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Effects of a Low Manganese Diet on Certain Ovine Characteristics

University of Georgia, Athens

Abstract

Four sets of twin ewe lambs were employed in an experiment so that one member of each twin was fed a control purified diet and the other an equal amount of the diet without manganese. By the 12th week of the experiment lambs on the low manganese diet showed clinical symptoms of joint pains, reluctance to move and a tendency to "rabbit hop" when forced. After 22 wk. lambs receiving the low manganese diet exhibited reduced wool manganese levels while control lambs showed increased manganese levels. Control lambs had tibias that were longer, stronger and contained higher ash, calcium and manganese levels. Control lambs also had higher serum alkaline phosphatase values. The heart and liver but not kidney or skeletal muscle of control lambs also had higher manganese levels.

¹ Journal Series Paper No. 125 of the University of Georgia College of Agriculture Experiment Stations. College Station, Athens.

² Department of Animal Science.

³ Department of Medicine and Surgery, School of Veterinary Medicine.

⁴ The authors are grateful to Commercial Solvents Corp., Terre Haute, Indiana, The Monsanto Chemical Company, St. Louis, Mo., and Chas. Pfizer and Company, Inc., New York,for supplying some of the ingredients. Acknowledgment is also due Dr. E. P. Warren and Dr. R. A,Long for supplying the lambs and facilities, Dr. D. E. Tyler and Dr. E. Papp for the post-mortem examinations,Dr. W. E. Ratterree for breaking strength measurements, Dr. J. D. Edens for veterinary assistance,Dr.R. B. Barrett for the radiographs, J. V. Mason for the analyses, and F. M. Williams for assistance with the lambs.

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