J. Anim Sci.
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J. Anim Sci. 1979. 48:525-530.
© 1979 American Society of Animal Science
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Perirectal Adipose Tissue Development of Postweaned Rapidlty Growing Bull Calves1

G. J. Garbutt2, W. B. Anthony2, D. F. Walker3 and J. A. McGuire4

Auburn University, Auburn, AL 36830

Abstract

Nine crossbred Simmental beef bull calves (average age of 222 days) were fed a high concentrate ration for 131 days and adipose tissue biopsied four times from the perirectal area on days 1, 37, 72 and 131. Samples from each bull calf were taken to characterize and analyze perirectal adipose tissue for dry matter, ether-extractable lipid, crude protein, Lowry soluble cytoplasmic protein, glucose-6-phosphate dehydrogenase activity, adipose cell number per gram (CNG) and mean adipose cell size (MCS). Lowry soluble protein (P<.01) and CNG (P<.05) decreased significantly on days 37 and 131, compared to day 1. Crude Protein (KN) declined significantly between day 1 and day 72 (P<.01). Glucose-6-phosphate dehydrogenase activity (either per gram of tissue, per gram of soluble protein or per cell number) and mean cell size (P<.01) increased on day 37 and then decreased significantly by the last biopsy time. Cell hyperplasia and/or cell hypertrophy were continuing in the perirectal adipose tissue during the 131 day test period.

Footnotes

1 Appreciation is also expressed for the assistance of J. P. Cunningham and K. E. Trawick in this study.

2 Department of Animal and Dairy Sciences, Auburn University Agricultural Experiment Station.

3 Department of Veterinary Medicine, Veterinary School, Auburn University.

4 Department of Research Data Analysis, Auburn University Agricultural Experiment Station






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Copyright © 1979 by the American Society of Animal Science.