Time budget and 24-h temporal rest–activity patterns of captive red deer hinds

2006 ◽  
Vol 101 (3-4) ◽  
pp. 339-354 ◽  
Author(s):  
Dominique Pépin ◽  
Pierre-Cyril Renaud ◽  
Bertrand Dumont ◽  
Francis Decuq
Keyword(s):  
Red Deer ◽  
Time Budget ◽  
Activity Patterns ◽  
Rest Activity

scholarly journals Rest-activity patterns and falls and fractures in older men

2016 ◽  
Vol 28 (4) ◽  
pp. 1313-1322 ◽  
Author(s):  
Tara S. Rogers ◽  
Terri L. Blackwell ◽  
Nancy E. Lane ◽  
Greg Tranah ◽  
Eric S. Orwoll ◽  
...  
Keyword(s):  
Activity Patterns ◽  
Older Men ◽  
Rest Activity

scholarly journals Zeitgebers and their association with rest-activity patterns

2018 ◽  
Vol 36 (2) ◽  
pp. 203-213 ◽  
Author(s):  
Mirja Quante ◽  
Sara Mariani ◽  
Jia Weng ◽  
Catherine R Marinac ◽  
Emily R Kaplan ◽  
...  
Keyword(s):  
Activity Patterns ◽  
Rest Activity

scholarly journals Seasonal activity pattern of Swamp deer (Rucervus duvaucelii duvaucelii) in Dudhwa National Park, Uttar Pradesh, India

2014 ◽  
Vol 6 (1) ◽  
pp. 246-253 ◽  
Author(s):  
Kaleem Ahmed ◽  
Jamal A. Khan
Keyword(s):  
Activity Pattern ◽  
National Park ◽  
Time Budget ◽  
Activity Patterns ◽  
Winter Season ◽  
Uttar Pradesh ◽  
Seasonal Activity ◽  
Adult Males ◽  
Continuous Feeding ◽  
Swamp Deer

The data on activity pattern and time budget of Swamp deer (Rucervus duvauceli duvauceli) were collected through instantaneous scan sampling from Dudhwa National Park, Uttar Pradesh, India Diurnal activity pattern of Swamp deer showed marked reduction in resting in winter as compared to summer. In winter resting in adult males showed polymodal pattern with peaks occurring at different hours of the day and continued throughout the day without any break. Feeding of adult females in winter and summer seasons showed a polymodal pattern with peaks occurring at different hours of the day without break. In yearling males feeding and resting was observed to occur throughout the day during winter season with peaks occurring between 11:00 to 12:00 hours. Yearling females showed continuous feeding throughout the day with peaks in different times in both the seasons. The seasonal distribution of activity patterns of the fawns showed that feeding was slightly more in summer as compared to winter. In time budget, of the expenditure on different activities, resting accounted for 63.77% and feeding 24.70%. In both the seasons resting was the major portion of their activity. Analysis showed that in all age and sex categories of Swamp deer in the Dudhwa NP, resting dominated on all other activities. The observation on endangered Swamp deer indicates synchronization in activity only in the feeding in the morning and evening hours and resting throughout the day.

scholarly journals Rest-activity cycles and melatonin phase angle of circadian entrainment in people without cone-mediated vision

2020 ◽  
Author(s):  
Manuel Spitschan ◽  
Corrado Garbazza ◽  
Susanne Kohl ◽  
Christian Cajochen
Keyword(s):  
Ganglion Cells ◽  
Light Exposure ◽  
Activity Patterns ◽  
External World ◽  
Circadian Phase ◽  
Cone System ◽  
Retinohypothalamic Tract ◽  
Activity Cycles ◽  
Phase Angles ◽  
Rest Activity

AbstractLight is strong zeitgeber to the human circadian system, entraining internal rhythms in physiology and behaviour to the external world. This is mediated by the melanopsin-expressing intrinsically photosensitive retinal ganglion cells (ipRGCs), which sense light in addition to the classical photoreceptors, the cones and rods. Circadian responses depend on light intensity, with exposure to brighter light leading to bigger circadian phase shifts and melatonin suppression. In congenital achromatopsia (prevalence 1 in 30,000 to 50,000 people), the cone system is non-functional, resulting in light avoidance and photophobia at light levels which are tolerable and habitual to individuals with a normal, trichromatic retina. Here, we examined chronotype and self-reported sleep, actigraphy-derived rest-activity cycles and increases melatonin in the evening in a group of genetically confirmed congenital achromats. We found normal rest-activity patterns in all participants, and normal melatonin phase angles of entrainment in 2/3 of our participants. Our results suggest that a functional cone system and exposure to daytime light intensities are not necessary for regular behavioural and hormonal entrainment. This may point to a compensation mechanism in circadian photoreception, which in conjunction with non-photic zeitgebers, ensures synchronisation of activity to the external world.Significance statementRhythms in physiology and behaviour are synchronised to the external cycle of light exposure. This is mediated by the retinohypothalamic tract, which connects the photoreceptors in the eye with the “circadian pacemaker” in our brain, the suprachiasmatic nucleus. What happens to our circadian rhythm when we lack the cone photoreceptors in the eye that enable us to see in daylight? We examined this question in a group of rare congenital achromats. Our work reveals that normal rhythms in rest and activity, and production of hormones, does not require a functional cone system.

scholarly journals Activity Patterns of Red Deer in Białowieża National Park, Poland

2007 ◽  
Vol 88 (2) ◽  
pp. 508-514 ◽  
Author(s):  
Jan F. Kamler ◽  
Bogumiła Jędrzejewska ◽  
Włodzimierz Jędrzejewski
Keyword(s):  
National Park ◽  
Red Deer ◽  
Activity Patterns ◽  
Białowieża National Park

Nonparametric parameters of 24-hour rest-activity rhythms and long-term cognitive decline and incident cognitive impairment in older men

2021 ◽  
Author(s):  
Qian Xiao ◽  
Joshua N Sampson ◽  
Andrea Z LaCroix ◽  
Aladdin H Shadyab ◽  
Jamie M Zeitzer ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Mini Mental State Examination ◽  
Activity Patterns ◽  
Medication Use ◽  
Older Men ◽  
Activity Rhythms ◽  
Early Biomarkers ◽  
State Examination ◽  
Rest Activity

Abstract Altered 24-hour rest-activity rhythms may be associated with cognitive impairment in older adults, but evidence from prospective studies is limited. Non-parametric methods were used to assess actigraphy-based activity patterns in 2,496 older men. Incident cognitive impairment was assessed four times over 12 years using the Modified Mini Mental State Examination (3MS) and Trails B tests, self-reported medication use, and clinical diagnosis. The highest quartile (vs. the lowest) of intradaily variability and the lowest quartiles (vs. the highest) of interdaily stability and relative amplitude were associated with incident cognitive impairment ((Hazard ratio (95% confidence interval): 1.82 (1.31, 2.53)), 1.36 (0.99, 1.86), and 1.85 (1.33, 2.56), respectively). A larger increase in intradaily variability over 7.5 years was associated with a greater subsequent decline in 3MS scores but not in Trails B performance. In conclusion, less stable and more variable rest-activity rhythms may represent early biomarkers of cognitive impairment in older men.

scholarly journals Fragmentation of Rest/Activity Patterns in Community-Based Elderly Individuals Predicts Incident Heart Failure

2020 ◽  
Vol Volume 12 ◽  
pp. 299-307
Author(s):  
Lei Gao ◽  
Andrew SP Lim ◽  
Patricia M Wong ◽  
Arlen Gaba ◽  
Longchang Cui ◽  
...  
Keyword(s):  
Heart Failure ◽  
Activity Patterns ◽  
Community Based ◽  
Elderly Individuals ◽  
Incident Heart Failure ◽  
Rest Activity

scholarly journals Association of Daily Rest-Activity Patterns With Adiposity and Cardiometabolic Risk Measures in Teens

2019 ◽  
Vol 65 (2) ◽  
pp. 224-231 ◽  
Author(s):  
Mirja Quante ◽  
Elizabeth M. Cespedes Feliciano ◽  
Sheryl L. Rifas-Shiman ◽  
Sara Mariani ◽  
Emily R. Kaplan ◽  
...  
Keyword(s):  
Cardiometabolic Risk ◽  
Risk Measures ◽  
Activity Patterns ◽  
Rest Activity
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