Articles by Keyword: West Coast Steenbras

Search results for West Coast Steenbras

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  1. Observations on the linefish resources of Namibia, 1990?2000, with special reference to West Coast steenbras and silver kob

    Observations on the linefish resources of Namibia, 1990?2000, with special reference to West Coast steenbras and silver kob

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The Namibian linefishery is a multisector fishery, with recreational and commercial sectors targeting overlapping species. Prior to 1990, catch data were recorded for the boat sector, but little research was done on the population dynamics of any of the species...
  2. Age and growth of two populations of West Coast steenbras Lithognathus aureti in Namibian waters, based on otolith readings and mark-recapture data

    Age and growth of two populations of West Coast steenbras Lithognathus aureti in Namibian waters, based on otolith readings and mark-recapture data

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Age and growth of West Coast steenbras Lithognathus aureti, sampled from two separate populations (northern and southern) along Namibia's coast, was determined using sectioned otoliths, and the results were validated using mark-recapture data. For both populations, the special three-parameter Von...
  3. An assessment of the current status and potential yield of Namibia's northern West Coast steenbras <em>Lithognathus aureti</em> population

    An assessment of the current status and potential yield of Namibia's northern West Coast steenbras <em>Lithognathus aureti</em> population

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Two distinct populations of West Coast steenbras Lithognathus aureti are found in Namibian waters; one, the northern population, is exploited recreationally and commercially. Data collected between 1995 and 1999 were used to evaluate its current state and potential yield, using...
  4. Nutrient levels of three <em>Eucalyptus</em> species/provenances, measured over four seasons in a trial along the sandy, dry, Cape West Coast of South Africa

    Nutrient levels of three <em>Eucalyptus</em> species/provenances, measured over four seasons in a trial along the sandy, dry, Cape West Coast of South Africa

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    Foliage nutrient content of 3 to 6-year old Eucalyptus species/provenances (E. camaldulensis, E. globulus and E. grandis x E. tereticornis) were analysed for eleven elements over a four-year period. The trial was planted on three sites, adjacent to each other,...
  5. The presence of right whales in summer on the west coast of South Africa: the evidence from historical records

    The presence of right whales in summer on the west coast of South Africa: the evidence from historical records

    Item type: Journal Article • Journal: African Journal of Marine Science
    Conventionally, southern right whales Eubalaena australis are portrayed as spending the summer on feeding grounds in the Antarctic and the winter on breeding grounds in coastal waters of the southern continents. Historical whaling records challenge this perception in the case...
  6. Large-scale changes in the spatial distribution of South African West Coast rock lobsters: an overview

    Large-scale changes in the spatial distribution of South African West Coast rock lobsters: an overview

    Item type: Journal Article • Journal: African Journal of Marine Science
    A major shift in resource availability in the West Coast rock lobster Jasus lalandii from the traditional fishing grounds on the West Coast to the more southern fishing grounds was observed between the late 1980s/early 1990s and the turn of...
  7. Food habits and trophic resource partitioning among three mormyrid fishes from man-made Lake Ayame, Ivory Coast

    Food habits and trophic resource partitioning among three mormyrid fishes from man-made Lake Ayame, Ivory Coast

    Item type: Journal Article • Journal: African Zoology
    Feeding habits and trophic relationships among three mormyrid species (Petrocephalus bovei, Marcusenius ussheri and Marcusenius furcidens) were assessed in the man-made Lake Ayame in Ivory Coast. The index of preponderance combining the occurrence and weight percentages of the identified prey...
  8. The origin of textural lamellae in Quaternary coast sands of Natal

    The origin of textural lamellae in Quaternary coast sands of Natal

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A new concept of the formation of textural subsoil lamellae has been developed on the basis of their morphology in aeolian coastal deposits in Natal. It has been concluded that they are initiated somewhere at depth in the profile by...
  9. Population genetic studies of horse mackerel <em>Trachurus trecae</em> and <em>Trachurus trachurus capensis</em> off Angola

    Population genetic studies of horse mackerel <em>Trachurus trecae</em> and <em>Trachurus trachurus capensis</em> off Angola

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Genetic variability of the Kunene horse mackerel Trachurus trecae and the Cape horse mackerel Trachurus trachurus capensis was examined using starch gel electrophoresis of enzymatic proteins on individuals collected along the Angolan coast. Six polymorphic enzyme loci were found in...
  10. A COMPARISON OF DIFFERENT METHODS OF AGE DETERMINATION IN THE SHARPTOOTH CATFISH <em>CLARIAS GARIEPINUS</em>

    A COMPARISON OF DIFFERENT METHODS OF AGE DETERMINATION IN THE SHARPTOOTH CATFISH <em>CLARIAS GARIEPINUS</em>

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Growth of the sharptooth catfish Clarias gariepinus from four southern African impoundments was estimated by back-calculating age from vertebrae and spines. Length frequency analysis supported the growth estimates derived from vertebrae but not those from spines.- Spines under-estimated the age...