1 / 17

Swine Evaluation

This evaluation tool developed by Celina Johnson of the University of Florida assesses swine based on last rib backfat, muscle score, and loin eye area. It also provides guidance on evaluating fat and muscle in specific areas of the hog.

ballance
Download Presentation

Swine Evaluation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Swine Evaluation Developed by: Celina Johnson University of Florida

  2. What’s Evaluated?? • Last Rib BackFat (LRBF) • Visual Evaluation • 10th Rib Backfat • Adjustment from LRBF • USDA Muscle Score (MS) • Grade = (4 * LRBF) - MS Johnson, 1997

  3. What’s Evaluated?? • Loin Eye Area (LEA) • Estimate using live weight • % Muscle • Calculation using: • Live weight • 10th rib backfat • LEA Johnson, 1997

  4. Evaluating for Fat • Where to evaluate? Jowl Forerib Shoulder Blade Elbow Pocket Loin Edge Flank Tailhead Seam of Ham Johnson, 1997

  5. Evaluating for Fat Johnson, 1997

  6. Evaluating for Muscle • Where to Evaluate? Shoulder Forearm Loin Stifle Ham Johnson, 1997

  7. Evaluating for Muscle Johnson, 1997

  8. Converting LRBF to 10th RBF • IF… < 1.0” THEN… • Leave the same • IF… 1.0 to 1.1” THEN… • add 0.1” • IF… > 1.1” THEN… • add 0.2 to 0.4” • IF… light muscled THEN… • add more • IF… heavy muscled THEN… • add less Johnson, 1997

  9. Estimating LEA using Live Weight • Average Muscled Hogs • 225# = 5.0 in2 • 250# = 5.5 in2 • 275# = 6.0 in2 • Adjust 0.1 in2 for every 5# live weight • Adjust as needed using visual evaluation Johnson, 1997

  10. % Muscle Calculation • Base Percent = 50.0 • Three Factors • Weight • 10th RBF • LEA Johnson, 1997

  11. % Muscle Calculation • Weight Base = 240 # • Adjust +/- 1% for every 5# • Above 240#…decreases % • Below 240#… increases % Johnson, 1997

  12. % Muscle Calculation • LEA Base = 5.0 in2 • Adjust +/- 0.2% for every 0.1 in2 • Above 5.0 in2… increases % • Below 5.0 in2… decreases % Johnson, 1997

  13. % Muscle Calculation • 10th RBF Base = 0.8 in. • Adjust +/- 1% for every 0.1 in. • Above 0.8 in… decreases % • Below 0.8 in… increases % Johnson, 1997

  14. % Muscle Problem: • Live Weight = 260 lbs. • 10th RBF = 0.9 in. • LEA = 5.9 in2 Johnson, 1997

  15. % Muscle Problem: • Live Weight = 260 lbs. Base = 240 Difference = 20 # Adjust down 4% 50.0 - 4 = 46.0% Johnson, 1997

  16. % Muscle Problem: • 10th RBF = 0.9 in. Base = 0.8 in. Difference = 0.1in. Adjust down 1% 46.0 - 1 = 45.0% Johnson, 1997

  17. % Muscle Problem: • LEA = 5.9 in2 Base = 5.0 in2 Difference = 0.9in2 Adjust up 1.8% 45.0 + 1.8 = 46.8% Johnson, 1997

More Related