USING ULTRASOUND ESTIMATES OF LOIN MUSCLE MEASUREMENTS TO OBTAIN WEIGHT-ADJUSTED RIBEYE AREA IN TARGHEE RAMS
Applied Research
Janna Kincheloe
Area Extension Specialist, Livestock Systems
North Dakota State University
Hettinger
Abstract
\r\n In recent years, ultrasound measurement of ribeye area (REA) has allowed objective measurements of important carcass traits to be used in livestock selection programs.However, there are no standardized procedures to accurately ensure repeatability among technicians, and, due to differences in production and management, no established weight and/or age at which to measure REA. The objective of this research is to develop a recommended method to adjust ram ultrasound scanning estimates. Forty-two MSU Targhee rams were measured for REA at 12th/13th rib transverse using ultrasound approximately every 4 weeks from November through May under a typical ram development program for western range rams. Data indicated that a 190-lb ram should have a 3-inch REA, and that REA changed by ±0.015 inches for every 10-lb change above or below 190 lb. Body weight differences accounted for 67% of variation in REA. Our ultrasound procedures will be used to develop a standardized protocol for ultrasound scanning of sheep and will assist in development of a carcass merit EPD in the Targhee breed.
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Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
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Authors: J.J. Kincheloe, L.M.M. Surber, R. Kott
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Kincheloe, J. Judith Basin County Extension Agent, Montana State University, Montana, 59479
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Surber, L. Research Associate, Montana State University, Montana, 59717
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Kott, R. Extension Sheep Specialist, Montana State University, Montana, 59717