Articles by Author: Nico J Smit

Search results for Nico J Smit

We found 187 results for you
  1. Large allozyme variation within populations and isozyme differences between <em>Clarias gariepinus</em> and <em>C. ngamensis</em> from the Okavango Delta, Botswana

    Large allozyme variation within populations and isozyme differences between <em>Clarias gariepinus</em> and <em>C. ngamensis</em> from the Okavango Delta, Botswana

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    An allozyme study of 47 Clarias gariepinus and 53 C. ngamensis individuals revealed variation at 11 (57.9%) and eight (40%), out of 19 and 20 loci, respectively. The average heterozygosity of 0.167, 57.9% polymorphism and average of 1.895 alleles at...
  2. BECVOL 3: an expansion of the aboveground biomass quantification model for trees and shrubs to include the wood component

    BECVOL 3: an expansion of the aboveground biomass quantification model for trees and shrubs to include the wood component

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    A quantitative description of woody plant communities that aimed at aiding studies on grass–tree competition interactions, bush encroachment and estimation of food to browser herbivore species, was proposed during 1989. It evolved as the BECVOL-model and differs from other methods...
  3. The development of an expert system for arid rangeland management in central Namibia with emphasis on bush thickening

    The development of an expert system for arid rangeland management in central Namibia with emphasis on bush thickening

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    An online decision support system derived from research and expert knowledge was developed for arid rangeland management in central Namibia. The expert system emphasises the control of bush thickening and is divided into three forms of decisions: adaptive, reactive and...
  4. Response of <em>Colophospermum mopane</em> to different intensities of tree thinning in the Mopane Bushveld of southern Africa

    Response of <em>Colophospermum mopane</em> to different intensities of tree thinning in the Mopane Bushveld of southern Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    In the Mopane Bushveld, Colophospermum mopane is viewed as a threat due to its ability to suppress the herbaceous layer. The objective of this study was to investigate the re-establishment of C. mopane over a 19-year period on seven plots...
  5. Description of a new gnathiid, <em>Afrignathia multicavea</em> gen. et sp. n. (Crustacea: Isopoda: Gnathiidae), from South Africa

    Description of a new gnathiid, <em>Afrignathia multicavea</em> gen. et sp. n. (Crustacea: Isopoda: Gnathiidae), from South Africa

    Item type: Journal Article • Journal: African Zoology
    A new genus and species of gnathiid isopod, Afrignathia multicavea gen. et sp. n., is described from material collected during the 1960s and 1970s in False Bay, offshore between Still Bay and Mossel Bay, and off Cape Point. This gnathiid...
  6. First record of an intraleucocytic haemogregarine (Adeleorina: Haemogregarinidae) from South African tortoises of the species <em>Stigmochelys pardalis</em> (Cryptodira: Testudinidae)

    First record of an intraleucocytic haemogregarine (Adeleorina: Haemogregarinidae) from South African tortoises of the species <em>Stigmochelys pardalis</em> (Cryptodira: Testudinidae)

    Item type: Journal Article • Journal: African Zoology
    To date, four intraerythrocytic apicomplexans, namely the haemogregarines Haemogregarina fitzsimonsi and Haemogregarina parvula, and the haemoproteids Haemoproteus testudinalis and Haemoproteus natalensis, have been described from South African land tortoises. Recently, an intraleucocytic haemogregarine was observed in one species of tortoise,...
  7. Histological confirmation of epizootic ulcerative syndrome in two cyprinid species from Lake Liambezi, Zambezi Region, Namibia

    Histological confirmation of epizootic ulcerative syndrome in two cyprinid species from Lake Liambezi, Zambezi Region, Namibia

    Item type: Journal Article • Journal: African Zoology
    Epizootic ulcerative syndrome (EUS) is a fish disease caused by an infection of the oomycete, Aphanomyces invadans. During a fish biodiversity assessment of Lake Liambezi, Zambezi Region, Namibia, in August 2011, two Barbus haasianus and three Barbus unitaeniatus with circular...
  8. Marine fish parasitology in South Africa: history of discovery and future direction

    Marine fish parasitology in South Africa: history of discovery and future direction

    Item type: Journal Article • Journal: African Zoology
    Almost 200 years have passed since the first description of a marine fish parasite from South Africa. It is therefore an opportune time to look back, take stock of and reflect on the history of discovery within this field and,...
  9. Review of <em>Mothocya</em> Costa, in Hope, 1851 (Crustacea: Isopoda: Cymothoidae) from southern Africa, with the description of a new species

    Review of <em>Mothocya</em> Costa, in Hope, 1851 (Crustacea: Isopoda: Cymothoidae) from southern Africa, with the description of a new species

    Item type: Journal Article • Journal: African Zoology
    Three species of Mothocya are reported from the east coast of southern Africa: Mothocya plagulophora (Haller, 1880) from Maputo, Mozambique, from the gills of Hemiramphus far (Forsskål, 1775); Mothocya renardi (Bleeker, 1857) from diverse localities in South Africa and Mozambique,...
  10. First <em>Hemolivia</em> from southern Africa: reassigning chelonian <em>Haemogregarina parvula</em> Dias, 1953 (Adeleorina: Haemogregarinidae) to <em>Hemolivia</em> (Adeleorina: Karyolysidae)

    First <em>Hemolivia</em> from southern Africa: reassigning chelonian <em>Haemogregarina parvula</em> Dias, 1953 (Adeleorina: Haemogregarinidae) to <em>Hemolivia</em> (Adeleorina: Karyolysidae)

    Item type: Journal Article • Journal: African Zoology
    To date, only a single species of Hemolivia, Hemolivia mauritanica (Sergent & Sergent, 1904), has been described from African terrestrial tortoises. Although various haemogregarines have been described from southern African terrapins and tortoises, including species from the genus Haemogregarina and...