Wednesday, August 29, 2012

Ultrasound data

On August 22, rib eye area (REA), loin depth, and rib fat (BF) were determined via ultrasound. The goats were scanned by Jim Pritchard from West Virginia University. The data were processed by the National CUP Lab & Technology Center in Ames, Iowa.

Rib eye area ranged from 0.70 to 1.80 square inches and averaged 1.15 ± 0.26 in2. The median was 1.14 in2. The buck with the largest rib eye was #73, a 67-lb. 75% Kiko x 25% La Mancha buck consigned by Verlin Garber (TN).

Rib eye area is obviously strongly affected by size (weight), with the larger goats tending to have larger rib eyes. However, there are considerable differences among goats of similar sizes.

To better evaluate the bucks for rib eye area, the data was organized by weight groups. A ratio was calculated for each buck by comparing its rib eye measurement to the average for its weight group. For example, all goats weighing between 51 and 60 lbs. had have their rib eye measurements compared to the group average of 1.11 in2.

Using this system of evaluation, the Garber buck also had the highest ratio for REA at 143 percent. The buck with the second best ratio (135%) was #42, a 59-lb. Purebred Kiko consigned by Jill Zink (IN). Randy & Jodie Majanscik (KY) had a 49-lb. Kiko buck with a 131% ratio (#24).

Loin depth ranged from 0.50 to 0.81 and averaged 0.65 ± 0.07 inches. The median loin depth was 0.64 in. This is the first year that loin depth was determined.

Rib fat (BF) ranged from 0.03 to 0.09 and averaged 0.05 ± .02 inches. The median rib fat was 0.05 in. In past years, when goats from the pasture test (and pen study) have been slaughtered, there has been insufficient rib (or back) fat to measure. Body wall thickness is measured instead.

Download August 22 ultrasound report