The nocturnal emergence activity rhythm in the cumacean Dimorphostylis asiatica (Crustacea)

Dimorphostylis asiatica actively swims in the water at night. Males are positively phototaxic. Nearshore collections of males have demonstrated a clear rhythmic pattern, with emergence synchronized with both day-night and tidal cycles. While emergence was strongly synchronized with high tide during the winter and spring, tidal synchrony was scarcely detected in summer and autumn. -from Authors