The effect of restricted feeding on the wheel-running activity rhythms of the predatory marsupial Dasyurus viverrinus

1990 ◽  
Vol 166 (5) ◽  
Author(s):  
GerardA. Kennedy ◽  
GrahameJ. Coleman ◽  
StuartM. Armstrong
Keyword(s):  
Wheel Running ◽  
Restricted Feeding ◽  
Activity Rhythms ◽  
Running Activity ◽  
Wheel Running Activity

Restricted feeding entrains circadian wheel-running activity rhythms of the kowari

1991 ◽  
Vol 261 (4) ◽  
pp. R819-R827 ◽  
Author(s):  
G. A. Kennedy ◽  
G. J. Coleman ◽  
S. M. Armstrong
Keyword(s):  
Pilot Study ◽  
Wheel Running ◽  
Light Period ◽  
Restricted Feeding ◽  
Activity Rhythms ◽  
Running Activity ◽  
Wheel Running Activity ◽  
Free Running ◽  
Anticipatory Activity ◽  
Constant Dark

The effect of daily restricted feeding (RF) on the circadian wheel-running rhythms of the kowari, Dasyuroides byrnei, was examined in two experiments. Kowaris were presented with a preferred food (determined in a pilot study) during a daily 2-h meal in the light period of a 14:10 light-dark (LD) cycle (expts 1 and 2), during constant dark (DD) immediately after termination of the LD cycle (expt 1), and during DD when kowaris were free running (expt 1). Results showed that 1) RF elicited anticipatory activity similar in duration and phasing to that observed in the rat; 2) cycles of meal-associated activity free ran for up to 6 days after the termination of RF; 3) activity persists at a phase near that of the former mealtime during periods of food deprivation; and 4) activity indicative of beating between two pacemakers occurred when feeding was restricted to the L period of LD cycles. Together these observations suggest that the activity rhythms of the kowari may be controlled by separate, but possibly coupled, light-entrainable and food-entrainable pacemakers, as are those of the rat.

scholarly journals Wheel-running activity rhythms in two inbred strains of laboratory rats under different photoperiods

1991 ◽  
Vol 50 (6) ◽  
pp. 1137-1143 ◽  
Author(s):  
Ursula Siebert ◽  
Franziska Wollnik
Keyword(s):  
Wheel Running ◽  
Inbred Strains ◽  
Activity Rhythms ◽  
Laboratory Rats ◽  
Running Activity ◽  
Wheel Running Activity

scholarly journals Estrous correlated modulations of circadian and ultradian wheel-running activity rhythms in LEW/Ztm rats

1988 ◽  
Vol 43 (3) ◽  
pp. 389-396 ◽  
Author(s):  
Franziska Wollnik ◽  
Fred W. Turek
Keyword(s):  
Wheel Running ◽  
Activity Rhythms ◽  
Running Activity ◽  
Wheel Running Activity

scholarly journals Altered circadian activity and sleep/wake rhythms in the stable tubule only polypeptide (STOP) null mouse model of schizophrenia

SLEEP ◽  
2020 ◽  
Author(s):  
Samuel Deurveilher ◽  
Kristin Robin Ko ◽  
Brock St C Saumure ◽  
George S Robertson ◽  
Benjamin Rusak ◽  
...  
Keyword(s):  
Wheel Running ◽  
Active Phase ◽  
Null Mouse ◽  
Wild Type ◽  
Activity Rhythms ◽  
Lighting Conditions ◽  
Running Activity ◽  
Wheel Running Activity ◽  
Lower Amplitude ◽  
Free Running

Abstract Sleep and circadian rhythm disruptions commonly occur in individuals with schizophrenia. Stable tubule only polypeptide (STOP) knockout (KO) mice show behavioral impairments resembling symptoms of schizophrenia. We previously reported that STOP KO mice slept less and had more fragmented sleep and waking than wild-type littermates under a light/dark (LD) cycle. Here, we assessed the circadian phenotype of male STOP KO mice by examining wheel-running activity rhythms and EEG/EMG-defined sleep/wake states under both LD and constant darkness (DD) conditions. Wheel-running activity rhythms in KO and wild-type mice were similarly entrained in LD, and had similar free-running periods in DD. The phase delay shift in response to a light pulse given early in the active phase under DD was preserved in KO mice. KO mice had markedly lower activity levels, lower amplitude activity rhythms, less stable activity onsets, and more fragmented activity than wild-type mice in both lighting conditions. KO mice also spent more time awake and less time in rapid eye movement sleep (REMS) and non-REMS (NREMS) in both LD and DD conditions, with the decrease in NREMS concentrated in the active phase. KO mice also showed altered EEG features and higher amplitude rhythms in wake and NREMS (but not REMS) amounts in both lighting conditions, with a longer free-running period in DD, compared to wild-type mice. These results indicate that the STOP null mutation in mice altered the regulation of sleep/wake physiology and activity rhythm expression, but did not grossly disrupt circadian mechanisms.

Circadian wheel running activity rhythms in two strains of domestic rabbit

1994 ◽  
Vol 55 (2) ◽  
pp. 385-389 ◽  
Author(s):  
Gerard A Kennedy ◽  
Robyn Hudson ◽  
Stuart Maxwell Armstrong
Keyword(s):  
Wheel Running ◽  
Activity Rhythms ◽  
Domestic Rabbit ◽  
Running Activity ◽  
Wheel Running Activity

Behavioral characterization and modulation of circadian rhythms by light and melatonin in C3H/HeN mice homozygous for the RORβ knockout

2007 ◽  
Vol 292 (6) ◽  
pp. R2357-R2367 ◽  
Author(s):  
Monica I. Masana ◽  
Isabel C. Sumaya ◽  
Michael Becker-Andre ◽  
Margarita L. Dubocovich
Keyword(s):  
Circadian Rhythms ◽  
Light Pulse ◽  
Learned Helplessness ◽  
Wheel Running ◽  
Receptor Gene ◽  
Activity Rhythms ◽  
Pineal Melatonin ◽  
Running Activity ◽  
Melatonin Administration ◽  
Wheel Running Activity

This study reports for the first time the effects of retinoid-related orphan receptors [RORβ; receptor gene deletion RORβ(C3H)−/−] in C3H/HeN mice on behavioral and circadian phenotypes. Pineal melatonin levels showed a robust diurnal rhythm with high levels at night in wild-type (+/+), heterozygous (+/−), and knockout (−/−) mice. The RORβ(C3H)−/− mice displayed motor (“duck gait,” hind paw clasping reflex) and olfactory deficits, and reduced anxiety and learned helplessness-related behaviors. Circadian rhythms of wheel-running activity in all genotypes showed entrainment to the light-dark (LD) cycle, and free running in constant dark, with RORβ(C3H)−/− mice showing a significant increase in circadian period ( tau). Melatonin administration (90 μg/mouse sc for 3 days) at circadian time (CT) 10 induced phase advances, while exposure to a light pulse (300 lux) at CT 14 induced phase delays of circadian activity rhythms of the same magnitude in all genotypes. In RORβ(C3H)−/− mice a light pulse at CT 22 elicited a larger phase advance in activity rhythms and a slower rate of reentrainment after a 6-h advance in the LD cycle compared with (+/+) mice. Yet, the rate of reentrainment was significantly advanced by melatonin administration at the new dark onset in both (+/+) and (−/−) mice. We conclude that the RORβ nuclear receptor is not involved in either the rhythmic production of pineal melatonin or in mediating phase shifts of circadian rhythms by melatonin, but it may regulate clock responses to photic stimuli at certain time domains.

Circadian wheel-running activity rhythms are unaltered by acute cage enrichment with nests and shelters

2016 ◽  
Vol 47 (6) ◽  
pp. 909-917
Author(s):  
Josh Boyce ◽  
Peggy Goins ◽  
Lauren M. Sigg ◽  
Bernard Possidente
Keyword(s):  
Wheel Running ◽  
Activity Rhythms ◽  
Running Activity ◽  
Wheel Running Activity

Wheel-running activity rhythms and masking responses in the diurnal palm squirrel, Funambulus pennantii

2020 ◽  
Vol 37 (12) ◽  
pp. 1693-1708
Author(s):  
Dhanananajay Kumar ◽  
Sanjeev Kumar Soni ◽  
Noga Kronfeld-Schor ◽  
Muniyandi Singaravel
Keyword(s):  
Wheel Running ◽  
Activity Rhythms ◽  
Running Activity ◽  
Wheel Running Activity

scholarly journals Effect of photoperiod on the development of wheel-running activity rhythms in LEW/Ztm rats

1993 ◽  
Vol 53 (6) ◽  
pp. 1145-1150 ◽  
Author(s):  
Ursula Siebert ◽  
Franziska Wollnik
Keyword(s):  
Wheel Running ◽  
Activity Rhythms ◽  
Running Activity ◽  
Wheel Running Activity

Activity Rhythms in the Marsupials Isoodon macrourus and Perameles nasuta in Captivity

1981 ◽  
Vol 29 (6) ◽  
pp. 821 ◽  
Author(s):  
AG Lyne
Keyword(s):  
Wheel Running ◽  
Red Light ◽  
Continuous Light ◽  
Activity Rhythms ◽  
Artificial Lighting ◽  
Running Activity ◽  
Wheel Running Activity ◽  
Body Weights ◽  
In Captivity ◽  
Night And Day

Exercise wheels and closed-circuit television were used to record the activity rhythms of 34 1. macrourus and 32 P, nasuta (1) outdoors; (2) indoors with natural light; (3) indoors with artificial light in which the phases of night and day were normal; (4) same as (3) but with the phases of night and day reversed; (5) continuous dark; (6) continuous light. In tests (3)-(6) a faint red light was on continuously. These tests were made on animals caged singly or in pairs and lasted for periods of from 8 to 357 days. When a male and a female of different body weights were tested together, the animal using the wheel was identified by its weight. Five I. macrourus and 23 P. nasuta exposed to normal phases of night and day were active mainly during the dark periods. The daily activity pattern varied considerably but was fairly constant for individuals. When the phases of night and day were reversed, the animals continued to be active during the dark periods and, in many of them, the pattern of activity was similar to that under normal phases of night and day. They were, therefore, entrained to the artificial lighting system. However, in 17 out of 31 P. nasuta and 5 out of 31 1. macrourus exposed to reversed lighting conditions, activity started later each day. When the trigger for exercise began to fall close to the beginning of a light period, no activity was taken; the animals did not run in the wheel or take other exercise for 2-5 days, feeding and drinking were greatly reduced and some animals did not leave the nest box for 1-2 days. After this pause, exercise began again at the beginning of a dark period. In 10 I. macrourus exposed to continuous dark the period of the endogenous rhythm was either more than or less than 24 h, and in continuous light (four animals), the wheel-running activity was greatly reduced.

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