Articles by Author: David J Marshall

Search results for David J Marshall

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  1. Amiodarone-induced thyroid dysfunction

    Amiodarone-induced thyroid dysfunction

    Background. Little is known about the frequency of thyroid dysfunction (TD) associated with amiodarone therapy in southern Africa.
  2. Three new species of the marine littoral mite <em>Hyadesia</em> (<em>Parahyadesia</em>) (Astigmata: Hyadesiidae) from southern Africa

    Three new species of the marine littoral mite <em>Hyadesia</em> (<em>Parahyadesia</em>) (Astigmata: Hyadesiidae) from southern Africa

    Item type: Journal Article • Journal: African Zoology
    The marine mite family Hyadesiidae (Astigmata) comprises two genera (Hyadesia and Amhyadesia) with about 40 species worldwide. The taxon is restricted to littoral/supralittoral zones, having no true terrestrial representation. Collections from across southern Africa, from Elandsbaai on the west coast...
  3. First records and descriptions of the marine littoral mite genus <em>Amhyadesia</em> Fain and Ganning 1979 (Acari : Astigmata : Hyadesiidae) from southern Africa

    Item type: Journal Article • Journal: South African Journal of Zoology
    Three species of the rocky-shore inhabiting mite genus Amhyadesia Fain and Ganning 1979 (Acari, Astigmata. Hyadesiidae) were present in collections made across the extent of the southern African sub-continent, from Elandsbaai on the west coast to Inhambane (Mozambique) on the...
  4. Two new species of <em>Schusteria</em> (Acari: Oribatida: Ameronothroidea) from marine shores in southern Africa

    Two new species of <em>Schusteria</em> (Acari: Oribatida: Ameronothroidea) from marine shores in southern Africa

    Item type: Journal Article • Journal: African Zoology
    Oribatid mites are typically terrestrial, though many species of Ameronothroidea are marine intertidal. Marine ameronothroids are cosmopolitan with genera being endemic to the Holarctic, sub-Antarctic, or equatorial Indo-Pacific and tropicalAtlantic regions. Recent collections from rocky-shores and mangroves of the subtropical...
  5. 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...
  6. 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...
  7. Bookreviews

    Bookreviews

    Item type: Journal Article • Journal: South African Journal of African Languages
  8. Book Review

    Book Review

    Item type: Journal Article • Journal: South African Journal of Philosophy
  9. Editorial

    Editorial

    Item type: Journal Article • Journal: South African Journal of Philosophy
  10. Editorial

    Editorial

    Item type: Journal Article • Journal: South African Journal of Philosophy