The effects of water deprivation and salt load on water conservation efficiency in two Indian desert gerbils

Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
T O SasidharanP K Ghosh

Abstract

The effects of water deprivation and intraperitoneal salt loading on urine volume and on various urinary constituents have been examined in two gerbil species of the Rajasthan desert, the Indian desert gerbil (Meriones hurrianae Jerdon) and the Indian gerbil (Tatera indica indica Hardwicke). During summer, hydrated T. indica excreted 0.782 ml urine.100 g-1.d-1 which was about 60.5% higher than the volume of urine excreted by hydrated M. hurrianae (0.487 ml.100 g-1.d-1). During winter, both species excreted around 1.5 ml urine.100 g-1.d-1. The experimental treatments caused reductions in urine volume in M. hurrianae from 40 to 76% during summer and from 35 to 71% in winter. Similar treatments in T. indica caused reductions in urine volume of 50-82% in summer and 5-60% in winter. The mean increase in urine osmolarity following various salt loading treatments in T. indica ranged from 3800 to 5761 mosmol.l-1 and from 4034 to 6255 mosmol.l-1 during summer and winter, respectively. The mean values of urine osmolarity for hydrated T. indica were 2831 and 3189 mosmol.l-1 during summer and winter, respectively. In M. hurrianae salt loading treatments caused increases of urine osmolarity between 3381 and 5646 mosmol.l-1 and between 4032 ...Continue Reading

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Citations

Jan 1, 1988·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·S P GoyalP Chand
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Body Water
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Kidney Concentrating Ability
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