Notes on the Life History of Gammarus chevreuxi

Abstract

The present paper is the outcome of an investigation made on a species of Gammarus inhabiting both fresh and brackish water (4, p. 657). As this species (G. zaddachi) seemed to show a marked variation in appearance according to its environment, we instituted experiments in the Laboratory at Plymouth on G. chevreuxi to see if a similar variation in appearance could be brought about by varying the degree of salinity of the water in which the animals lived.