Metabolic and Behavioural Long Period Ultradian Rhythms in Endotherms

Stupfel, M

doi:10.1007/978-1-4471-1969-2_11

Cited by 4 publications

(3 citation statements)

References 79 publications

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“…If this alternation is regular, the polyphasic temporal organisation can be quantified as an activity/rest cycle or an ultradian rhythm of activity. Many examples of ultradian rhythmicity have been reported at a behavioural level (Daan & Aschoff, 1981;Stupfel, 1995). The expression of ultradian rhythms appears clearer during ontogeny than during maturity (Daan & Aschoff, 1981); these rhythms are very difficult to reveal as they are particularly sensitive to masking effects due to the experimental conditions (Lavie, 1989).…”

Section: Introductionmentioning

confidence: 97%

Ultradian Rhythm of Activity in Japanese Quail Groups under Semi-Natural Conditions during Ontogeny: Functional Aspects and Relation to Circadian Rhythm

Lumineau¹,

Guyomarc’h²,

Richard³

2001

Biological Rhythm Research

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The function of ultradian rhythms is not yet clearly elucidated. In particular, shortterm rhythms are expressed during early ontogeny, especially in broods of precocial birds. We investigated the relationship between the clarity of the ultradian rhythm of the activity/rest cycle of a group of young Japanese quail (Coturnix japonica) and the level of social synchronisation and spatial cohesion between the birds within that group. The subjects were descended from two lines selected for either very pronounced rhythmic or arrhythmic circadian activity. We found a positive relationship between the clarity of the ultradian rhythm of the activity/rest cycle when birds were young and the clarity of the circadian rhythm of feeding activity when birds were older, but still immature.The temporal organisation of the behaviour of the chicks from these two lines was observed in outdoor aviaries, when they were 4, 8, 12 and 15 days old. The mean ultradian period expressed by groups of 12 chicks was variable, with a minimum of 6 minutes. The ultradian period lengthened regularly as chicks grew older, and reached approximately 40 min on day 15. The clarity of the ultradian rhythmicity of group activity was linked to the level of inter-individual social synchronisation and of spatial cohesion; the more pronounced the ultradian rhythms of a group, the greater the temporal and spatial cohesion of the chicks within the group. Moreover, these characteristics varied with the age of the chicks. Finally, chicks in the less rhythmic groups weighed less. These results stress the adaptive value of this temporal organisation strategy under natural conditions.

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Section: Introductionmentioning

confidence: 97%

Ultradian Rhythm of Activity in Japanese Quail Groups under Semi-Natural Conditions during Ontogeny: Functional Aspects and Relation to Circadian Rhythm

Lumineau¹,

Guyomarc’h²,

Richard³

2001

Biological Rhythm Research

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“…Finally, fine-tuning endocrine information is coded by the circa-hour oscillation of hypothalamic-pituitary hormones, which is modulated along the oestrous or menstrual cycle, representing a complex temporal mechanism in which ultradian, circadian, infradian (i.e. several days) and even seasonal components control the neuroendocrine regulation of physiology and behaviour [12].…”

Section: From Very Short (Ultradian Timing) mentioning

confidence: 99%

“…A prominent temperature-compensated ultradian clock is the circa-hour (i.e. about 1 h period) that occurs from lower eukaryotes such as Saccharomyces cerevisiae [11] to mammals [12]. Recent experiments in cardiac cells reveal parallels and similarities with yeast in the dynamic and biochemical organization of ultradian redox oscillations [13].…”

Section: From Very Short (Ultradian Timing) mentioning

confidence: 99%

Minutes, days and years: molecular interactions among different scales of biological timing

Golombék

Bussi

Agostino

2014

Phil. Trans. R. Soc. B

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Biological clocks are genetically encoded oscillators that allow organisms to keep track of their environment. Among them, the circadian system is a highly conserved timing structure that regulates several physiological, metabolic and behavioural functions with periods close to 24 h. Time is also crucial for everyday activities that involve conscious time estimation. Timing behaviour in the second-to-minutes range, known as interval timing, involves the interaction of cortico-striatal circuits. In this review, we summarize current findings on the neurobiological basis of the circadian system, both at the genetic and behavioural level, and also focus on its interactions with interval timing and seasonal rhythms, in order to construct a multi-level biological clock.

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Timing of activities of daily life is jaggy: How episodic ultradian changes in body and brain temperature are integrated into this process

Blessing

Ootsuka

2016

Temperature

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Charles Darwin noted that natural selection applies even to the hourly organization of daily life. Indeed, in many species, the day is segmented into active periods when the animal searches for food, and inactive periods when the animal digests and rests. This episodic temporal patterning is conventionally referred to as ultradian (<24 hours) rhythmicity. The average time between ultradian events is approximately 1–2 hours, but the interval is highly variable. The ultradian pattern is stochastic, jaggy rather than smooth, so that although the next event is likely to occur within 1–2 hours, it is not possible to predict the precise timing. When models of circadian timing are applied to the ultradian temporal pattern, the underlying assumption of true periodicity (stationarity) has distorted the analyses, so that the ultradian pattern is frequently averaged away and ignored. Each active ultradian episode commences with an increase in hippocampal theta rhythm, indicating the switch of attention to the external environment. During each active episode, behavioral and physiological processes, including changes in body and brain temperature, occur in an integrated temporal order, confirming organization by programs endogenous to the central nervous system. We describe methods for analyzing episodic ultradian events, including the use of wavelet mathematics to determine their timing and amplitude, and the use of fractal-based procedures to determine their complexity.

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Metabolic and Behavioural Long Period Ultradian Rhythms in Endotherms

Cited by 4 publications

References 79 publications

Ultradian Rhythm of Activity in Japanese Quail Groups under Semi-Natural Conditions during Ontogeny: Functional Aspects and Relation to Circadian Rhythm

Ultradian Rhythm of Activity in Japanese Quail Groups under Semi-Natural Conditions during Ontogeny: Functional Aspects and Relation to Circadian Rhythm

Minutes, days and years: molecular interactions among different scales of biological timing

Timing of activities of daily life is jaggy: How episodic ultradian changes in body and brain temperature are integrated into this process

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