LIMOUSIN TODAY LimToday_HRI18_WEB | Page 97

Management index score was calculated by averaging the chute score, pen score and exit velocity score. Blood samples were analyzed for cortisol concentrations. Cortisol is a hormone released when mammals are stressed or excited. Increased cow temperament score and elevated plasma cortisol concentrations both were associated with decreased probability of pregnancy. These results suggest that excitable temperament and the consequent elevated cortisol concentrations are detrimental to reproductive function of cows. These authors concluded that management strategies that improve cow disposition, enhance their immune status, and maintain the cow herd at adequate levels of nutrition are required for optimal reproductive performance. Source: Cooke and co-workers. 2009 Florida Beef Research Report. In addition to the danger that wild, crazy cows create for cattle producers, the wear and tear on equipment and fences, reduced likelihood of reproductive success is another good reason to cull poor disposition from the herd. I LIMOUSIN Today | 95