Articles by Keyword: Aquatic Avifauna

Search results for Aquatic Avifauna

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  1. A REVIEW OF THE AQUATIC AVIFAUNA OF THE MHLATHUZE ESTUARY

    A REVIEW OF THE AQUATIC AVIFAUNA OF THE MHLATHUZE ESTUARY

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    This paper is the first published review of the aquatic avifauna of the Mhlathuze Estuary. It also uses a regional approach in order to determine the potential for certain hitherto unrecorded species to occur there. The study shows that there...
  2. Aquatic avifauna of the coastal lakes of the Mhlathuze River system

    Aquatic avifauna of the coastal lakes of the Mhlathuze River system

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    This paper provides the first attempt to bring together all published and unpublished data on the aquatic avifauna of Lakes Mzingazi, Nsezi, Cubhu and Mangeza, situated near Richards Bay in the lower reaches of the Mhlathuze River system. Whilst the...
  3. AQUATIC MACROPHYTE COMMUNITIES OF THE WILDERNESS LAKES: COMMUNITY STRUCTURE AND ASSOCIATED ENVIRONMENTAL CONDITIONS

    AQUATIC MACROPHYTE COMMUNITIES OF THE WILDERNESS LAKES: COMMUNITY STRUCTURE AND ASSOCIATED ENVIRONMENTAL CONDITIONS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The structure and summer biomass (g m−2 dry mass) of the principal aquatic macrophyte communities of the Wilderness Lakes were measured. Both emergent and submerged communities were included in the study. Productivity estimates were made by multiplying biomass by production/biomass...
  4. THE ENUMERATION OF AQUATIC BACTERIA USING DAPI

    THE ENUMERATION OF AQUATIC BACTERIA USING DAPI

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    A comparison was made between acridine orange (AO) and 4'6-diamidino-2-phenylindole (DAPI), a highly sensitive DNA fluorescing stain, for enumerating aquatic bacteria. When water samples were processed in a darkened room and a final DAPI concentration of 0,05 μg ml −1...
  5. ZOOPLANKTON AND ESTUARINE RELICT (BENTHIC) FAUNA IN LAKE MZINGAZI, A FRESHWATER COASTAL LAKE OF NATAL

    ZOOPLANKTON AND ESTUARINE RELICT (BENTHIC) FAUNA IN LAKE MZINGAZI, A FRESHWATER COASTAL LAKE OF NATAL

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Lake Mzingazi, a natural, undisturbed freshwater coastal lake in the heart of the Richards Bay municipal area, is threatened by rapid urban and industrial growth. The previously unrecorded composition and distribution of zooplankton in the lake was studied during 1979...
  6. SHORT-TERM IMPACTS OF FORMULATIONS OF <em>BACILLUS THURINGIENSIS</em> VAR. <em>ISRAELENSIS</em> DE BARJAC AND THE ORGANOPHOSPHATE TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON RHEOPHILIC BENTHIC MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA

    SHORT-TERM IMPACTS OF FORMULATIONS OF <em>BACILLUS THURINGIENSIS</em> VAR. <em>ISRAELENSIS</em> DE BARJAC AND THE ORGANOPHOSPHATE TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON RHEOPHILIC BENTHIC MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The impacts of larvicides used in the control of blackflies (Diptera: Simuliidae) on macroinvertebrates in the stones-in-current biotope were assessed during 8 field trials in the middle Orange River, South Africa. Two Bacillus thuringiensis var. israelensis (B.t.i.) products (VectobacR 12AS...
  7. COASTAL AQUATIC ECOSYSTEMS, CONSERVATION AND MANAGEMENT STRATEGIES IN NIGERIA

    COASTAL AQUATIC ECOSYSTEMS, CONSERVATION AND MANAGEMENT STRATEGIES IN NIGERIA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The coastal ecosystems in Nigeria are classified into four broad regions according to differences in general morphology, vegetation and beach type. They are the barrier lagoon complex, the transgressive mud beach, the Niger delta and the strand coast. The delta...
  8. DETRIMENTAL EFFECTS OF FENTHION (QUELETOX® UL), USED TO CONTROL RED-BILLED QUELEA (<em>QUELEA QUELEA</em>), ON RHEOPHILIC BENTHIC MACROINVERTEBRATES IN THE ORANGE RIVER

    DETRIMENTAL EFFECTS OF FENTHION (QUELETOX® UL), USED TO CONTROL RED-BILLED QUELEA (<em>QUELEA QUELEA</em>), ON RHEOPHILIC BENTHIC MACROINVERTEBRATES IN THE ORANGE RIVER

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The relative abundance of rheophilic macroinvertebrates in the Orange River was assessed before and 15 hrs after two aerial applications of fenthion (QUELETOX® UL) above roosting sites of the red-billed quelea (Quelea quelea). The first treatment had no detectable effect...
  9. THE USE OF TOXICITY TESTING IN EFFLUENT REGULATION AND CONTROL: A NEW DIMENSION TO ASSESSMENT AND MANAGEMENT OF WATER QUALITY IN SOUTH AFRICA

    THE USE OF TOXICITY TESTING IN EFFLUENT REGULATION AND CONTROL: A NEW DIMENSION TO ASSESSMENT AND MANAGEMENT OF WATER QUALITY IN SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Efficient management tools are continually required to cope with increasing demands placed on the quality and quantity of aquatic resources. Recent developments in environmental monitoring indicate the importance of incorporating biological indicators in assessment programmes. Aquatic toxicology has consequently become...
  10. IMPACTS OF REPEATED APPLICATIONS OF <em>BACILLUS THURINGIENSIS</em> VAR. <em>ISRAELENSIS</em> DE BARJAC AND TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA

    IMPACTS OF REPEATED APPLICATIONS OF <em>BACILLUS THURINGIENSIS</em> VAR. <em>ISRAELENSIS</em> DE BARJAC AND TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The impacts of five consecutive treatments of blackfly larvicides on macroinvertebrates in the middle Orange River were assessed. The abundance of the midge Xenochironomus sp. and the limpet Burnupia sp. was lower at sites treated with Bacillus thuringiensis var. israelensis...