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COMPARISON OF FISH GONADS AND FISH MEAL AS MAJOR COMPONENTS IN THE DIETS OF YOUNG AFRICAN SHARPTOOTH CATFISH, CLARIAS GARIEPINUS (BURCHELL)
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: L.C. Hoffman --- Aquaculture Research Unit, South Africa J.F. Prinsloo --- Aquaculture Research Unit, South Africa J. Theron --- Aquaculture Research Unit, South AfricaThe replacement of fish-meal (two sources, arbitrarily designated FMA and FMB), with either freeze dried (GVD) or oven dried (GOD) gonads of Clarias gariepinus in a starter diet for larvae of this species, was tested. No significant difference in larval... -
Gill damage, metallothionein gene expression and metal accumulation in Tilapia sparrmanii from selected field sites at Rustenburg and Potchefstroom, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Daléne van Heerden Peet Jansen van Rensburg Mikko Nikinmaa André VoslooFish were collected from field sites in the mining and agricultural areas of Potchefstroom and Rustenburg, North-West Province, South Africa. Water and sediment samples from each site, together with fish muscle and gills, were analysed by Inductively Coupled Plasma Mass... -
The role of ornamental goldfish Carassius auratus in transfer of some viruses and ectoparasites to cultured fish in Egypt: comparative ultra-pathological studies
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MA Mahmoud --- Department of Pathology, Faculty of Veterinary Medicine, Egypt SM Aly --- , Egypt AS Diab --- , Egypt G. John --- Department of Biotechnology, IndiaGoldfish, common carp and Nile tilapia were sampled between September 2002 and May 2003 to investigate lesions induced by viral diseases and ectoparasites. Goldfish exhibited neoplasms, Dermocystidium sp., Ichthyophthirius multifiliis (Ich), Trichodina reticulata, Lernaea cyprinacea and systemic infections. Neoplastic and... -
Evaluation of kikuyu grass and moringa leaves as protein sources in Oreochromis mossambicus diets
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SN Hlophe --- Aquaculture Research Unit, School of Agricultural and Environmental Sciences, South Africa NAG Moyo --- Aquaculture Research Unit, School of Agricultural and Environmental Sciences, South AfricaThe ability to utilise leaf meal-based diets by Oreochromis mossambicus of 12.5 g (SD 1) was evaluated. Nine diets of 30% crude protein and 20 MJ gross energy kg–1 dry matter were formulated, comprising eight leaf-meal diets, where kikuyu leaf... -
Efficiency of using green algae as biological controllers against toxic algal taxa in cultured Nile tilapia Oreochromis niloticus, based on histopathological examinations
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SM Aly --- Department of Pathology, Faculty of Veterinary Medicine, Egypt EM Ali --- Department of Environmental Sciences, Faculty of Sciences, Egypt AA Dessouki --- Department of Pathology, Faculty of Veterinary Medicine, Egypt AA Dawah --- Department of Limnology, EgyptThe incidence of harmful cyanobacterial blooms in surface waters has increased in frequency and outbreaks have become more severe. This research aimed at studying the effect of a culture of two green algal species as biological control of the growth... -
The histopathology of Enterogyrus coronatus Pariselle, Lambert & Euzet, 1991 (Monogenoidea) in the stomach of the southern mouthbrooder Pseudocrenilabrus philander (Weber, 1897) (Cichlidae)
Item type: Journal Article • Journal: African Zoology • Authors: Grace N Madanire-Moyo --- Department of Zoology, University of Johannesburg, South Africa Annemariè Avenant-Oldewage --- Department of Zoology, University of Johannesburg, South AfricaThe aim of this study was to describe the histopathology of the stomach of the southern mouthbrooder Pseudocrenilabrus philander (Weber, 1897) naturally infected with an endoparasitic monogenoid, Enterogyrus coronatus Pariselle, Lambert and Euzet, 1991. A total of 16 host specimens... -
Responses of the African catfish Clarias gariepinus to long-term exposure to glyphosate- and paraquat-based herbicides
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OI Ayanda --- Department of Biological Sciences, Nigeria SJ Oniye --- Department of Biological Sciences, Nigeria JA Auta --- Department of Biological Sciences, Nigeria VO Ajibola --- Department of Chemistry, Nigeria OA Bello --- Department of Biological Sciences, NigeriaDirect and indirect contamination of the aquatic environment by pesticides results in a decrease in fish productivity and may elevate concentrations of undesirable chemicals in edible fish tissues. The effects of long-term exposure of Clarias gariepinus juveniles to sublethal concentrations... -
Bilateral serous papillary cystadenofibroma of the ovaries in a young female
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: M Nisha --- Department of Pathology, India A Garima --- Department of Hematology, India S Sneh --- Department of Pathology, India R Parveen --- Department of Pathology, India -
Health assessment of freshwater fish species from Albasini Dam, outside a DDT-sprayed area in Limpopo province, South Africa: a preliminary study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: UMC Nibamureke --- Department of Zoology, South Africa IEJ Barnhoorn --- Department of Zoology, South Africa GM Wagenaar --- Department of Zoology, South AfricaDuring 2006 to 2008, the water, sediment and fish in Albasini Dam, used as a reference site outside a DDT-sprayed area, had been found to be as affected as those in the nearby DDT-sprayed area were. Accordingly, the aim of... -
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... -
Nevirapine in African surface waters induces liver histopathology in Oreochromis mossambicus: A laboratory exposure study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: UMC Nibamureke --- Department of Zoology, South Africa IEJ Barnhoorn --- Department of Zoology, South Africa GM Wagenaar --- Department of Zoology, South AfricaNevirapine (NVP) is one of the HIV antiretrovirals detected recurrently in African surface waters. Liver side effects in humans were reported. Because the effects on fish are unknown, this study investigated the potential effects of NVP on selected biometric indices... -
Histological alterations of selected tissues (gill, liver, kidney and stomach) in two common fish species within two eutrophic peri-urban lakes in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Utete --- Department of Wildlife Ecology and Conservation, Zimbabwe N Mabika --- Department of Anatomy, Zimbabwe J Chiwara --- Department of Applied Biosciences and Biotechnology, Zimbabwe J Makaure --- Department of Applied Biosciences and Biotechnology, Zimbabwe C Phiri --- Department of Freshwater and Fishery Science, Zimbabwe SS Mlambo --- Department of Biotechnology Science, Zimbabwe N Muboko --- Department of Wildlife Ecology and Conservation, Zimbabwe J Tsamba --- Department of Biology, ZimbabwePollution threatens fish health in the eutrophic lakes, Chivero and Manyame, in Zimbabwe. Histopathological tissue alterations of two commonly consumed fish: catfish, Clarias gariepinus, and; tilapia, Oreochromis niloticus, from Lakes Chivero and Manyame were assessed between 2015 and 2016. Seventy-one... -
Disease driven extinction in the wild of the Kihansi spray toad, Nectophrynoides asperginis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Ché Weldon --- Unit for Environmental Sciences and Management, North-West University, South Africa Alan Channing --- Unit for Environmental Sciences and Management, North-West University, South Africa Gerald Misinzo --- SACIDS Africa Centre of Excellence for Infectious Diseases of Humans and Animals in Eastern and Southern Africa, Sokoine University of Agriculture, Tanzania Andrew A Cunningham --- Institute of Zoology, Zoological Society of London, United KingdomThe Kihansi spray toad, Nectophrynoides asperginis, became extinct in the wild despite population monitoring and conservation management of its habitat in the Kihansi gorge, Tanzania. Previous investigations have indicated human induced habitat modification, predators, pesticides and disease as possible causes... -
Fire associated exertion myopathy as a mechanism contributing to mortality in Chamaesaura macrolepis (Cope 1862)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: PR Jordaan --- Scientific Technician, JCA Steyl --- University of Pretoria,Following a fire event, an abnormally high number of Chamaesaura macrolepis (Cope 1862) road mortalities were observed on two sections of tar road south of Maputo Special Reserve, Maputo Province, Mozambique. Although most specimens were driven over by vehicles, three... -
An enigmatic mortality event in the only population of the Critically Endangered Cameroonian frog Xenopus longipes
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: DavidC. Blackburn --- University of Kansas, USA BenJ. Evans --- McMaster University, Canada AllanP. Pessier --- San Diego Zoo's Institute for Conservation Research, USA VanceT. Vredenburg --- San Francisco State University, USAContemporary global declines and mortality events in amphibian populations have been often attributed to infectious disease and climate change, separately and in combination. We report on an enigmatic mortality event in the only known population of the Critically Endangered frog...