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Central Limits to Sustainable Metabolic Rate Have No Role in Cold Acclimation of the Short-tailed Field Vole (Microtus agrestis)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mcdevitt, Regina M. Speakman, John R. |
| Copyright Year | 1994 |
| Abstract | We investigated the extent to which the changes in basal metabolic rate (BMR), gut morphology, and food intake (FI) that typically occur during cold acclimation in small mammals can be explained by the concept of alimentary-mediated limits to sustainable metabolic energy expenditure. Adult short-tailed field voles (Microtus agrestis) were cold stressed by continuous exposure to 5° C. Exposure for 10, 20, 50, and 100 d (n = 6 in all cases) produced significant changes in oxygen consumption ($\dot{V}O_{2}$), mass, FI, and the dry weight of a variety of morphological parameters when compared with voles that were not cold exposed (n = 8). At 10°, 20°, and 25° C, $\dot{V}O_{2}$ (mL · min⁻¹) increased significantly with the duration of cold exposure. After 100 d cold exposure, $\dot{V}O_{2}$ had increased by more than 50% at each test temperature. Food intake (g · d⁻¹) increased significantly by 106% after 10 d cold exposure but did not increase further with increased exposure time. The ratio of FI (J · h⁻¹) to. |
| Starting Page | 1117 |
| Ending Page | 1139 |
| Page Count | 23 |
| File Format | PDF HTM / HTML |
| DOI | 10.1086/physzool.67.5.30163885 |
| Volume Number | 67 |
| Alternate Webpage(s) | http://www.abdn.ac.uk/energetics-research/publications/pdf_docs/75.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
