DISPERSAL AND ENDEMICITY IN GAMMARIDEAN AMPHIPODA

The importance of drift algae and of hard substrata, such as pumice an d logs, in the dispersal of gammaridean amphipods is discussed. Differ ent degrees of endemicity between amphipods with potentially efficient powers of dispersal and those with potentially poor powers of dispers al are demonstrated. The endemic amphipods of Hawaii exhibit different biogeographic relationships from the non-endemic species. This is pro bably a result of different biogeographic processes operating on diffe rent time scales.