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Developmental effects of constant light on circadian behaviour and gene expressions in zebra finches: Insights into mechanisms of metabolic adaptation to aperiodic environment in diurnal animals
Constant light’s effects on daily activity and gene patterns in zebra finches: clues to how day-active animals adjust metabolism to irregular environments
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Abstract
Under constant light conditions, 80% of zebra finches displayed rhythmic activity despite disrupted clock gene expression.
- Zebra finches raised in constant light gained weight and accumulated fat in the liver.
- Normal body mass and 24-hour rhythms in activity and mRNA expression were observed in birds under a typical light-dark cycle.
- Clock gene expression was disrupted in the hypothalamus of birds under constant light, affecting genes related to light perception and circadian rhythms.
- In peripheral tissues, 24-hour rhythms for some clock genes were maintained, while others were abolished under constant light conditions.
- Nutrient absorption and biosynthesis gene expressions were altered, with some genes showing arrhythmic behavior under constant light.
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