Articles by Keyword: Lt Em Gt Oreochromis Macrochir Lt Em Gt

Search results for Lt Em Gt Oreochromis Macrochir Lt Em Gt

We found 16 results for you
  1. FIRST RECORD OF <em>OREOCHROMIS MACROCHIR</em> (BOULENGER, 1912) (PISCES:CICHLIDAE) FROM THE LIMPOPO RIVER IN SOUTHERN AFRICA.

    FIRST RECORD OF <em>OREOCHROMIS MACROCHIR</em> (BOULENGER, 1912) (PISCES:CICHLIDAE) FROM THE LIMPOPO RIVER IN SOUTHERN AFRICA.

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    During 1973/74, Barbus poechii, Oreochromis macrochir, O. andersonii, Serranochromis angusticeps, S. codringtonii, S. robustus and S. thumbergi from the Okavango System were introduced into the Shashe Dam (Limpopo System, Botswana). These species are alien to the Limpopo System. A fish...
  2. A PRELIMINARY ASSESSMENT OF THE IMPACT OF SOME ASPECTS OF THE HARTBEESPOORT DAM ENVIRONMENT ON PRODUCTION OF THE MAJOR FISH SPECIES

    A PRELIMINARY ASSESSMENT OF THE IMPACT OF SOME ASPECTS OF THE HARTBEESPOORT DAM ENVIRONMENT ON PRODUCTION OF THE MAJOR FISH SPECIES

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The dominant species of fish in Hartbeespoort Dam, in terms of mass composition of catches, are shown to be Oreochromis mossambicus (Peters), Cyprinus carpio Linnaeus and Clarias gariepinus Burchell. Minimum winter temperatures are demonstrated to have a major impact on...
  3. Sublethal effects of manganese on the haematology and osmoregulation of <em>Oreochromis mossambicus</em> after acute exposure

    Sublethal effects of manganese on the haematology and osmoregulation of <em>Oreochromis mossambicus</em> after acute exposure

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Oreochromis mossambicus were exposed for 96 hours to sublethal manganese concentrations in a continuous flow-through system. The sublethal concentrations were determined from the LC50 value of manganese (1.723mg/l), which included a 10% (172.3mg/l), 15% (259.8mg/l) and 20% (345.6mg/l) concentration of...
  4. The effect of copper and zinc at neutral and acidic pH on the blood coagulation of <em>Oreochromis mossambicus</em>

    The effect of copper and zinc at neutral and acidic pH on the blood coagulation of <em>Oreochromis mossambicus</em>

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The effect of copper and zinc on fish blood coagulation under alkaline and acidic conditions and the possible occurrence of disseminated intravascular clotting under these conditions have been poorly studied to date.
  5. The effect of copper and zinc at neutral and acidic pH on the general haematology and osmoregulation of <em>Oreochromis mossambicus</em>

    The effect of copper and zinc at neutral and acidic pH on the general haematology and osmoregulation of <em>Oreochromis mossambicus</em>

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The objective of this study was to determine the effect of sublethal copper and zinc concentrations at a neutral and an acidic pH, on selected haematological parameters as well as on the total osmolality and electrolyte concentrations of Oreochromis mossambicus...
  6. Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study

    Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Histopathological changes were identified in selected target organs from two freshwater fish species, Clarias gariepinus and Oreochromis mossambicus, inhabiting the hyper-eutrophic Roodeplaat Dam near Pretoria. A histology-based fish health assessment protocol was used, including a semiquantitative histopathological assessment of the...
  7. Evaluation of the fish health assessment index in the Olifants River system, South Africa

    Evaluation of the fish health assessment index in the Olifants River system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The 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...
  8. A comparison of diel feeding pattern, ingestion and digestive efficiency of <em>Oreochromis niloticus</em> and <em>Oreochromis macrochir</em> in Lake Chivero, Zimbabwe

    A comparison of diel feeding pattern, ingestion and digestive efficiency of <em>Oreochromis niloticus</em> and <em>Oreochromis macrochir</em> in Lake Chivero, Zimbabwe

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Possible reasons why Oreochromis niloticus have supplanted Oreochromis macrochir as the main commercial fish species in Lake Chivero, Zimbabwe, were investigated in 2006. Diel feeding trends, daily food consumption and protein digestion efficiencies of the two species were compared. Both...
  9. A study of the ichthyofauna of a small tropical reservoir, south-eastern lowveld, Zimbabwe

    A study of the ichthyofauna of a small tropical reservoir, south-eastern lowveld, Zimbabwe

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Fish diversity in Malilangwe Reservoir in the south-eastern lowveld of Zimbabwe was investigated in 2011 to determine the community structure. The aim of this study was to determine the current status of an artificial fish community in a small reservoir...