Biomaterial Database

[Circadian and seasonal changes in the temperature-regulating behavior of the American ground squirrel Citellus parryi]. 1995

Iu F Pastukhov, and Z G Nevretdinova, and B I Slovikov

Under uninterrupted (during 10 days) temperature registration from 4 nest boxes ("thermogradient" plant) clear-cut changes were determined: in preferable temperature (PT, degrees C, in 24 hrs at an average)--21.0 +/- 0.5 (spring), 22.7 +/- 0.3 (summer), 18.8 +/- 0.7 (autumn), 11.5 +/- 0.5 (period before hibernation-PBH), 7.5 +/- 7.9 (hibernation season); in locomotor activity duration (LA, per cent from 24 hrs) which has decreased from 29.6% in spring to 20.3% at PBH (p < 0.001), and approximately to 2-3% during hibernation season; and in body mass which has varied from 350 g in spring to 750 at PBH. An increase in LA circadian rhythm amplitude was revealed in autumn, and the appearance and a rapid increase in PT circadian rhythm amplitude were observed at the beginning of PBH. A stage-to-stage "upswinging" of activity/rest circadian rhythms (stage I) and of thermoregulatory behavior (stage II) are supposed to occur at the end of euthermy season, which promotes synchronizing of the physiological processes and extending of the thermoneutra zone before the entrance into torpor and hibernation.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009043	Motor Activity	Body movements of a human or an animal as a behavioral phenomenon.	Activities, Motor,Activity, Motor,Motor Activities
D001833	Body Temperature Regulation	The processes of heating and cooling that an organism uses to control its temperature.	Heat Loss,Thermoregulation,Regulation, Body Temperature,Temperature Regulation, Body,Body Temperature Regulations,Heat Losses,Loss, Heat,Losses, Heat,Regulations, Body Temperature,Temperature Regulations, Body,Thermoregulations
D001835	Body Weight	The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.	Body Weights,Weight, Body,Weights, Body
D002940	Circadian Rhythm	The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs or environmental and physiological stimuli.	Diurnal Rhythm,Nyctohemeral Rhythm,Twenty-Four Hour Rhythm,Nycthemeral Rhythm,Circadian Rhythms,Diurnal Rhythms,Nycthemeral Rhythms,Nyctohemeral Rhythms,Rhythm, Circadian,Rhythm, Diurnal,Rhythm, Nycthemeral,Rhythm, Nyctohemeral,Rhythm, Twenty-Four Hour,Rhythms, Circadian,Rhythms, Diurnal,Rhythms, Nycthemeral,Rhythms, Nyctohemeral,Rhythms, Twenty-Four Hour,Twenty Four Hour Rhythm,Twenty-Four Hour Rhythms
D005260	Female		Females
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012589	Sciuridae	A family of the order Rodentia which contains 49 genera. Some of the more common genera are MARMOTA, which includes the marmot and woodchuck; Sciurus, the gray squirrel, S. carolinensis, and the fox squirrel, S. niger; Tamias, the eastern and western chipmunk; and Tamiasciurus, the red squirrel. The flying squirrels, except the scaly-tailed Anomaluridae, also belong to this family.	Chipmunks,Citellus,Eutamias,Prairie Dogs,Spermophilus,Squirrels,Susliks,Tamias,Chipmunk,Dog, Prairie,Dogs, Prairie,Prairie Dog,Squirrel,Suslik
D012621	Seasons	Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Seasonal Variation,Season,Seasonal Variations,Variation, Seasonal,Variations, Seasonal
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures

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