.6 15.4
% Fat 31.1 29.0 28.2Murphy et al 1994 J. AnSci 72:3131
![Page 27: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/27.jpg)
Impact of protein content and source on performance and carcass.(prolific crosses)
FM SBM CGM& BM Control
16% 16% 16% 13%
ADG .49a .41b .48a .40b
FE 4.99a 5.48b 5.11ab 5.76b
BF 0.15 0.17 0.16 0.18
REA 1.95 1.91 1.84 1.84
90 lb slaughter weightFahmy et all 1992 J. AniSci
![Page 28: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/28.jpg)
Impact of Protein Source and Level on Suffolk Wether Growth and Performance
CP SBM SBM&F
13 16
ADG 0.98 1.00 0.98 0.97
FI 4.5 4.5 4.6 4.4
FE 4.6 4.6 4.7 4.6
BF 0.18 0.17 0.17 0.16
%lean 53.0 54.7 54.0 53.6
Ribeye Area 2.63 2.72 2.66 2.68
Neary et al, 1995
![Page 29: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/29.jpg)
Frame Size and Feeding Method
Small Medium Large
Wheat Pasture gain 0.14 0.15 0.14
Feed lot gain 0.60 0.72 0.73
FE 7.2 6.6 5.6
![Page 30: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/30.jpg)
Finishing System Impacts on CarcassC FC
Carcass Wt 63.1 57BF 0.35 0.3Bodywall 1.1 0.9
Age vs System. No effects on cuts.
![Page 31: Dan Morrical Iowa State University Extension Sheep Specialist Carcass Component Growth DGM:ISU](https://reader030.vdocuments.us/reader030/viewer/2022032415/56649f065503460f94c1b497/html5/thumbnails/31.jpg)
Summary
Sex has an impact
Protein level
Older/backgrounding improves
cutability