Circadian rhythms in locomotor activity of juvenile horseshoe crabs.

@article{Borst2002CircadianRI,
  title={Circadian rhythms in locomotor activity of juvenile horseshoe crabs.},
  author={Douglas Borst and Robert Barlow},
  journal={The Biological bulletin},
  year={2002},
  volume={203 2},
  pages={227-8}
}
The American horseshoe crab, Limulus polyphemus, is a classic model for vision research. Not only are the lateral eyes of Limulus relatively simple, but they share many processes with the eyes of more advanced animals, including humans (1). The eyes of Limulus also exhibit a remarkable circadian rhythm: they become nearly 1,000,000-fold more sensitive at night, accommodating for the roughly 1,000,000-fold decrease in ambient light (2). Is visual sensitivity the only process controlled by a… CONTINUE READING