Browsing Humanities by Author "Van Aardt, W.J."
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Die effek van lood en waterkwaliteit op die biologie van die vleikurper, Tilapia Sparrmanii
Venter, Lieb Christiaan Rudolph (North-West University (South Africa), 2001)1. Handling stress increases the oxygen consumption rate (M02) of Tilapia sparrmanii by an average of27% and stabilises four hours after handling. 2. All M02 measurements were done after a ten hour rest period. 3. For ... -
A methodology for undertaking freshwater fish chemical contaminant surveys for human health risk assessment
Du Preez, Hein Hildegarde (Potchefstroom University for Christian Higher Education, 2000)In South Africa the pollution of freshwater aquatic systems can be linked to point source discharges (waste water treatment works and industrial effluents) and diffuse surface runoff (agricultural, mining and urban). As a ...