Wg. Dorgeloh, FOOD OVERLAP BETWEEN THE ALIEN ONCORHYNCHUS-MYKISS AND THE INDIGENOUSFISH SPECIES BARBUS-AENEUS AND CLARIAS-GARIEPINUS IN A MAN-MADE LAKE,SOUTH-AFRICA, Water S.A., 22(1), 1996, pp. 79-83
The introduction of Oncorhynchus mykiss into the Sterkfontein Dam nece
ssitated an investigation of the food overlap between this fish specie
s and the indigenous fish species The Schoener index of similarity was
used to determine possible food overlap between adult fish of three f
ish species in the Sterkfontein Dam, part of the Tugela-Vaal Water Tra
nsfer Scheme. Although the data are incomplete, indications are that t
he intra- and interspecific food overlap between adult fish of the fis
h species Oncorhynchus mykiss, Barbus aeneus and Clarias gariepinus wa
s generally large.