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4. Persistent organic pollutants in the Olifants River Basin, South Africa: Bioaccumulation and trophic transfer through a subtropical aquatic food web

Author

Verhaert, Vera, primary, Newmark, Nadine, additional, D'Hollander, Wendy, additional, Covaci, Adrian, additional, Vlok, Wynand, additional, Wepener, Victor, additional, Addo-Bediako, Abraham, additional, Jooste, Antoinette, additional, Teuchies, Johannes, additional, Blust, Ronny, additional, and Bervoets, Lieven, additional

Published
2017
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10. Are catfish from metal-polluted impoundments in the Olifants River, South Africa, safe for human consumption?

Author

M Marr, Sean, Jooste, Antoinette, Addo-Bediako, Abraham, and J Luus-Powell, Wilmien

Abstract

AbstractMany impoverished rural communities rely on fish from inland waters for dietary protein; however, inland waters are becoming increasingly contaminated due to anthropogenic activities. The Olifants River is one of the most polluted river in South Africa. The upper catchment is characterized by acid mine drainage and elevated levels of contaminants from domestic, agricultural, industrial, and mining effluents. A human health risk assessment was conducted to determine whether 2 catfish species from 2 impoundments in the Olifants River were safe for human consumption. The concentrations of metal in the fish muscle were in most cases higher at Lake Flag Boshielo than at the downstream Phalaborwa Barrage. Consumption of catfish from Lake Flag Boshielo on a weekly basis could result in adverse health impacts from antimony, chromium, cobalt, and lead. For the Phalaborwa Barrage, only lead would be likely to pose a health risk for consumption of catfish at weekly frequency.

Published
2015
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12. Tomid parasites in fish in the Olifants and Comati River Systems, South Africa.

Author

Luus-Powell WJ, Jooste A, and Junker K

Subjects
Animals, Arthropods growth & development, Female, Fishes, Fresh Water, Host-Parasite Interactions, Male, Prevalence, Sentinel Surveillance veterinary, South Africa epidemiology, Species Specificity, Air Sacs parasitology, Arthropods physiology, Fish Diseases epidemiology, Fish Diseases parasitology, Parasitic Diseases, Animal epidemiology, Parasitic Diseases, Animal parasitology
Abstract

During parasitological field surveys of freshwater fish, sebekiid and subtriquetrid pentastome larvae were recovered from the body cavity or swim bladder of several fish species from various localities in Limpopo and Mpumalanga Provinces, South Africa. Sebekia wedli was recovered from the body cavity of Marcusenius macrolepidotus (Mormyridae) from Flag Boshielo Dam, Limpopo Province, and Alofia sp. and Subtriquetra rileyi were found in the swim bladder of Oreochromis mossambicus (Cichlidae) from the Phalaborwa Barrage, Limpopo Province. The latter species was also collected from the swim bladder of O. mossambicus in dams in the Phalaborwa region and the Ga-Selati River, Limpopo Province. A single specimen of Sebekia okavangoensis was present in the body cavity of Clarias gariepinus (Clariidae) in a dam on a sugarcane farm in the Komatipoort region, Mpumalanga Province. Pentastomid infections in the Mormyridae and Clariidae represent new host records.

Published
2008
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