Journal of the Marine Biological Association of the United Kingdom

Research Article

The seasonal abundance of four species of Stauromedusae (Coelenterata: Scyphomedusae) at Plymouth

P. G. Corbina1

a1 The Laboratory, Marine Biological Association, Citadel Hill, Plymouth

Annual population changes of four species of Stauromedusae at Plymouth are described. Three of these, Haliclystus auricula, Lucernariopsis campanulata and L. cruxmelitensis, have one generation in a year; Craterolophus convolvulus has two. The completion of the life-cycle of the four Plymouth species within a year is in agreement with Berril's (1962) studies of three species on the west Atlantic coast and with a reinterpretation of Sars's (1846) observations on Lucernaria quadricomis on the coast of Norway.