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Cobus van Dyk

Professor, Head of Department
Name: Cobus van Dyk
Location: D3 Lab 225 Auckland Park Kingsway Campus
Zoology Academic Staff听 Staff Members

Contact Details:
Tel: +27 (0)11 559 2620

Email:听cvandyk@uj.ac.za

About Cobus van Dyk

Research overview:
My research is in the field of aquatic toxicology and fish health, with a special focus on histopathology and general toxicological pathology of freshwater fish. Current projects, including those of my postgraduate students, include fish health surveys in the polluted Roodeplaat Dam system, with emphasis on hepatic pre-neoplastic lesions, as well as fish health surveys in Rietvlei Nature Reserve, investigating the reproductive health of fish.


Recently completed laboratory exposure studies by my postgraduate students include investigations on the effect of Microcystin-LR on the liver pathology of Clarias gariepinus, the effect of Cadmium on the central nervous system of Oreochromis mossambicus, and the effect of effective micro-organisms on the general histology of Clarias gariepinus.


Lecture responsibilities:

  • Physiology 2B: Control systems
  • Zoology Honours: Fish Histology and Histopathology

Recent publications:

  1. Sihoka, C., Wagenaar, G.M.,听Van Dyk, J.C.听(2024)听Metal bioaccumulation and histological alterations in听Oreochromis andersonii听at Itezhi-tezhi Dam downstream of a mining area in the Central Province of Zambia.听Environmental Toxicology and Pharmacology.听Online. Environmental Toxicology and Pharmacology.
  2. Van Dyk, J.C., Nyoni, H., Barnhoorn, I.E.J.听(2022). Hepatic nodular alterations in wild fish from a hyper-eutrophic freshwater system with cyanobacterial blooms: a species and seasonal comparison.听Environmental Science and Pollution Research. 29(11) 15729 鈥� 15742.
  3. Mabika, N., Barson, M., Dos Santos, Q.M.,听van Dyk, C.,听Avenant-Oldewage, A.听(2022). Additional Taxonomic Information for听Lamproglena hemprichii听(Copepoda: Lernaeidae) Based on Scanning Electron Microscopy and Genetic Characterization, Alongside Some Aspects of Its Ecology.听Zoological Science听40(1).
  4. Mabika, N., Barson, M.,听van Dyk, C.,听Avenant-Oldewage, A.听(2022).听Endohelminth parasites of male and female tigerfish,听Hydrocynus vittatus听(Castelnau, 1861), from the Sanyati basin in Lake Kariba.听African Zoology听57(4).
  5. Webster, H.J., Emami-Khoyi, A.,听Van Dyk, J.C.,听Teske, P.R., Jansen van Vuuren, B.听(2020). Environmental DNA Metabarcoding as a Means of Estimating Species Diversity in an Urban Aquatic Ecosystem.听Animals听10(11): 2064.
  6. Barnhoorn, I.E.J.,听van Dyk, J.C.听(2020). The first report of selected herbicides and fungicides in water and fish from a highly utilized and polluted freshwater urban impoundment.听Environmental Science and Pollution Research.听27: 33393鈥�33398.
  7. Modley, L., Rampedi, I., Avenant-Oldewage, A.,听van Dyk, J.C.听(2020). A comparative study on the biotic integrity of three rivers supplying a polluted, hyper-eutrophic freshwater system: A multi-indicator approach.听Ecological Indicators,听111: 105940.听
  8. Modley, L., Rampedi, I., Avenant-Oldewage, A., Nindi, M.M., Mhuka, V.,听van Dyk, J.C.听(2019). Microcystin concentrations and liver histopathology in听Clarias gariepinus听and听Oreochromis mossambicus听from three impacted rivers flowing into a hyper-eutrophic freshwater system.听Environmental Toxicology and Pharmacology, 71: 103222.
  9. Mabika, N., Barson, M.,听van Dyk, J.C.,听Avenant-Oldewage, A.听(2019). Seasonal occurrence of metazoan parasites in Tigerfish,听Hydrocynus vittatus听Castelnau, 1861 (Characiformes: Alestidae) from Sanyati Basin, Lake Kariba, Zimbabwe.听Onderstepoort Journal of Veterinary Research,听86(1): 1-8.听听听
  10. Lukhwareni, R.,听van Dyk, J.C.听(2018). Histology and ultrastructure of hepatic nodular alterations in听Clarias gariepinus听(Burchell).听Journal of Fish Diseases. 41(12): 1859-1870.听

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