Articles by Keyword: Echosounder Mapping

Search results for Echosounder Mapping

We found 36 results for you
  1. Bathymetry, substrate and fishing areas of Southeast Atlantic high-seas seamounts

    Bathymetry, substrate and fishing areas of Southeast Atlantic high-seas seamounts

    Item type: Journal Article • Journal: African Journal of Marine Science
    Most of the Southeast Atlantic Ocean is abyssal, and global bathymetries suggest that only ∼3.2% of the areas beyond national jurisdiction (ABNJ; also known as the high seas, as defined in the United Nations Convention on the Law of the...
  2. Association of a stem rust resistance gene (<em>Sr45</em>) and two Russian wheat aphid resistance genes (<em>Dn5</em> and <em>Dn7</em>) with mapped structural loci in common wheat

    Association of a stem rust resistance gene (<em>Sr45</em>) and two Russian wheat aphid resistance genes (<em>Dn5</em> and <em>Dn7</em>) with mapped structural loci in common wheat

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A stem rust resistance gene, originally derived from Triticum tauschii accession RL5289 and present in the germplasm line 87M66-2-1, is here designated Sr45. Sr45 was found to be closely linked to Sr33 (9 ± 1.9 map units) and the centromere...
  3. Classifying the sensitivity of soils of the South African highveld to acidification

    Classifying the sensitivity of soils of the South African highveld to acidification

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The potentially acidifying impact of air pollution coupled with agriculture and forestry has stimulated interest in the spatial assessment of soil quality deterioration in the highveld and eastern escarpment region of South Africa. Current information on soils is available as...
  4. Using Ground Penetrating Radar to investigate spoil layers in rehabilitated minesoils

    Using Ground Penetrating Radar to investigate spoil layers in rehabilitated minesoils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Opencast coal mining on the Highveld of Mpumalanga involves the disturbance of highly productive soils, which must then be rehabilitated on top of the mined spoil. Various problems in this process may occur, however, which may lead to water-logging, compaction...
  5. Development of a doubled haploid mapping population and linkage map for the bread wheat cross Kariega × Avocet S

    Development of a doubled haploid mapping population and linkage map for the bread wheat cross Kariega × Avocet S

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A doubled haploid wheat population of 150 lines was constructed from the F1 of a cross between cultivars Kariega and Avocet S using the wheat-maize technique. Segregation and linkage analysis of 203 DNA markers, two storage protein markers and the...
  6. Effect of segregation distortion on genetic mapping of a PI 294994-derived Russian Wheat Aphid resistance gene

    Effect of segregation distortion on genetic mapping of a PI 294994-derived Russian Wheat Aphid resistance gene

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    An earlier genetic mapping study with an unidentified Russian Wheat Aphid resistance gene, referred to as Dn? and derived from PI 294994, suggested that the gene occurs close to the centromere on 7DS. Closer inspection of the map data showed...
  7. Advances in pedology in South Africa

    Advances in pedology in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The ability of soil to serve as a unique buffer of water, organic carbon, nutrients, pH, redox and temperature is recognised in environmental research. A detailed study on hardpan carbonate and dorbank horizons in the commonly occurring ‘heuweltjies’ of the...
  8. Disaggregation of land types using terrain analysis, expert knowledge and GIS methods

    Disaggregation of land types using terrain analysis, expert knowledge and GIS methods

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Soil maps’ value is increasingly recognised for enabling the optimal management of ecosystems. Digital soil mapping (DSM) can overcome the cost constraints of traditional mapping methods, but requires local area-specific research. As South Africa is blessed with the land type...
  9. A Note On Homotopy Pushout And Homotopy Coherence

    A Note On Homotopy Pushout And Homotopy Coherence

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    We present a self-contained argument, characterising a homotopy pushout square by recognising it as an initial object in a certain coherent homotopy category of spaces under a cotriad.
  10. A new compactness type topological property

    A new compactness type topological property

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    By a gauge on a topological space we shall mean a mapping that assigns each element in the space an open neighbourhood. We investigate some topological properties which can be characterized using gauges. The main property we will consider is...