Calcium excretion in feces of ungulates.

This research investigates the excretion of calcium in feces of various species of ungulates, or hooved animals. The study indicates that certain non-ruminant ungulates may absorb a higher proportion of dietary calcium than their ruminant counterparts.

Subject and Methodology

• The research involved studying 122 individual ungulates from different species including Equidae, Tapiridae, Rhinocerotidae, Elephantidae, Hippopotamidae, Bovidae, Cervidae, Camellidae, and Giraffidae.
• These animals underwent a dietary adjustment for 20 days, during which they were fed timothy hay, a low calcium diet. In some instances, they were given alfalfa hay which, in contrast, contains high amounts of calcium. In a few cases, oat straw or prairie hay replaced timothy hay.
• After the equilibration period, feces were sampled daily over a period of four days.

Finding and Conclusion

• The results revealed that the feces of equids, tapirs, rhinoceros, and elephants had a lower calcium concentration and a lower calcium/phosphorus (Ca/P) ratio than the feces of ruminant ungulates.
• This discrepancy in calcium content found in feces was observed even when both ruminant and non-ruminant animals were subjected to diets with equal calcium content.
• Such findings suggest that non-ruminant ungulates such as equids, tapirs, rhinoceros, and elephants may absorb a larger proportion of dietary calcium.

This research further illuminates our understanding of how different ungulate species process calcium in their diets. This can have implications for animal health and welfare as a vital nutrient like calcium is integral for numerous body functions, including bone strength. It could also influence dietary recommendations for these species in various settings such as zoo or conservation programs. However, further research is needed to elucidate the factors determining these different absorption rates and to confirm these initial findings on larger sample sets.