Articles by Author: B E Marshall

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  1. Complementary dominance of <em>themeda triandra</em> and panicum maximum examined through shoot production

    Complementary dominance of <em>themeda triandra</em> and panicum maximum examined through shoot production

    Sustained regrowth after defoliation was typical of P. maximum plants grown in the shade, whereas T. triandra plants were weakened under these conditions. Of three provenances of T. triandra tested, the Lowveld form was less tolerant of shading than either...
  2. Burning and grazing of a <em>Themeda</em> grassland: Estimates of phytomass and root element concentrations

    Burning and grazing of a <em>Themeda</em> grassland: Estimates of phytomass and root element concentrations

    Burning and grazing of highland grasses were examined in Döhne Sourveld to determine the effects on shoot and root masses. Root:shoot ratios of 1:4 and 1:3 were obtained for quadrennial and biennial burns respectively after two years of growth. The...
  3. ON THE STATUS OF CLARIAS GARIEPINUS (BURCHELL) IN LARGE MAN-MADE LAKES IN RHODESIA

    ON THE STATUS OF CLARIAS GARIEPINUS (BURCHELL) IN LARGE MAN-MADE LAKES IN RHODESIA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Data from some large man-made lakes in Rhodesia suggest that the populations of Clarias gariepinus have declined in these lakes. The reasons for this are not clear although commercial fishing does not appear to be responsible.
  4. Short Notes

    Short Notes

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
  5. CHANGES IN THE ABUNDANCE AND MORTALITY RATE OF TIGERFISH IN THE EASTERN BASIN OF LAKE KARIBA

    CHANGES IN THE ABUNDANCE AND MORTALITY RATE OF TIGERFISH IN THE EASTERN BASIN OF LAKE KARIBA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Tigerfish populations increased in the eastern basin of Lake Kariba following the successful invasion of the pelagic clupeid Limmothrissa miodon. Strong year-classes persisted for several years but the number of young tigerfish declined, a phenomenon which cannot be accounted for...