Articles by Author: R G Wieland

Search results for R G Wieland

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  1. The use of microplots to sample grassveld in Lesotho

    The use of microplots to sample grassveld in Lesotho

    Permanent range condition monitoring stations were established at the mountainous area of Molumong in Lesotho. The parameters most commonly used to determine range condition trend were evaluated for repeatability under various situations. These parameters include frequency and basal area of...
  2. Diel effects on bottom-trawl survey catch rates of shallow- and deep-water Cape hakes <em>Merluccius capensis</em> and <em>M. paradoxus</em> off Namibia, using solar zenith angle

    Diel effects on bottom-trawl survey catch rates of shallow- and deep-water Cape hakes <em>Merluccius capensis</em> and <em>M. paradoxus</em> off Namibia, using solar zenith angle

    Item type: Journal Article • Journal: African Journal of Marine Science
    Diel patterns in survey trawl catches for the Cape hakes Merluccius capensis and M. paradoxus off Namibia were studied in order to examine the effect of diel bias on catchability, and its implication for survey abundance estimation and the consistency...