Articles by Author: A Todd

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  1. OBSERVATIONS ON THE DIETARY CHOICE OF FREE-RANGING JUVENILE OSTRICHES

    OBSERVATIONS ON THE DIETARY CHOICE OF FREE-RANGING JUVENILE OSTRICHES

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Cooper, S.M. & Palmer, T. 1994. Observations on the dietary choice of free-ranging juvenile Ostriches. Ostrich 65:251-255.
  2. Patterns of seed production and shrub association in two palatable Karoo shrub species under contrasting land use intensities

    Patterns of seed production and shrub association in two palatable Karoo shrub species under contrasting land use intensities

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Seed production and shrub association patterns of the two palatable shrubs. Tripteris sinuatum and Tetragoma froticosa were investigated on heavily grazed communal and lightly grazed commercial rangeland in the succulent karoo, Namaqualand. Seed production in both these species was substantially...
  3. Correlates of stocking rate and overgrazing in the Leliefontein Communal Reserve, central Namaqualand

    Correlates of stocking rate and overgrazing in the Leliefontein Communal Reserve, central Namaqualand

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    We investigate the correlates of stocking rate in the Leliefontein communal reserve and attempt to provide a mechanistic explanation of the controlling factors. We further speculate on how high stocking rates are maintained in relation to the current state of...
  4. Aesthetic, Ethical, and Cognitive Value

    Aesthetic, Ethical, and Cognitive Value

    Item type: Journal Article • Journal: South African Journal of Philosophy
    This paper addresses two recent debates in aesthetics: the ‘moralist debate’, concerning the relationship between the ethical and aesthetic evaluations of artworks, and the ‘cognitivist debate’, concerning the relationship between the cognitive and aesthetic evaluations of artworks. Although the two...
  5. The phylogenetic affinities of <em>Trachylepis sulcata nigra</em> and the intraspecific evolution of coastal melanism in the western rock skink

    The phylogenetic affinities of <em>Trachylepis sulcata nigra</em> and the intraspecific evolution of coastal melanism in the western rock skink

    Item type: Journal Article • Journal: African Zoology
    The phylogenetic affinities of the melanistic subspecies Trachylepis sulcata nigra have never been investigated, and it was unclear if this subspecies represented a locally adapted population or a distinct species. Sequences from the nuclear marker RAG-1 (1149 bp), two novel...
  6. Operator work-related musculoskeletal disorders during forwarding operations in South Africa: an ergonomic assessment

    Operator work-related musculoskeletal disorders during forwarding operations in South Africa: an ergonomic assessment

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Forest machine operators are still experiencing work-related musculoskeletal disorders (WMSDs) despite extensive mechanisation and modernisation of harvesting systems. However, paucity of local ergonomics research and technology transfer problems may affect the use of mechanised systems in South Africa. Consequently, this...
  7. A review of the genus <em>Homopholis</em> Boulenger (Reptilia: Squamata: Gekkonidae) in southern Africa

    A review of the genus <em>Homopholis</em> Boulenger (Reptilia: Squamata: Gekkonidae) in southern Africa

    Item type: Journal Article • Journal: African Journal of Herpetology
    On the basis of molecular data, the gekkonid lizard Homopholis arnoldi Loveridge is revived as a full species. Morphologically it is usually distinguishable from H. wahlbergii on the basis of its striped dorsal colour pattern. Homopholis arnoldi has a wide...
  8. Multi-stakeholder collaboration yields valuable data for cetacean conservation in Gamba, Gabon

    Multi-stakeholder collaboration yields valuable data for cetacean conservation in Gamba, Gabon

    Item type: Journal Article • Journal: African Journal of Marine Science
    Private industry, the Government of Gabon and two international NGOs collaborated to conduct marine surveys off the coast of Gabon, Central Africa. Surveys addressed multiple objectives of surveillance and monitoring, the documentation of the distribution of and threats to the...
  9. Reflections, applications and future directions of Long-Term Ecological Research at Tierberg<xref ref-type="fn" rid="FN0000"/>

    Reflections, applications and future directions of Long-Term Ecological Research at Tierberg<xref ref-type="fn" rid="FN0000"/>

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Tierberg-LTER is a research site established in 1987 in the semi-arid Succulent Karoo near Prince Albert in the Western Cape province, South Africa. The original purpose for its establishment was to study ecosystem dynamics and the drivers of vegetation in...
  10. Long-term impacts of livestock grazing and browsing in the Succulent Karoo: a 20-year study of vegetation change under different grazing regimes in Namaqualand<xref ref-type="fn" rid="FN0000"/>

    Long-term impacts of livestock grazing and browsing in the Succulent Karoo: a 20-year study of vegetation change under different grazing regimes in Namaqualand<xref ref-type="fn" rid="FN0000"/>

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    This study used a fence-line contrast approach to investigate the long-term impact of high grazing pressure on the vegetation at a site in Namaqualand, South Africa. Forty pairs of permanently marked plots were surveyed in 1996, 2006 and 2016. The...