Articles by Keyword: Variogram

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  1. Fine-scale spatial variability of different stages of pelagic fish eggs over the western Agulhas Bank, South Africa

    Fine-scale spatial variability of different stages of pelagic fish eggs over the western Agulhas Bank, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Stage-dependent spatial distributions of anchovy Engraulis encrasicolus, sardine Sardinops sagax and round herring Etrumeus whiteheadi eggs over the western Agulhas Bank South Africa were examined from samples collected at a fine-scale (1.8 km) resolution using a continuous underway fish egg...
  2. Spatial considerations when monitoring reef fishes

    Spatial considerations when monitoring reef fishes

    Item type: Journal Article • Journal: African Journal of Marine Science
    Spatial dependence can obscure relationships between response and explanatory variables because of structuring within the residuals reducing variance and biasing coefficient estimates. Here, we highlight the influence of the spatial component, in the presence of spatial dependence, on abundance trends...