Sleep and nesting behavior in primates: A review.
- Biology, PsychologyAmerican journal of physical anthropology
This work summarizes and synthesizes major hypotheses explaining the proximate and ultimate functions of great ape nest building across all species and subspecies, and proposes bridging disciplines such as neurobiology, endocrinology, medicine, and evolutionary ecology so that future research may disentangle the major functions of sleep in human and nonhuman primates.
Energetic constraints, not predation, influence the evolution of sleep patterning in mammals.
- Biology, PsychologyFunctional ecology
Neither sleep-cycle length nor phasing of sleep was significantly associated with three different measures of predation risk, undermining the idea that they represent anti-predator adaptations.
The ecological relevance of sleep: the trade-off between sleep, memory and energy conservation
- Biology, PsychologyPhilosophical Transactions of the Royal Society B: Biological Sciences
It is suggested that the food-caching paradigm represents a naturalistic and experimentally practical system that provides the opportunity for a new direction in sleep research that will expand the understanding of sleep, especially within the context of ecological and evolutionary processes.
Sleeping Birds Do Not Respond to Predator Odour
- Biology, PsychologyPloS one
The results suggest that birds are not able to detect predator chemical cues while sleeping, and antipredatory strategies taken before sleep, such as roosting sites inspection, may be crucial to cope with the vulnerability to predation risk while sleeping.
Sleeping outside the box: electroencephalographic measures of sleep in sloths inhabiting a rainforest
- BiologyBiology Letters
The first electroencephalogram (EEG) recordings of sleep on unrestricted animals in the wild using a recently developed miniaturized EEG recorder are performed, and it is found that brown-throated three-toed sloths inhabiting the canopy of a tropical rainforest only sleep 9.63 h d−1, over 6 H less than previously reported in captivity.
Ecological constraints on mammalian sleep architecture
- Biology, Environmental Science
The evidence for how ecological factors, including predation risk and foraging requirements, might shape patterns of sleep among mammals is reviewed and the dramatic differences in sleep characteristics of terrestrial and aquatic mammals provide evidence for the claim that ecology influences sleep architecture.
Ecological and social pressures interfere with homeostatic sleep regulation in the wild
- Psychology, BiologybioRxiv
Using tri-axial accelerometry and GPS to track the sleep patterns of a group of wild baboons (Papio anubis) at multiple temporal and spatial scales, it is found that ecological and social pressures indeed interfere with homeostatic sleep regulation.
Sleep and vigilance linked to melanism in wild barn owls
- Biology, PsychologyJournal of evolutionary biology
It is concluded that different strategies of the regulation of brain activity have evolved and are correlated with melanin‐based coloration and Owlets from heavily spotted mothers might invest more in vigilance, thereby possibly increasing associated costs due to sleep fragmentation.
Wild primate sleep: understanding sleep in an ecological context
- Environmental Science, Psychology
History and future of comparative analyses in sleep research
- Biology, PsychologyNeuroscience & Biobehavioral Reviews
SHOWING 1-10 OF 137 REFERENCES
Sleep in Mammals : Ecological and Constitutional Correlates
The interrelationships between sleep, ecological, and constitutional variables were assessed statistically for 39 mammalian species and found that both constitutional and ecological influences are important predictors of the amount and type of sleep obtained by mammals.
Facultative control of avian unihemispheric sleep under the risk of predation
- Biology, Environmental ScienceBehavioural Brain Research
Sleep, sleeping sites, and sleep‐related activities: Awakening to their significance
- Biology, PsychologyAmerican journal of primatology
Recent progress in the ethology and ecology of sleep in diurnal monkeys and apes is reviewed, with emphasis on safety from predators at sleeping sites, physical comfort, social behavior, and psychophysiology of sleep.
Slow wave sleep in crayfish.
- BiologyProceedings of the National Academy of Sciences of the United States of America
It is shown that, in crayfish, a behavioral state with elevated threshold for vibratory stimulation is accompanied by a distinctive form of slow wave electrical activity of the brain, quite different from that during waking rest, and therefore, cray fish can attain a sleep state comparable to that of mammals.
The Phasing of Sleep in Animals
- Biology, Psychology
To explain the variety of the phasing of sleep is to confront both the reasons for sleep and the principles behind the scheduling of behavior.
A Synthesis of Sleep in Wild Birds
- Psychology, Biology
This synthesis tries to survey and reanalyse the current literature concerning bird sleep and suggests a model based on eyelid blinking which allows for a degree of vigilance during sleep but which is also compatible with minimizing energy expenditure.
The Evolution of Sleep: A Phylogenetic Approach
- Biology, Psychology
The electrophysiological hallmarks of mammalian sleep are often used as the ‘‘gold standard’’ for sleep in nonmammals, while sleep in other vertebrate classes has largely been neglected.
PREDATOR VIGILANCE AND GROUP SIZE IN MAMMALS AND BIRDS: A CRITICAL REVIEW OF THE EMPIRICAL EVIDENCE
- Environmental ScienceBiological reviews of the Cambridge Philosophical Society
Most of the studies fail to adequately demonstrate an unambiguous relationship between vigilance behaviour and group size, but many studies reveal interesting features of the relationship between Vigilance and Group size that should provide fruitful avenues for future research.
Strategies used by bonnet macaques (Macaca radiata) to reduce predation risk while sleeping
- Environmental SciencePrimates
The results indicate that bonnet macaques adopted a suite of behaviors that reduced their risk of being preyed upon at night by selecting sleeping sites that minimized predator encounters and by selecting the safest locations within the canopy.