ArticleAmerican journal of physiology. Regulatory, integrative and comparative physiology2010
Effects of photoperiod on daily locomotor activity, energy expenditure, and feeding behavior in a seasonal mammal.
Article in American journal of physiology. Regulatory, integrative and comparative physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed.
- Resting metabolic rate is repeatable, but does not affect call characteristics, in the gray treefrog Hyla chrysoscelis.The Journal of experimental biology · 2025Article
- Photo-refractoriness reflects bet-hedging strategies deployed in unpredictable environments in male Brandt's voles.Zoological letters · 2025Article
- Tanycytes from a bird's eye view: gene expression profiling of the tanycytic region under different seasonal states in the Svalbard ptarmigan.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2025Article
- Disentangling environmental drivers of circadian metabolism in desert-adapted mice.The Journal of experimental biology · 2021Article
- Whole-body and adipose tissue-specific mechanisms underlying the metabolic effects of fibroblast growth factor 21 in the Siberian hamster.Molecular metabolism · 2020Article
- Interscapular and Perivascular Brown Adipose Tissue Respond Differently to a Short-Term High-Fat Diet.Nutrients · 2019Article
- Photoperiodic changes in adiposity increase sensitivity of female Siberian hamsters to systemic VGF derived peptide TLQP-21.PloS one · 2019Article
- Reduced adiposity attenuates FGF21 mediated metabolic improvements in the Siberian hamster.Scientific reports · 2017Article
- Hypothalamic over-expression of VGF in the Siberian hamster increases energy expenditure and reduces body weight gain.PloS one · 2017Article
- Beyond Emotional and Spatial Processes: Cognitive Dysfunction in a Depressive Phenotype Produced by Long Photoperiod Exposure.PloS one · 2017Article
- Photoperiod induced obesity in the Brandt's vole (Lasiopodomys brandtii): a model of 'healthy obesity'?Disease models & mechanisms · 2016Article
- Circadian Disruption Alters the Effects of Lipopolysaccharide Treatment on Circadian and Ultradian Locomotor Activity and Body Temperature Rhythms of Female Siberian Hamsters.Journal of biological rhythms · 2015Article
- Pregnancy-induced changes in ultradian rhythms persist in circadian arrhythmic Siberian hamsters.Hormones and behavior · 2014Article
- Sex differences in Siberian hamster ultradian locomotor rhythms.Physiology & behavior · 2013Article
- Pineal and gonadal influences on ultradian locomotor rhythms of male Siberian hamsters.Hormones and behavior · 2013Article
- Photoperiodic changes in endocannabinoid levels and energetic responses to altered signalling at CB1 receptors in Siberian hamsters.Journal of neuroendocrinology · 2012Article
- Histaminergic regulation of seasonal metabolic rhythms in Siberian hamsters.Physiology & behavior · 2011Article
Corrections and comments
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Authors and funding
6 authors.
Funding
Abstract
The objective of this study was to determine whether the previously observed effects of photoperiod on body weight in Siberian hamsters were due to changes in the daily patterns of locomotor activity, energy expenditure, and/or feeding behavior. Adult males were monitored through a seasonal cycle using an automated comprehensive laboratory animal monitoring system (CLAMS). Exposure to a short-day photoperiod (SD; 8:16-h light-dark cycle) induced a significant decline in body weight, and oxygen consumption (Vo(2)), carbon dioxide production (Vco(2)), and heat production all decreased reaching a nadir by 16 wk of SD. Clear daily rhythms in locomotor activity, Vo(2), and Vco(2) were observed at the start of the study, but these all progressively diminished after prolonged exposure to SD. Rhythms in feeding behavior were also detected initially, reflecting an increase in meal frequency but not duration during the dark phase. This rhythm was lost by 8 wk of SD exposure such that food intake was relatively constant across dark and light phases. After 18 wk in SD, hamsters were transferred to a long-day photoperiod (LD; 16:8-h light-dark cycle), which induced significant weight gain. This was associated with an increase in energy intake within 2 wk, while Vo(2), Vco(2), and heat production all increased back to basal levels. Rhythmicity was reestablished within 4 wk of reexposure to long days. These results demonstrate that photoperiod impacts on body weight via complex changes in locomotor activity, energy expenditure, and feeding behavior, with a striking loss of daily rhythms during SD exposure.
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