J. Anim Sci.
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J. Anim Sci. 1981. 52:413-417.
© 1981 American Society of Animal Science
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Effect of Dietary on Tissue Iodine Content in the Bovine1,2,

J. V. Downer3, R. W. Hemken, J. D. Fox and L. S. Bull4

University of Kentucky,5, Lexington 40546

Abstract

Twelve yearling Holstein steers were blocked by weight and assigned to receive one of three dietary I levels (0, 50 or 400 mg ethylenediamine dihydriodide [EDDI]/head/day) for 4 weeks. Average daily gain, body temperature and respiration rate were measured before and during the I feeding period, and no significant differences among treatment groups were found. Serum total I showed a significant increase with each increment of I. When animals were slaughtered, five muscle samples and liver and thyroid samples were dissected for I analysis. Mean total muscle I levels for the 0—, 50— and 400-mg treatment groups were .092, .127 and .406 µg/g wet tissue, respectively, each being different (P<.05) from the other two. I concentrations did not differ statistically between individual muscles within the 0– and 50-mg treatment groups, but in the 400-mg EDDI group, the trapezius (.469 µg/g) and biceps brachii (.569 µg/g) muscles had higher (P<.05) I concentrations than the semimembranous (.316 µg/g). psoas major (.365 µg/g) and longissimus (.307 µg/g). Dietary I increased (P<.05) liver and thyroid I concentrations in the 400-mg treatment group over those observed for the 0– and 50-mg treatment groups.

Footnotes

1 This manuscript (80-5046) is published with the approval of the Director of the Kentucky Agr. Exp. Sta.

2 Data in this paper are taken from the thesis of the senior author, submitted to the Graduate School of the Univ. of Kentucky in partial fulfillment of the requirements for the M. S. Degree.

3 Present address: Univ. of Pennsylvania, New Bolton Center, Kennett Square 19348.

4 Present address: Dept. of Anim. and Vet. Sci., Univ. of Maine, Orono 04469.

5 Dept of Anim. Sci.






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Copyright © 1981 by the American Society of Animal Science.