Seasonal water influx and energy expenditure of free-living fat sand rats

A. A. Degen, A. Hazan, M. Kam, K. A. Nagy

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Psammomys obesus consumed only saltbush Atriplex halimus, did not drink water, and maintained constant body mass in summer and winter. Rates of water influx and energy expenditure of adults were greater in winter than in summer. Daily intake of dry matter by adults ranged from 9.3 (summer) to 11.0% (winter) of body mass; intake of fresh matter ranged from 24.7 (summer) to 32.0% (winter) of body mass. Water content of A. halimus consumed by adult fat sand rats was similar in the two seasons; therefore, the increase in water influx in winter was related mainly to a greater consumption of fresh matter. Juveniles selected saltbush leaves with greater water content than did adults. Intakes of dry matter and fresh matter by juveniles were 11.8 and 43.4% of their body masses, respectively. -from Authors

Original languageEnglish
Pages (from-to)652-657
Number of pages6
JournalJournal of Mammalogy
Issue number4
StatePublished - 1 Jan 1991

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Animal Science and Zoology
  • Genetics
  • Nature and Landscape Conservation


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