circadian

Tag archives for circadian

The metabolism of most animals follows a circadian rhythm that differs between the day and night. Mexican cavefish living in constant darkness, lost this circadian rhythm some time ago. In a newly published study in PLOS ONE, researchers compared the metabolic rate of both cave- and surface-dwelling Mexican tetra fish (Astyanax mexicanus). They hypothesized that…

City birds are early to rise

A recent study has provided some evidence supporting the hypothesis that light and noise pollution alters the biological clocks of birds living in cities (compared to birds living in rural areas).   Dr. Dominoni (Max Planck Institute for Ornithology, Germany) and colleagues used radio-pulse transmitters attached to European blackbirds (Turdus merula) living in Munich, Germany…