Activity budgets and activity rhythms in red ruffed lemurs (Varecia rubra) on the Masoala Peninsula, Madagascar: seasonality and reproductive energetics

2005 ◽  
Vol 66 (1) ◽  
pp. 23-44 ◽  
Author(s):  
Natalie Vasey
Keyword(s):  
Activity Budgets ◽  
Activity Rhythms ◽  
Varecia Rubra ◽  
Masoala Peninsula ◽  
Reproductive Energetics

scholarly journals Size is not everything: differing activity and foraging patterns between the sexes in a monomorphic mammal

2021 ◽  
Vol 75 (4) ◽  
Author(s):  
H.K. Lodberg-Holm ◽  
S.M.J.G. Steyaert ◽  
S. Reinhardt ◽  
F. Rosell ◽  
Hanna Kavli Lodberg-Holm
Keyword(s):  
Aquatic Vegetation ◽  
Late Summer ◽  
Seasonal Activity ◽  
Circadian Activity ◽  
Activity Budgets ◽  
Foraging Patterns ◽  
Activity Rhythms ◽  
Food Items ◽  
Body Sizes ◽  
Males And Females

Abstract Animals balance foraging with other activities, and activity patterns may differ between sexes due to differing physical requirements and reproductive investments. Sex-specific behavioural differences are common in sexually dimorphic mammals, but have received limited research attention in monomorphic mammals where the sexes are similar in body size. Eurasian beavers (Castor fiber) are obligate monogamous and monomorphic mammals and a good model species to study sex-specific differences. As females increase energy expenditure during reproduction, we hypothesized differing seasonal activity budgets, circadian activity rhythms and foraging patterns between male and reproducing female beavers. To test this hypothesis, we equipped adult beavers with VHF transmitters (N=41; 16 female, 25 male) and observed them throughout their active period at night from spring to late summer. Occurrence of their main activities (foraging, travelling and being in lodge) and use of food items (trees/shrubs, aquatic vegetation and herbs/grasses) were modelled to investigate sex-specific seasonal activity budgets and circadian activity rhythms. The sexes did not differ in time spent foraging across the season or night, but during spring, females resided more in the lodge and travelled less. Males and females both foraged on aquatic vegetation during spring, but females used this food source also during late summer, whereas males mostly foraged on trees/shrubs throughout the year. We conclude that seasonal activity budgets and foraging differ subtly between the sexes, which may relate to different energy budgets associated with reproduction and nutritional requirements. Such subtle seasonal behavioural adaptions may be vital for survival and reproduction of monomorphic species. Significance statement Activity budgets and foraging patterns of animals are key to their survival and may differ between males and females with different body sizes and physical requirements. In monomorphic species, where males and females have similar body sizes, fewer differences are expected, but may still be pronounced during certain times of the year. We modelled sex-specific seasonal activity budgets and circadian activity rhythms and use of food items in a monomorphic mammal, the Eurasian beaver. By treating season and time of day as a continuous variable rather than modelling differences within distinct predefined periods, we identified subtle sex-specific seasonal trends in activity budgets and use of food items.

Monitoring activity rhythms ofEquus hemionusat watering holes by camera traps in Mount Kalamaili Ungulate Nature Reserve, Xinjiang

2014 ◽  
Vol 22 (6) ◽  
pp. 752
Author(s):  
Wu Hongpan ◽  
Chu Hongjun ◽  
Wang Yuan ◽  
Ma Jianwei ◽  
Ge Yan ◽  
...  
Keyword(s):  
Nature Reserve ◽  
Camera Traps ◽  
Activity Rhythms ◽  
Monitoring Activity

scholarly journals 0897 Low Stability In Rest Activity Rhythms Is Associated With Higher Suicidal Ideation In Adolescents With Bipolar Disorder

SLEEP ◽  
2019 ◽  
Vol 42 (Supplement_1) ◽  
pp. A360-A361
Author(s):  
Qianyi Chen ◽  
Peter Franzen ◽  
Tina Goldstein ◽  
Sarah Gratzmiller
Keyword(s):  
Bipolar Disorder ◽  
Suicidal Ideation ◽  
Activity Rhythms ◽  
Rest Activity

scholarly journals A Systematic Review of Evidence for a Role of Rest-Activity Rhythms in Dementia

2019 ◽  
Vol 10 ◽  
Author(s):  
Stephen F. Smagula ◽  
Swathi Gujral ◽  
Chandler S. Capps ◽  
Robert T. Krafty
Keyword(s):  
Systematic Review ◽  
Activity Rhythms ◽  
Rest Activity

753 The role of circadian activity rhythms in depressive symptoms among female nursing students

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A293-A294
Author(s):  
Xin Zhang ◽  
Shih-Yu Lee
Keyword(s):  
Nursing Education ◽  
Depressive Symptoms ◽  
Nursing Students ◽  
Conceptual Model ◽  
Depression Scale ◽  
Psychological Problems ◽  
Circadian Activity ◽  
Activity Rhythms ◽  
Wrist Actigraphy ◽  
Insomnia Symptoms

Abstract Introduction Depression is prevalent among nursing students. Rumination and sleep-wake rhythms are associated to mental illness; however, no clear path has been found. This exploratory study aimed to examine the associations among circadian activity rhythms (CAR), rumination, and depressive symptoms in female nursing students; further, to test a hypothesized CAR conceptual model. Methods A total of 148 female nursing junior students in China completed a battery of questionnaires, including Athens Insomnia Scale (AIS), Ruminative Responses Scale (RRS), and Self-rating Depression Scale (SDS). Wrist actigraphy was used to collect total sleep time, CAR, and acrophase (time of the peak of the fitted activity curve). The path analysis was explored by using SPSS and AMOS. Results The mean age of the students was 20.64 years (SD = 0.86). About 58.8% of the participants were either mild or moderate depressed. About 93.9% of the students reported significant insomnia symptoms (AIS scores >6). Rumination was measured by the RRS (M= 2.01, SD = 0.54), and students scored higher in brooding than that of reflective pondering (2.07 vs. 1.95). The average of TST was 394.59 minutes (SD = 51.92). The CAR ranged from 0.40 to 0.98, with a mean of 0.75 (SD = 0.11). The acrophase ranged from 12:46 to 20:14 (median 16:30), with a later acrophase indicates of a more delayed circadian phase. The final model shows satisfactory fit (χ2= 2.238, p= .327); a better CAR can indirectly reduce depressive symptoms by directly reducing brooding (B = -1.149) and improving insomnia symptoms (B = -6.6443). Conclusion In order to prevent psychological problems of nursing students, ruminating and CAR should be part of health screening. The novel conceptual model provides a basis for reforming nursing education to prevent psychological problems. Support (if any) Chinese National Natural Science Foundation [71603279]

Rest-activity rhythms in emerging adults: implications for cardiometabolic health

2021 ◽  
pp. 1-14
Author(s):  
Elissa K. Hoopes ◽  
Melissa A. Witman ◽  
Michele N. D’Agata ◽  
Felicia R. Berube ◽  
Benjamin Brewer ◽  
...  
Keyword(s):  
Emerging Adults ◽  
Cardiometabolic Health ◽  
Activity Rhythms ◽  
Rest Activity
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