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2. 2001. Selected enzymes and heat shock protein 70 as biomarkers of pollution in the reproductive organs of freshwater fish [PhD thesis]. Auckland Park, South Africa: Rand Afrikaans University.
3. 2003. Intersex in feral sharptooth catfish (Clarias gariepinus). Poster presented at the 38th South African Society of Aquatic Scientists (SASAqS) annual congress held in conjunction with ZSSA (Zoological Society of South Africa), University of Cape Town, Cape Town, South Africa.
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