THE FRESH-WATER MICROCRUSTACEA OF EASTER ISLAND

The 'Cladocera', Copepod and Ostracod fauna of Easter Island amounts t o only five species. Three of these are wide-ranging, and four are cyc lic parthenogens or at least capable of parthenogenesis. Two, the Clad oceran Alona weinecki and the Ostracod Sarscypridopsis sp., are more i nteresting from a biogeographic point of view, because restricted (apa rt from Easter Island) to the subantarctic. It is argued that this is strong evidence of their introduction by man, not by 'natural' passive dispersal.