Circadian organization of the diurnal Caviomorph rodent,Octodon degus
Abstract
The Octodon degus, or degu, is an excellent animal model for studying the theoretical and neural underpinnings of diurnality. The power of this model comes from their unique evolutionary lineage, long lives, and relative ease of care in the laboratory for a non-domesticated species. We have summarized the field and laboratory data indicating the critical variables that influence the degus' phase preference and the possible mechanisms for the phase flexibility observed in the field and laboratory. We also review studies examining the physiology and anatomy of light and non-photic inputs to the degu circadian system and studies of the circadian pacemaker itself, with particular emphasis placed on characteristics that appear to be convergent adaptations to a diurnal niche. Finally, we begin to seek the origin for the diurnally-phased activity output of the degu, although we conclude that significant work remains to be done.
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“Chronotype flexibility is not unique to degus, and an extensive review by Kronfeld-Schor and Dayan (2003) discusses the many ecological variables that may lead to such adaptations.”
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Baño‐Otálora, B., & Piggins, H. D. (2017) · Springer eBooks · doi:10.1007/978-81-322-3688-7_12 · Cited by 3 · see citing works
Stryjek, R., d’Isa, R., Parsons, M. H., Szymańska, K., Socha, K., Chrzanowski, M., Kurek, K., & Bębas, P. (2026) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.64898/2026.03.13.711595 · Cited by 2 · see citing works
MASKING AND ITS NEURAL SUBSTRATES IN DAY- AND NIGHT-ACTIVE MAMMALS
Langel, J. (2016) · Michigan State University Libraries · doi:10.25335/7arv-cn32
- Authors
- Hagenauer, M. H., & Lee, T. M.
- Affiliations
- University of Michigan (US)
- Corresponding author
- Lee, Theresa M.
- Venue
- Biological Rhythm Research
- Publisher
- Informa UK Limited
- Published
- 2008-06
- Volume
- 39
- Issue
- 3
- Pages
- 269-289
- ISSN
- 0929-1016 (ISSN-L)
- 1744-4179
- OpenAlex
- W2153014242
- Cited by
- 41
- References
- 74
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 2 · 2020: 1 · 2019: 1 · 2018: 3 · 2017: 1 · 2016: 4 · 2015: 2 · 2013: 6 · 2012: 3
- FWCI
- 1.77
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biological Rhythm Research (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
- Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
- Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
- Keywords
- Octodon degus, diurnal activity, circadian rhythm, circadian pacemaker, convergent evolution, activity rhythms, Caviomorpha
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