A stable isotopic study of the diet of Potamonautes sidneyi (Brachyura: Potamonautidae) in two coastal lakes of the iSimangaliso Wetland Park, South Africa A stable isotopic study of the diet of Potamonautes sidneyi (Brachyura: Potamonautidae) in two coastal lakes of the iSimangaliso Wetland Park, South Africa Posted in .