Car, M.; Bigalke, R.D.
(Published by The Government Printer, Pretoria, 1983)
In July 1982, the invertebrate drift at Marksdrift comprised 98,7% Simulium chutteri; 0,75% Chironomidae; 0,3% Ephemeroptera; 0,15% Copepoda, and 0,1% Trichoptera. Simuliid eggs were found in only 6 out of 75 samples. A ...