New Articles Posted to Sheep and Goat Research Journal
February 10, 2017

Three new articles have been posted to the 2016 digital issue of the Sheep and Goat Research Journal. The full articles are available at www.sheepusa.org/ResearchEducation_ResearchJournal.

Authors C.L. Thomas, W.R. Lamberson, R.L. Weaber, L.S. Wilbers, T. Wuliji, J.D. Caldwell and B.C. Shanks published Genetic Parameters for Internal Parasite Resistance, Reproduction, and Growth Traits in a Closed Line of Kiko × Boer Goats Divergently Selected for Internal Parasite Resistance. Since the prevalence of gastrointestinal nematodes is a major challenge for goat producers, one approach to combating internal parasites is to utilize the host animal's natural or acquired resistance to parasites in a selection program. The objective of the study was to estimate genetic parameters for parasite resistance, reproduction and growth traits in a closed line of Kiko × Boer goats divergently selected for internal parasite resistance. The results indicate that parasite resistance may be lowly heritable, regardless of parasite indicator trait measured, suggesting that selection progress would be possible, yet slow.

The Use of Organic Pinot Noir Grape Extract as a Natural Anthelmintic in Katahdin Lambs was written by K.A. Cash, B.C. Shanks, J.D. Caldwell, H.D. Naumann, A.L. Bax, L.S. Wilbers, T.N. Drane, K.L. Basinger, J.K. Clark, and H.L. Bartimus. Gastrointestinal nematode parasitism is one of the greatest threats to economic sheep production in the United States. With increased incidences of anthelmintic resistance and constraints of organic production, there is heightened interest in alternative natural dewormers, such as plants containing condensed tannins. The objective of this study was to evaluate effects of organic fermented Pinot Noir grape extract on parasite level and performance in Katahdin lambs. The study found that fermented grape extract may be an effective organic and sustainable strategy for controlling gastrointestinal nematodes and increasing performance in Katahdin lambs.

Authors of the third article, W.J. Thompson, R.J. Hogan and D.F. Waldron, wrote Factors Affecting Meat Goat Prices in San Angelo, Texas. The objective of the study was to estimate factors affecting auction prices of kid goats at San Angelo, Texas, from 2010 to 2015. Transaction records of 395,009 goat kids sold in 38,862 lots were analyzed with a hedonic-price model that included fixed effects for year and month of sale, weight class and the size of the lot and random effects for week of sale, nested within year, and residual. From 2010 to 2015 the Texas-goat population decreased, sales volume decreased and prices increased. Prices were highest in the first three months of the year, with July, August and September offering the lowest prices of the year. The results show that significant differences in prices can be captured by producers who market kids early in the year.