Renal excretion capacity in hydrated desert rodents (Jaculus orientalis and Jaculus deserti).
The capacity to excrete a water load was studied in rats and in two desert rodents (Jaculus orientalis and Jaculus deserti) adapted to either 5 or 30 degrees C ambient temperature. The rat is able to eliminate the entire water load regardless of thermal adaptation. Cold-adapted J. orientalis and J. deserti excreted 60% of the water load in comparison to 20-30% in warm-adapted jerboas. At both adaptation temperatures, antidiuretic hormone (ADH) concentration was estimated at maximum diuresis in the two desert species. Though hydration induced a significant decrease in ADH concentration in both species, its level in the plasma remained relatively high. The decrease was more pronounced in J. orientalis than J. deserti.
D000064:Acclimatization; D000222:Adaptation, Physiological; D000818:Animals; D003889:Desert Climate; D004231:Diuresis; D007668:Kidney / Q000502:physiology*; D007700:Kinetics; D051381:Rats; D012377:Rodentia / Q000502:physiology*; D013045:Species Specificity; D013696:Temperature; D014667:Vasopressins / Q000097:blood
D014667:Vasopressins