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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Seasonality and seasons out of time - The thermoregulatory effects of light interference
Chronobiology International, Volume 22, No. 1, Year 2005
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Description
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 4 h during the dark period significantly (p < 0.02) decreased VO2 at Ta = 15°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." Copyright © 2005 Taylor & Francis, Inc.
Authors & Co-Authors
Haim, Abraham
Israel, Haifa
University of Haifa
Shanas, Uri
Israel, Haifa
University of Haifa
Zubidad, Abed El Salam
Israel, Haifa
University of Haifa
Scantelbury, Michael
South Africa, Pretoria
University of Pretoria
Statistics
Citations: 45
Authors: 4
Affiliations: 2
Identifiers
Doi:
10.1081/CBI-200038144
ISSN:
07420528
Research Areas
Sexual And Reproductive Health