Articles by Author: Louis H Du Preez

Search results for Louis H Du Preez

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  1. Seasonal pattern of chytridiomycosis in common river frog (<em>Amietia angolensis</em> ) tadpoles in the South African Grassland Biome

    Seasonal pattern of chytridiomycosis in common river frog (<em>Amietia angolensis</em> ) tadpoles in the South African Grassland Biome

    Item type: Journal Article • Journal: African Zoology
    Environmental parameters such as temperature and rainfall influence the biology of amphibians and are likely to similarly influence the growth and prevalence of associated pathogens. Amphibian chytrid fungus, Batrachochytrium dendrobatidis (Bd), causes an infectious disease, chytridiomycosis, in amphibians worldwide. Field...
  2. Resolving the confusion: <em>Amietia vertebralis</em> and <em>A. umbraculata</em> tadpole morphology

    Resolving the confusion: <em>Amietia vertebralis</em> and <em>A. umbraculata</em> tadpole morphology

    Item type: Journal Article • Journal: African Zoology
    Morphological similarities between the tadpoles of Amietia umbraculata and A. vertebralis have led to confusion and incorrect descriptions and identifications in the literature. Based on 33 body measurements and ratios we revised the morphological descriptions of the tadpoles of the...
  3. Polystomatidae (Monogenea) of southern African Anura: <em>Polystoma channingi</em> n.sp. parasitic in two closely related <em>Cacosternum species</em>

    Polystomatidae (Monogenea) of southern African Anura: <em>Polystoma channingi</em> n.sp. parasitic in two closely related <em>Cacosternum species</em>

    Item type: Journal Article • Journal: African Zoology
    Polystoma channingi is described as a new species of polystomatid flatworm (Monogenea) parasitic in the urinary bladder of Cacosternum nanum in the Eastern Cape Province, South Africa. In a locality where C. nanum and C. boettgeri occur sympatrically the parasite...
  4. <em>Eupolystoma namibiensis</em> n. sp. (Monogenea: Polystomatidae) parasitic in <em>Poyntonophrynus hoeschi</em> (Ahl, 1934) of Namibia

    <em>Eupolystoma namibiensis</em> n. sp. (Monogenea: Polystomatidae) parasitic in <em>Poyntonophrynus hoeschi</em> (Ahl, 1934) of Namibia

    Item type: Journal Article • Journal: African Zoology
    Described species of the polystomatid flatworm genus Eupolystoma are only known from Africa and India. A survey conducted in January 1994 in Namibia revealed a previously unknown species from the urinary bladder of Hoesch's pygmy toad Poyntonophrynus hoeschi. Toads were...
  5. Additional morphological information on <em>Oculotrema hippopotami</em> Stunkard, 1924 (Monogenea: Polystomatidae) parasitic on the African hippopotamus

    Additional morphological information on <em>Oculotrema hippopotami</em> Stunkard, 1924 (Monogenea: Polystomatidae) parasitic on the African hippopotamus

    Item type: Journal Article • Journal: African Zoology
    Oculotrema hippopotami Stunkard, 1924, is the only monogenean known from a homoiotherm host, namely the African hippopotamus (Hippopotamus amphibius Linnaeus, 1758). The original description was based on five shrunken, unflattened specimens. Initially O. hippopotami was not widely accepted as a...
  6. Do public attitudes affect conservation effort? Using a questionnaire-based survey to assess perceptions, beliefs and superstitions associated with frogs in South Africa

    Do public attitudes affect conservation effort? Using a questionnaire-based survey to assess perceptions, beliefs and superstitions associated with frogs in South Africa

    Item type: Journal Article • Journal: African Zoology
    Globally, amphibians are among the least appreciated vertebrates and are often negatively perceived by the general public. Such attitudes are particularly prevalent in South Africa, where fear, superstitions and myths associated with frogs are pervasive in some cultures. These attitudes...
  7. Utilization of <em>Lolium multiflorum</em> by sheep 1. Influence of dry matter content and correlated factors on voluntary intake

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The intake by young sheep of Lolium multiflorum cv. Midmar (ryegrass) with dry matter (DM) contents of between 10.2% and 20.5% was studied. Intake was measured on pasture, while at the same time herbage was cut and fed either fresh...
  8. Utilization of <em>Lolium multiflorum</em> by sheep 2. The effect of drying the herbage on soluble nitrogen content and partial digestion

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The amount of soluble N and the effective degradation of fresh and dry herbage of Lolium multiflorum cv. Midmar (ryegrass) was determined by the nylon bag technique. In another experiment the digestion and disappearance of organic matter (OM) and nitrogen...