Semilunar rhythm in the zoea-release activity of the land crabs Sesarma

@article{Saigusa1978SemilunarRI,
  title={Semilunar rhythm in the zoea-release activity of the land crabs Sesarma},
  author={Masayuki Saigusa and Toshitaka Hidaka},
  journal={Oecologia},
  year={1978},
  volume={37},
  pages={163-176}
}
The number of the land crabs Sesarma which released zoeae in a river was counted and recorded for 2 years. The number of crabs releasing zoeae reached a maximum at around every syzygy and decreased to a minimum at around every half moon, showing a semilunar rhythm (Fig. 2). This semilunar rhythm, when examined temporally, showed a peculiar pattern accurately synchronized with the lunar cycle. On the day of and during 4–5 days prior to the syzygy, the peak of zoea-release activity came just… CONTINUE READING