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Author (up) Haim, A.; Shanas, U.; Zubidad, A.E.S.; Scantelbury, M. url  doi
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  Title Seasonality and Seasons Out of Time--The Thermoregulatory Effects of Light Interference Type Journal Article
  Year 2005 Publication Chronobiology International Abbreviated Journal Chronobiol Int  
  Volume 22 Issue 1 Pages 59-66  
  Keywords *Photoperiod; Microtus socialis; voles; thermoregulation; biology; animals  
  Abstract The change in photoperiod is the main environmental cue for seasonal function of the reproductive, thermoregulatory, and immune systems in rodents existing outside of the tropics. In Israel, the social vole Microtus socialis breeds mainly under short photoperiod (SP) conditions. Previous studies showed that exposing voles to light interference (LI) in the field during the winter resulted in death. The aim of the current study was to determine the thermoregulatory response of SP-acclimated voles to LI. Therefore, heat production (VO2) at different ambient temperatures (Ta) and nonshivering thermogenesis (NST) were measured. Results show that LI of 15 min every 4h during the dark period significantly (p < 0.02) decreased VO2 at Ta = 15 degrees C and significantly (p < 0.05) decreased NST-capacity. These results can at least partly explain why LI-voles died during the winter under field conditions, through eliminating winter acclimatization of the thermoregulatory system, or what is considered as “seasons out of time.”  
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  Series Volume Series Issue Edition  
  ISSN 0742-0528 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 32  
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