Literaturdatenbank
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Crawford, K. M. (1991). The effect of temperature and seasonal acclimatization on renal function of painted turtles, chrysemys picta. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 99, 375–380.
Added by: Admin (23 Aug 2008 19:57:56 UTC) |
| Resource type: Journal Article BibTeX citation key: Crawford1991 View all bibliographic details  |
Categories: General Keywords: chemische Untersuchung = chemical analysis, Chrysemys, Chrysemys picta, Emydidae, Physiologie = physiology, Schildkröten = turtles + tortoises Creators: Crawford Collection: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
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1. 1. Urine production (V) and glomeruler filtration rate (GFR) was measured in summer- and winter-acclimatized painted turtles at 5, 15 and 25[deg]C.2. 2. V and GFR increased with increasing temperature and were greater in winter than in summer turtles at each test temperature, however the difference was not significant (P = 0.12 and 0.09, respectively).3. 3. The inulin U/P ratio decreased with decreasing temperature indicating that proportionally less filtrate is reabsorbed as temperature decreased (P 4. 4 Experimental hydration led to a marked increase in both V and GFR (P P = 0.37). The inulin U/P ratio did not change significantly with hydration (P = 0.46) indicating that the diuresis in hydrated turtles is best explained by changes in glomerular rather than tubular function.5. 5. The results indicate that renal function is temperature dependent and does not undergo significant seasonal acclimatization. The antidiuretic effect of cold temperature and apparent lack of seasonal compensation may reflect an energetic constraint resulting from the need to conserve metabolic energy during hibernation when temperature and oxygen availability are low.
Added by: Admin Last edited by: Admin |