Peces Eléctricos

Animal Models

As a basal group within vertebrates, fishes are excellent models to explore how environmental and social cues interact in the modulation of biological rhythms.

We study circadian and seasonal rhythms in two fish models whose life histories imply different challenges to their biological clocks. The weakly electric fish, Gymnotus omarorum, exhibits daily rhythms of locomotor activity and electrical behavior in constant darkness in the wild. The annual fish, Austrolebias reicherti, lives in an extremely dynamic environment with high seasonal variations in luminosity, temperature, conductivity, and turbidity.