Articles by Keyword: Freshwater Fish

Search results for Freshwater Fish

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  1. THE PLASMA PROTEINS OF SOME FRESHWATER FISH IN THEIR NATURAL ENVIRONMENT

    THE PLASMA PROTEINS OF SOME FRESHWATER FISH IN THEIR NATURAL ENVIRONMENT

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The plasma proteins of Cyprinus carpio (carp), Barbus holubi (yellowfish), Labeo umbratus (mudfish) and Labeo capensis (mudfish) were electrophoretically separated on polyacrylamide gels from blood samples obtained from specimens sampled during summer and winter in three different localities. Within a...
  2. EFFECT OF CATTLE DIP CONTAINING TOXAPHENE ON THE FAUNA OF A SOUTH AFRICAN RIVER

    EFFECT OF CATTLE DIP CONTAINING TOXAPHENE ON THE FAUNA OF A SOUTH AFRICAN RIVER

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    In August 1978 the Hluhluwe River, which runs through the Hluhluwe Game Reserve (Natal, South Africa), was polluted by toxaphene from a cattle dip tank. Faunal surveys were conducted to determine the impact of the insecticide on the fish and...
  3. AN EVALUATION OF BABY FISH FOOD AS A SUITABLE DIET FOR THE FRESHWATER SNAIL, <em>BIOMPHALABIA GLABRATA</em> (SAY)

    AN EVALUATION OF BABY FISH FOOD AS A SUITABLE DIET FOR THE FRESHWATER SNAIL, <em>BIOMPHALABIA GLABRATA</em> (SAY)

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Tetra Kin Baby Fish Food ā€˜Eā€™ for Egglayers (Tetra ā€˜Eā€™) was evaluated as a possible nutrient for the laboratory culture and maintenance of pigmented and unpigmented Biomphalaria glabrata (Say). Growth was monitored weekly by determining shell diameter and mass. The...
  4. SOME OBSERVATIONS ON FISH MIGRATIONS IN CAPRIVI, NAMIBIA

    SOME OBSERVATIONS ON FISH MIGRATIONS IN CAPRIVI, NAMIBIA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Longitudinal and lateral migrations of freshwater fish were observed in 63 (83%) of the fish of the Upper Zambezi in the Caprivi region, Namibia. The results of 20 surveys showed that longitudinal upstream migrations were undertaken by most small cyprinids,...
  5. FRESHWATER FISH OF THE ADDO ELEPHANT NATIONAL PARK

    FRESHWATER FISH OF THE ADDO ELEPHANT NATIONAL PARK

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    This study aimed to determine the distribution and relative abundance of freshwater fish in the Addo Elephant National Park. A total of 1578 fish specimens of 12 species were collected during surveys carried out in the Sundays River and four...
  6. The sublethal effects of zinc at different water temperatures on selected haematological variables in <em>Oreochromis mossambicus</em>

    The sublethal effects of zinc at different water temperatures on selected haematological variables in <em>Oreochromis mossambicus</em>

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Trace metals such as zinc play an important role in the normal metabolic functioning of all organisms. However, metals can become toxic if background concentrations are exceeded in the environment. This study investigated the sublethal effects of zinc on the...
  7. Can small-scale fisheries contribute to poverty alleviation in traditionally non-fishing communities in South Africa?

    Can small-scale fisheries contribute to poverty alleviation in traditionally non-fishing communities in South Africa?

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    There has been considerable debate as to the contribution that fishing activities can make to food security and income generation in rural areas of South Africa where fishing has not traditionally been practised. The rural areas in the eastern half...
  8. The development of a GIS atlas of southern African freshwater fish

    The development of a GIS atlas of southern African freshwater fish

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    A geographic information systems (GIS) based atlas of southern African freshwater fish has been developed for the SADC countries. The JLB Smith Institute of Ichthyology, in collaboration with ALCOM, has developed a database of freshwater fish for this region from...
  9. A preliminary assessment of impacts on estuarine associated fauna resulting from an intra-basin transfer and fresh water abstraction from aquatic systems in the Richards Bay area of KwaZulu-Natal, South Africa

    A preliminary assessment of impacts on estuarine associated fauna resulting from an intra-basin transfer and fresh water abstraction from aquatic systems in the Richards Bay area of KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    An intra-basin transfer and the abstraction of water from aquatic systems in the Richards Bay area has led to the construction of six barriers which are restricting faunal movement, a reduction of flow to the Mhlathuze and Nhlabane estuaries and...
  10. The need for research and monitoring on the impacts of translocated sharptooth catfish, <em>Clarias gariepinus</em>, in South Africa

    The need for research and monitoring on the impacts of translocated sharptooth catfish, <em>Clarias gariepinus</em>, in South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The sharptooth catfish, Clarias gariepinus (Burchell, 1822), is a widespread African freshwater fish species which occurs naturally from the Nile to the Orange River. Through translocation aquaculturists, farmers, anglers and engineers have helped to extend its range into many South...