Abstract
1. 1. Fecal excretion of calcium was examined in 122 individual ungulates representing 7 species of Equidae, 3 species of Tapiridae, 3 species of Rhinocerotidae, 2 species of Elephantidae, 2 species of Hippopotamidae, 12 species of Bovidae, 2 species of Cervidae, 3 species of Camellidae and 1 species of Giraffidae. 2. 2. Animals were fed timothy hay, a low calcium diet or alfalfa hay, a high calcium diet. 3. 3. In a few cases oat straw or prairie hay was used instead of timothy hay. 4. 4. Samples of feces were obtained from individuals daily for 4 days following a 20 day dietary equilibration period. 5. 5. Feces of equids, tapirs, rhinoceros and elephants had a lower calcium concentration and a lower Ca/P ratio than feces of ruminants when the animals were fed diets of equivalent calcium content. 6. 6. The findings suggest that the non-ruminant ungulate equids, tapirs, rhinoceros and elephants absorb a larger proportion of dietary calcium than ruminants do.
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