Alison Gocke ’13



Project Title

Alien Species in South African River Systems

I assisted with the investigation of alien species invasion in the river systems of South Africa. Particularly, we looked at invasive species of catfish and tilapia that had been introduced into a dammed river system and have spread rapidly throughout the region. The research centered around the Great Fish and Sundays Rivers in South Africa, whose ecosystems have been altered due to damming in the late 1970s and early 1990s. We also investigated the feeding and reproductive cycles of an indigenous fish species that appeared to be surviving the influx of new species, in the hope of identifying beneficial survival characteristics. The research was completed under the guidance of Professor Anthony Booth in the Department of Ichthyology and Fisheries Sciences at Rhodes, as well as Wilbert Kadye, a Ph.D. student under Professor Booth.

Internship Year


Project Category



Rhodes University


Daniel Rubenstein, Class of 1877 Professor of Zoology. Professor of Ecology and Evolutionary Biology. Director, Program in African Studies. Chair, Department of Ecology and Evolutionary Biology