• Diet Selection of Hereford, Angus X Hereford and Charolais X Hereford Cows and Calves

      Walker, J. W.; Hansen, R. M.; Rittenhouse, L. R. (Society for Range Management, 1981-05-01)
      Botanical composition of cattle diets of Hereford, Angus x Hereford and Charolais x Hereford cows and calves were compared to determine the effect of cattle age and/or breed on species selection. Multivariate analysis of variance showed small but significant differences between cow and calf diets and no differences among breeds. Similarity indices and Spearman's rank correlation coefficient showed a high degree of overlap and significant correlation between ages and among breeds. Differences between cow and calves among breeds were minor and of little value in range management.
    • Diets of Domestic Sheep and Other Large Herbivores in Southcentral Colorado

      MacCracken, J. G.; Hansen, R. M. (Society for Range Management, 1981-05-01)
      The botanical composition of herbage consumed by domestic sheep, mule deer, domestic cattle and elk from critical big game winter ranges in southcentral Colorado was studied using the fecal analysis technique. The food habits of domestic sheep grazed during the late spring overlapped those of mule deer by 15%, elk 46%, and domestic cattle by 53%. Mule deer diets were 10% similar to cattle and 30% to elk. Elk and cattle diets averaged 39% identical on the study area. The low similarity in diet between domestic stock and mule elk suggests that livestock grazing in the study area could be made compatible with the winter range needs of mule deer, but the potential competition between elk and domestic stock needs additional study.