| Autor: |
John R. Speakman, R. M. McDevitt |
| Rok vydání: |
1994 |
| Předmět: |
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| Zdroj: |
Physiological Zoology. 67:1103-1116 |
| ISSN: |
0031-935X |
| DOI: |
10.1086/physzool.67.5.30163884 |
| Popis: |
We exposed short-tailed field voles, Microtus agrestis, to transient decreases in ambient temperature to evaluate the limits of their sustainable metabolic rates. We predicted that voles exposed to transient low temperatures would elevate their food intake until they reached some alimentary limit and thereafter they would withdraw reserves. During short-term (24-h) exposure to temperatures below the lower critical temperature (25° C) daily food intake actually decreased significantly to a minimum of 1.51 ± 0.41 g at 10° C but was greater at 5° and -5° C. Weight loss (g) increased significantly with decreasing temperature; however, at 5° C vole mass increased. During more prolonged exposure for 4 d, food intake increased significantly with the duration of cold exposure (5° and 15° C) to a maximum on days 3 and 4. In a separate experiment voles were randomly exposed for 3-d intervals to a range of temperatures from 20° to 5° C and were returned to 25° C for 3 d between exposures. Both food intake and weight... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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