Sheep Scanning School August 23 rd /24 th Hettinger, ND
Agenda • Tuesday AM – Meet and Greet – Educational Session • Why? • How? • When? • Tuesday PM – Practice Image Collection • Wednesday AM – Certification
Meet and Greet!!!
Why is this Important to the Sheep Industry?
Sheep Profit Breakdown • Lamb – 85% of gross income • Wool – 15% of gross income
Carcass Facts! • 50% dressing yield Rib-eye area is not • 50% BCTRC measured!!! • 95% lamb grade Choice • Lamb yield grade – YG = (10*BF) + 0.4
Cutability and USDA Yield Grade. BCTRC = boneless, closely YG % Cutability trimmed retail cuts 1.0 51.0 1.5 50.35 Live Carcass Contest Equation: 2.0 49.7 BCTRC = (49.936-(0.0848*HCWT)- 2.5 49.05 (4.376*BF)-(3.53*BW)+(2.456*REA)) 3.0 48.4 Savell and Smith, 2000 3.5 47.75 4.0 47.1 4.5 46.45 5.0 45.8 5.9 45.15
Carcass Value • Carcass – $268 • Racks and Loins – $111 (42%) • Legs – $94 (35%) • Shoulders – $50 (19%) Clearly, improving size of loin eye area has the most potential to improve lamb carcass value!
Scanning Facts! • Best Quantitative Measure of Carcass Merit. • Leeds et al. (JAS, 2008) – 1 SD of LM area equals • ~1% increase in dressing percent • $3.15 gross carcass value • $3.86 boxed carcass value
Opportunity for Improvement Table 2: Leeds et al. Table 1: Emenheiser et al. 2.5 in 2 = 16.1 cm 2 3.0 in 2 = 19.4 cm 2
Heritability of Several Traits Traits Percentage Number born 10% 60 day 10% 120 day wt 20% 240 day wt 40% Fat Thickness 30% Rib-eye area 35% Carcass wt 40% Wt of trimmed cuts 45%
Summary • Lamb is the #1 product for sheep production • Rib-eye area is the #1 predictor carcass value • What it Means to Producers? – No direct payments to lambs with larger rib-eyes – Slight increases in dressing percent – Improving the rib-eye area of lamb will improve consumer acceptance of American lamb – Most value in terminal sire flocks and direct marketing
The End
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