Evaluation of electronic technology to assess lamb carcass composition

Area of Science:

• Animal Science
• Agricultural Technology
• Meat Science

Background:

• Accurate price signals are crucial for U.S. lamb producers to optimize lean meat production.
• Developing carcass merit-pricing systems necessitates objective technologies for evaluating carcass composition and lean distribution.

Purpose of the Study:

• To evaluate the accuracy of various electronic technologies for determining lamb carcass composition.
• To identify the most effective technologies for predicting lean meat yield and distribution in lamb carcasses.

Main Methods:

• Tested four electronic technologies: realtime ultrasound, optical reflectance probe, bioelectrical impedance analysis, and electromagnetic scanning (TOBEC).
• Evaluated technologies on 106 representative U.S. market lambs, testing on both warm and chilled carcasses.
• Compared technology-derived predictions against dissected carcass composition data.

Main Results:

• Electromagnetic scanning (TOBEC) and bioelectrical impedance analysis demonstrated strong predictive capabilities for carcass lean percentage and weight.
• TOBEC measurements explained more variability in dissected lean than carcass weight alone.
• Realtime ultrasound and optical reflectance probe showed marginal predictive power for carcass yield.

Conclusions:

• Electronic technologies, particularly TOBEC and bioelectrical impedance, offer accurate methods for assessing lamb carcass composition.
• These technologies can support the development of a U.S. sheep industry price discovery system based on carcass merit.
• Industry commitment is key to implementing these objective assessment tools for lamb pricing.