| Abstract: | Physiological indicators of muscle catabolism would aid assessment of winter nutritional restriction of ungulates, and urinary 3-methylhistidine has exhibited potential in this regard in several species. We examined the effect of chronic moderate and severe nutritional restriction during winter on urinary 3-methylhistidine:creatinine ratios in seven adult white-tailed deer (Odocoileus virginianus) and the relationship of these ratios to urinary urea nitrogen:creatinine ratios. Mean base line estimates of urinary 3-methylhistidine:creatinine ratio for the control and severely restricted deer (0.043 and 0.086 ??mol:mg, respectively) were similar (P = 0.280) and remained unchanged in the control deer throughout the study. In contrast, mean 3-methylhistidine:creatinine ratios increased dramatically as nutritional restriction and cumulative mass loss progressed; the quadratic component of the data for the chronically restricted deer was significant (P < 0.001). Likewise, there was a strong curvilinear relationship (R2 = 0.82) between cumulative mass loss (up to 29%) of the pooled deer and urinary 3-methylhistidine:creatinine ratios. Further, urinary urea nitrogen:creatinine ratios were strongly related to 3-methylhistidine:creatinine ratios (r2 = 0.89). Our study indicates that further investigation of 3-methylhistidine as an indicator of physical condition and muscle protein breakdown is warranted. |
| Genre: | Article |
| ProdID: | 70020597 |
| Citation Author: | DelGiudice, G. D.; Kerr, K. D.; Mech, L. D.; Riggs, M. R.; Seal, U. S. |
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| Citation End Page: | 2095 |
| Citation Issue: | 11 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Journal of Zoology |
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| Citation Number Of Pages: | 6 |
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| Citation Search Results Text: | Urinary 3-methylhistidine and progressive winter undernutrition in white-tailed deer; 1998; Article; Journal; Canadian Journal of Zoology; DelGiudice, G. D.; Kerr, K. D.; Mech, L. D.; Riggs, M. R.; Seal, U. S. |
| Citation Start Page: | 2090 |
| Citation Volume: | 76 |
| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | Urinary 3-methylhistidine and progressive winter undernutrition in white-tailed deer; 1998; Article; Journal; Canadian Journal of Zoology; DelGiudice, G. D.; Kerr, K. D.; Mech, L. D.; Riggs, M. R.; Seal, U. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1998 00:00 -0600 |
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