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Revolutionary science: an improved running wheel for hamsters
N Mrosovsky1, P A Salmon, N Vrang
1Department of Zoology, University of Toronto, Ontario, Canada.
Chronobiology International
|May 1, 1998
Summary
Golden hamsters (Mesocricetus auratus) prefer running wheels with plastic mesh floors over traditional rod floors. This surface preference also influenced their activity patterns after confinement to a new wheel.
Area of Science:
- Animal behavior
- Rodent locomotion
- Comparative psychology
Background:
- Wheel running is a common behavior in rodents.
- The physical characteristics of running wheels can influence activity levels.
- Understanding environmental enrichment preferences is crucial for animal welfare.
Purpose of the Study:
- To investigate the effect of running wheel floor texture on golden hamster activity.
- To determine if hamsters show a preference for mesh over rod floors.
- To assess the impact of wheel surface on circadian rhythm phase shifts.
Main Methods:
- Golden hamsters were tested in running wheels with either plastic mesh or rod floors.
- Activity levels were recorded in single-wheel and two-choice wheel tests.
- Circadian phase shifts were measured after a period of confinement to a novel wheel.
Main Results:
- Hamsters exhibited significantly more running activity in wheels with plastic mesh floors compared to rod floors.
- This preference was consistent in both single-choice and two-choice experimental designs.
- Phase shifts following confinement were more pronounced when the novel wheel featured a plastic mesh cover.
Conclusions:
- Golden hamsters demonstrate a clear preference for plastic mesh over rod surfaces in running wheels.
- Running wheel surface texture can influence both spontaneous activity and responses to environmental changes.
- These findings have implications for designing enriched environments for laboratory rodents.