J. Anim Sci.
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J. Anim Sci. 1973. 37:450-454.
© 1973 American Society of Animal Science
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Comparative Calcium Excretion by Rats and Rabbits1

P. R. Cheeke2 and J. W. Amberg2

Oregon State University, Corvallis 97331

Abstract

Rats fed high calcium diets (10% calcium carbonate) excreted only small quantities of calcium in the urine (about 2% of the ingested calcium) while rabbits receiving the same diets excreted large quantities of calcium (about 60% of that ingested) in the urine. The pattern of magnesium excretion by the rabbits was very similar to their excretion of calcium; the urine was the major route of excretion; while in the rats most of the magnesium was excreted in the feces. Neither species appeard to utilize the calcium from calcium oxalate. In contrast to the situation in many species, urinary excretion seems to be a major calcium homeostatic mechanism in the rabbit.

Footnotes

1 Oregon Agricultural Experiment Station Technical Paper No. 3323.

2 Department of Animal Science.






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Copyright © 1973 by the American Society of Animal Science.