PMID: 9438883Aug 1, 1997Paper

Circadian patterns of locomotor activity and body temperature in blind mole-rats, Spalax ehrenbergi

Journal of Biological Rhythms
B D GoldmanJ Terkel

Abstract

A wide variety of organisms exhibit circadian rhythms, regulated by internal clocks that are entrained primarily by the alternating cycle of light and darkness. There have been few studies of circadian rhythms in fossorial species that inhabit a microenvironment where day-night variations in most environmental parameters are minimized and where exposure to light occurs only infrequently. In this study, daily patterns of locomotor activity and body temperature (Tb) were examined in adult blind mole-rats (Spalax ehrenbergi). These fossorial rodents lack external eyes but possess rudimentary ocular structures that are embedded in the Harderian glands and covered by skin and fur. Most individual mole-rats exhibited circadian rhythms of locomotor activity, but some animals were arrhythmic. Individuals that did exhibit robust rhythms of locomotor activity also showed rhythms of Tb. In most cases, Tb was highest during the phase of intense locomotor activity. Locomotor activity rhythms could be entrained to light:dark cycles, and several mole-rats exhibited entrainment to non-24-h light cycles (T-cycles) with period lengths ranging from T = 23 h to T = 25 h. Some individuals also showed entrainment to daily cycles of ambient temperatu...Continue Reading

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Citations

Jan 14, 2005·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·John R HetlingThomas J Park
Jan 20, 2006·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·R Refinetti
Feb 16, 2006·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Beatriz CaballeroAna Coto-Montes
Feb 22, 1991·Brain Research. Developmental Brain Research·G BronchtiZ Wollberg
Jan 3, 2001·Physiology & Behavior·A P Riccio, B D Goldman
Jan 3, 2001·Physiology & Behavior·A P Riccio, B D Goldman
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Nov 16, 2002·Progress in Retinal and Eye Research·Russell G Foster, Mark W Hankins
Nov 17, 2001·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·R G Foster, C Helfrich-Förster
Oct 12, 2013·PloS One·Martin Sládek, Alena Sumová
Nov 15, 2001·Proceedings of the National Academy of Sciences of the United States of America·A AviviE Nevo
Jan 15, 2009·Chronobiology International·Veronica Sandra ValentinuzziMartin Roland Ralph
Dec 22, 2006·The Journal of Comparative Neurology·Greta J RosenNancy G Forger
Oct 9, 2004·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Jacopo P Mortola, Clement Lanthier
Feb 7, 2006·Physiology & Behavior·Rotem Cohen, Noga Kronfeld-Schor
Aug 4, 2010·Journal of Biological Rhythms·Roberto Refinetti
May 25, 2004·Journal of Biological Rhythms·Ronald J TavernierAbel Bult-Ito
Dec 12, 2003·Journal of Biological Rhythms·Maria K OosthuizenNigel C Bennett
Dec 1, 2020·Temperature : Multidisciplinary Biomedical Journal·Roberto Refinetti
Jan 18, 2021·Journal of Thermal Biology·Jan OkrouhlíkNigel Charles Bennett
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Nov 30, 2010·The Journal of Experimental Biology·Abed E ZubidatAbraham Haim
Nov 17, 2009·The Journal of Experimental Biology·A E ZubidatA Haim

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