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Timely Topic
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Longevity Attributes of Bos indicus x Bos taurus Crossbred Cows
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F.A. Thrift and T.A. Thrift, Universities of Kentucky and Florida, respectively, recently published an excellent research review of the attributes of Bos indicus (Brahman) x Bos Taurus (European) crossbred cows. Brahman x European crosses are used widely in the southeastern and Gulf Coast regions of the U.S. Compared to B. taurus females, Brahman x B. taurus females express a higher level of preweaning productivity during a longer lifespan. The longevity observed in Brahman cross cows can be partially explained by their greater tolerance to hot, humid environments. In addition, Brahman cross cows are less subject to death or being culled for the following maladies: calving difficulty, external parasites (flies, ticks and mosquitoes), internal parasites, eye disorders (pink eye and cancer eye), teeth deterioration, and grass tetany. Research has clearly shown that longevity/stayability is related to greater economic efficiency in the cow herd. In contrast, longevity can tend to be shortened in some B. indicus x B. taurus genetic types due to udder/teat abnormalities and vaginal/uterine prolapses (Thrift and Thrift. 2003. Prof. Anim. Sci. 19(5): 329). [February 10th, 2004]
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Dr. Rick Rasby, Professor of Animal Science
Animal Science, University of Nebraska - Lincoln, Lincoln, NE
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