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Impacts of mine dump pollution on plant species diversity, composition and structure of a semiarid savanna in Namibia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: I Mapaure --- Department of Biological Sciences, Namibia PM Chimwamurombe --- Department of Biological Sciences, Namibia BS Mapani --- Department of Geology, Namibia FA Kamona --- Department of Geology, NamibiaEffects of mine dump pollution on semiarid savanna vegetation were investigated in Kombat, Namibia. Vegetation structure, species richness, composition and diversity were compared between polluted and control sites. Concentrations of arsenic, chromium, copper, lead and zinc in soils were significantly... -
Aftermath of simultaneous toxic spills in the Klein Nyl River, Northern Province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Jooste L PollingIn late August 1998, a mechanical malfunction at the Nylstroom Sewage Treatment Works resulted in a massive quantity of untreated sewage flowing into the Klein Nyl River. Simultaneously, 5km upstream, a poly-aromatic hydrocarbon poison was simultaneously leaked into the same... -
Hydraulic loading, stability and water quality of Nakivubo wetland, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J Kyambadde F Kansiime L Gumaelius G DalhammarNakivubo wetland, which has performed tertiary water treatment for Kampala city for the past 40 years, is ecologically stressed by agricultural and infrastructural developments. Field studies were carried out to assess the hydraulic loading, pollution profile, stability and water quality... -
The sublethal effects of copper and lead on the haematology and acid-base balance of the groovy mullet, Liza dumerili
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HM Mzimela --- Coastal Research Unit of Zululand, Department of Zoology, South Africa V Wepener --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaToxicity bioassays were conducted on groovy mullet, Liza dumerili, using copper and lead, in order to assess how these metals affected their blood haematology and acid-base balance. Short-term (96 hours) exposure to lead caused significantly more haematological response [PCO2] than... -
The pollution status of Lake Nakuru, Kenya: heavy metals and pesticide residues, 1999/2000
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: WJ Mavura --- Department of Chemistry, Kenya PT Wangila --- Department of Chemistry, KenyaThis study was carried out from April 1999 to May 2000 to investigate the extent of pollution of Lake Nakuru. Water, sediment, fish and algae collected from the lake and its feeder rivers during the dry and rainy seasons were... -
Heavy metal and faecal bacterial contamination of urban lakes in Yaoundé, Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J Demanou --- Laboratory of General Biology, Cameroon RE Brummett --- , CameroonConcentrations of faecal bacteria and heavy metals (Cr, Cd, Hg, Pb and Zn) were measured in fish, mud and water from two urban lakes in Yaoundé, Cameroon. The mean densities of faecal coliforms (FC) and faecal streptococ ci (FS) in... -
Assessment of heavy metal accumulation in Anzali wetland, Iran, using a submerged aquatic plant, Ceratophyllum demersum
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AR Pourkhabbaz --- Department of Environmental Sciences, Faculty of Agriculture, Iran HR Pourkhabbaz --- Department of Environment, Faculty of Natural Resources, Iran T Khazaei --- Department of Environmental Sciences, Faculty of Agriculture, Iran S Behravesh --- Department of Environmental Sciences, Faculty of Agriculture, Iran M Ebrahimpour --- Department of Environmental Sciences, Faculty of Agriculture, IranThe objective of this study in 2009 was to examine whether levels of cadmium (Cd), copper (Cu), zinc (Zn), lead (Pb) and chromium (Cr) were higher in the leaves than in the stems of a submerged aquatic plant Ceratophyllum demersum... -
Evaluation of the fish health assessment index in the Olifants River system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RM Watson --- Department of Zoology, South Africa D Crafford --- Department of Zoology, South Africa A Avenant-Oldewage --- Department of Zoology, South AfricaThe fish health assessment index (HAI) biomonitoring technique, developed in the USA and subsequently tested in South Africa, was re-evaluated in the Olifants River system using Clarias gariepinus, Oreochromis mossambicus and Labeobarbus marequensis during drought and flood conditions in 1994–1997... -
Trace metal effects on the production of biotoxins by microalgae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Rhodes A Selwood P McNabb L Briggs J Adamson R van Ginkel O LaczkaMass production of bioactive compounds was enhanced by the addition of particular trace metals to specific microalgae. An increase in domoic acid isomer-C production by Pseudo-nitzschia australis was achieved by adding copper (Cu) or Zinc (0.1–0.2μmol l−1) to standard growth... -
Trace metal contamination of water at a solid waste disposal site at Kariba, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PortiaC ChifambaTrace metal concentrations were determined in soil samples collected from within, and close to, a solid waste disposal site at Kariba, Zimbabwe, and in water flowing from the area during 1996 and 1997. Soil samples were collected from the surface... -
Heavy metal pollution levels in water and oysters, Saccostrea cucullata, from Mzinga Creek and Ras Dege mangrove ecosystems, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Augustina Mtanga JohnF MachiwaHeavy metal (cadmium, chromium, copper, mercury, lead and zinc) concentrations in mangrove forests were investigated in water, suspended particulate matter (SPM) and oyster samples from the Mzinga Creek and Ras Dege mangrove stands, Tanzania, using Inductively Coupled Plasma–Atomic Emission Spectroscopy... -
Heavy metals in the water and sediments of Oued Es-Souk, Algeria, a river receiving acid effluents from an abandoned mine
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Chahrazed BoukhalfaThe Sidi Kamber Mine, abandoned since 1976, is still a source of acidic drainage entering the Oued Es-Souk River. An investigation of the rate of pollution of the Oued Es-Souk and the variation of its water quality showed that the... -
Bioaccumulation of platinum group metals in dolphins, Stenella sp., caught off Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DK EssumangPlatinum group metals (PGMs) concentrations were measured in the tissues= of dolphins (Stenella sp.) caught along the Ghanaian coastline. Tissues from specimens caught by fishermen from Dixcove, western Ghana, were analysed in 2006 for palladium (Pd), platinum (Pt) and rhodium... -
Do heavy metals counter the potential health benefits of wine?
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AD Marais --- Division of Lipidology, Department of Internal Medicine, DM Blackhurst --- Division of Lipidology, Department of Internal Medicine, -
Effects of irrigation water quality on vegetables Part 2: Chemical and nutritional content
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Loyiso L Mzini --- Döhne Agricultural Development Institute, South Africa Kevin Winter --- Department of Environmental and Geographical Sciences, South AfricaThe internal qualities of edible vegetable crops have not been widely researched in South Africa. The aim of this study was to determine possible accumulation of nutrients and heavy metals within these crops after being irrigated with greywater (generated from... -
Cellular responses of the starfish Parvalustra exigua to metal pollution in False Bay, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Sophié A. Reinecke --- Department of Botany and Zoology, South Africa Adriaan J. Reinecke --- Department of Botany and Zoology, South AfricaThe cushion sea star Parvalustra exigua from five sites along the shore of False Bay on the southern coast of South Africa was studied using two cellular biomarkers, the neutral red retention assay (NRR) and the lysosomal destabilization assay (DI)... -
Lead accumulation in and its haematological effects on African catfish Clarias gariepinus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DH Ogbuagu --- Department of Environmental Technology, Nigeria ET Adebayo --- Department of Fisheries and Aquaculture Technology, Nigeria AA Ayoade --- Hydrobiology and Fisheries Unit, Department of Zoology, Nigeria OB Ugwu --- Department of Fisheries and Aquaculture Technology, Nigeria DO Mba --- Department of Fisheries and Aquaculture Technology, NigeriaYoung adult Clarias gariepinus exposed to 0.0015–0.1500 µg l−1 concentrations of lead (Pb2+) ions for 30 days were investigated for accumulations in muscle, gill, liver and heart tissues, as well as for the metal's effects on haemoglobin concentrations, erythrocytes sedimentation... -
Xenopus laevis embryos and tadpoles as models for testing for pollution by zinc, copper, lead and cadmium
Item type: Journal Article • Journal: African Zoology • Authors: Lorren K. Haywood --- Ecophysiological Studies Research Group, School of Animal, South Africa Graham J. Alexander --- Ecophysiological Studies Research Group, School of Animal, South Africa Marcus J. Byrne --- Ecophysiological Studies Research Group, School of Animal, South Africa Ewa Cukrowska --- School of Chemistry, South AfricaThe toxicity of bio available Zn, Cu, Pb, and Cd on the life stages of Xenopus laevis embryos and tadpoles was investigated. Cu and Cd were found to affect the hatching success of the embryos, with a strong negative relationship... -
Metal enrichment in water and fish in a semi-urban Nigerian lake, and their associated risks
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CD Ezeonyejiaku --- Department of Zoology, Nigeria MO Obiakor --- School of Environmental and Rural Science, AustraliaTrace metal (Zn, Pb, Cu, Cr and Cd) concentrations in the water column and in the liver, muscle and gill tissues of Parachanna obscura and Clarias gariepinus in Agulu Lake, Nigeria, were investigated in June 2014 and compared with WHO... -
Possibilities of Russian hi-tech rare earth products to meet industrial needs of BRICS countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: N. Yu. Samsonov --- Institute of Economics and Industrial Engineering SB RAS, Russia A. V. Tolstov --- Institute of Geology and Mineralogy SB RAS, Russia N. P. Pokhilenko --- Institute of Geology and Mineralogy SB RAS, (Academician of Russian Academy of Science), Russia V. A. Krykov --- Institute of Economics and Industrial Engineering SB RAS, Russia S. R. Khalimova --- Institute of Economics and Industrial Engineering SB RAS, RussiaThe prospects of the creation in Russia of a new scientific and technological sector of production from rare earth materials from the unique niobium rare earth Tomtor deposit (Russia, Yakutia) are discussed in this article. The authors show that an... -
Spatio-seasonal dynamics of bacteria and metal composition of a platinum mine tailings dam, Rustenburg, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Molemi E Rauwane --- Agricultural Research Council–Biotechnology Platform, South Africa Laurette M Marais --- Department of Biotechnology, Faculty of Applied and Computer Sciences, Vanderbijlpark Campus, South Africa Oluwatosin G Oladipo --- Unit for Environmental Sciences and Management, South Africa Cornelius C Bezuidenhout --- Unit for Environmental Sciences and Management, South Africa Mark S Maboeta --- Unit for Environmental Sciences and Management, South AfricaSeasonal variations and proximity to polluted sites, among other factors, play a vital role in soil composition. The impact of spatio-seasonal changes on bacterial and heavy metal content on and around the platinum mine tailings dam, Rustenburg, South Africa, was... -
Health and chemical burdens of fish species from polluted and hyper-eutrophic freshwater ecosystems in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GM Wagenaar --- Department of Zoology, South Africa IEJ Barnhoorn --- Department of Zoology, South AfricaThree aquatic ecosystems in South Africa, the Hartbeespoort, Klipvoor and Bospoort Dams, are classified as hyper-eutrophic, because of high nutrient loads and chemical pollution. Water and two fish species, Clarias gariepinus and Cyprinus carpio, were collected from these dams to... -
Assessment of heavy metals in foods and adult dietary intake estimates
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Vincent O. Adimula --- Department of Industrial Chemistry, Nigeria Percy C. Onianwa --- Department of Chemistry, Nigeria Omolola Ilupeju --- Department of Chemistry, Nigeria Eric Ayom --- Department of Chemistry, Nigeria Alafara A. Baba --- Department of Industrial Chemistry, NigeriaLevels of some heavy metals were investigated in 114 snack samples consumed in Ibadan city, Nigeria. The concentrations of the selected metals were observed to range widely in the sampled food snacks: cadmium (0.004 to 0.892 mg/kg), cobalt (0.090 to 0.797 mg/kg),... -
The effects of different gold mine tailings on growth, reproduction and avoidance-behaviour of earthworms
Item type: Journal Article • Journal: African Zoology • Authors: Bryan McGuirk --- Unit for Environmental Sciences and Management, South Africa Pieter Theron --- Unit for Environmental Sciences and Management, South Africa Mark Maboeta --- Unit for Environmental Sciences and Management, South AfricaThe mining industry plays a key role in the economic development of South Africa as one of the largest exporters of valuable resources, such as gold, platinum group metals and other metals and minerals. Unfortunately, mining produces large volumes of... -
Growth and metabolism of Clarias gariepinus (Burchell, 1822) fed with copepods (Eucyclops sp.) exposed to lead and titanium dioxide nanoparticles
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MM Matouke --- , Nigeria MK Mustapha --- , NigeriaThe increasing uses of lead (Pb2+) and titanium dioxide nanoparticles (nTiO2) in commercial products have led totheir increased discharge into aquatic environments. This study investigated the effects of the interaction betweennTiO2 and lead (Pb2+) in a simple freshwater food web... -
Cadmium and lead levels in three freshwater fish species from the Zambezi region, Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: O Madzingira --- , Namibia LZ Lifumbela --- , Namibia E Kandiwa --- , Namibia L Kandjengo --- , Namibia B Mushonga --- , NamibiaMuscle tissue from three-spotted tilapia (Oreochromis andersonii) (n = 11), sharp tooth catfish (Clarias gariepinus) (n = 14) and tigerfish (Hydrocynus vittatus) (n = 12) were sampled from a market in the Zambezi region, Namibia in June 2018 and analysed... -
Assessment of river health using benthic macroinvertebrates in the Dwars River, Olifants Water Management Area, Limpopo province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TV Mmako --- , South Africa A Addo-Bediako --- , South Africa WJ Luus-Powell --- , South Africa M Kekana --- , South AfricaThe study assessed the impact of water and sediment quality on benthic macroinvertebrate assemblages in the Dwars River, a tributary of the Olifants River, Limpopo province, South Africa. Physico-chemical variables, heavy metals and macroinvertebrates were collected using standard methods. A... -
Is the rand a commodity currency? A volatility spillover analysis
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Ayesha Sayed --- , South Africa Ailie Charteris --- , South AfricaSouth Africa is a major commodity exporter, yet it is not clear what impact volatility in commodity prices has on the volatility of its currency. In this study, we examine whether a comprehensive sample of commodities (metals, grains and energy)... -
An assessment of water and sediment quality of aquatic ecosystems within South Africa’s largest floodplain
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D van Rooyen --- , South Africa R Gerber --- , South Africa NJ Smit --- , South Africa V Wepener --- , South AfricaNdumo Game Reserve (NGR), a Ramsar site, situated in South Africa’s largest floodplain (Phongolo River floodplain) in northern KwaZulu-Natal, with important aquatic ecosystems: the Usuthu and Phongolo rivers and their associated floodplain lakes. While the Phongolo River is regulated, the... -
Southern mullets (Chelon richardsonii) as a potential biological indicator for mercury pollution in the Walvis Bay lagoon, Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Veronica Kaleinasho Kapula --- University of Namibia, Namibia Hilkka Opolili Ndahafa Ndjaula --- University of Namibia, Namibia Stephanus Hamutenya --- , Namibia Johannes Angala Iitembu --- University of Namibia, NamibiaSouthern mullet Chelon richardsonii is one of the important fish species found in the Walvis Bay lagoon (WBL) that is commercially exploited for local consumption. The southern mullet is, however, exposed to mercury (Hg) found in sediments, which forms part... -
Assessment of water quality for suitability and human health risk: a study of the Owan River, Edo State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Nkonyeasua Kingsley Egun --- University of Benin, Nigeria Ijeoma Patience Oboh --- University of Benin, NigeriaSuitability assessment of water bodies for human consumption and its implication on human health is critical to water resources utilisation and sustainable development. This study investigated the water quality of the Owan River and the potential health risk to users... -
Assessment of water quality and associated human health risk of a tropical freshwater body in Edo State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Ekene Biose --- University of Benin, Nigeria Nkonyeasua Kingsley Egun --- University of Benin, Nigeria Nkolika Uzoh --- University of Benin, Nigeria Michael Osasele Omoigberale --- University of Benin, NigeriaThe quality of freshwater sources is a key factor in sustainable development. This study investigated the water quality suitability of Ossiomo River for human consumption and the implications for public health. Water samples were collected and analysed from October 2021... -
Occurrence of contaminants of emerging concern in the uMhlathuze and uThukela river systems, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LR Nsibande --- University of Zululand, South Africa RF Lehutso --- Water Centre, Council for Scientific and Industrial Research, South Africa M Thwala --- Academy of Science of South Africa, South Africa HMM Mzimela --- University of Zululand, South Africa M Seopela --- University of Johannesburg, South Africa NF Masikane --- University of Zululand, South AfricaContaminants of emerging concern (CECs), which include inorganic substances, exhibit potential adverse effects on aquatic life even though they commonly occur at very low concentrations in aquatic resources. The lack of data available about the risk of CECs to the... -
Volatility and return spillovers between private equity buyout, venture capital and major financial markets
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Korhan K. Gokmenoglu --- Ankara HBV University, Turkey Efe Altingunes --- Department of Banking and Finance, Eastern Mediterranean University, CyprusThis study investigates the volatility and return spillovers between Private Equity Buyouts (PE) and Venture Capital (VC), the equity market, precious metals, real estate, and the Dollar index, which has been widely ignored in the literature. We analysed daily data... -
Evaluating the histopathology, condition index and stress-on-stress response of caged brown mussels Perna perna for monitoring marine coastal pollution in Senegal
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Tabane --- Centre Régional de Recherche en Écotoxicologie et Sécurité Environnementale (CERES-Locustox), Unité Biologie, Senegal F Cazier --- Centre Commun de Mesures, Université du Littoral Côte d’Opale, France D Dewaélé --- Centre Commun de Mesures, Université du Littoral Côte d’Opale, France K Hylland --- University of Oslo, Norway CT Ba --- Université Cheikh Anta Diop, Senegal M Fall --- Université Cheikh Anta Diop, SenegalThis study is the first in a coastal West African country to evaluate the histopathology, condition index and stress-on-stress response time of caged brown mussels Perna perna for use in pollution monitoring of coastal ecosystems. Perna perna collected from an...