Articles by Keyword: Relative Abundance

Search results for Relative Abundance

We found 109 results for you
  1. Acoustic behaviour of southern right whales in relation to numbers of whales present in Walker Bay, South Africa

    Acoustic behaviour of southern right whales in relation to numbers of whales present in Walker Bay, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Estimating numbers of whales present in an area from recorded call rates could be a useful conservation tool. We recorded southern right whale Eubalaena australis vocalisations and presence in Walker Bay on the south coast of South Africa. In all,...
  2. Spatial and seasonal patterns in sighting rate and life-history composition of the white shark <em>Carcharodon carcharias</em> at Mossel Bay, South Africa

    Spatial and seasonal patterns in sighting rate and life-history composition of the white shark <em>Carcharodon carcharias</em> at Mossel Bay, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    White sharks Carcharodon carcharias aggregate at specific times of the year at localities along the South African coast. At Mossel Bay, on the southern Cape coast, four sites were sampled (Seal Island, Hartenbos, Kleinbrak and Grootbrak) to investigate spatial and...
  3. Baited remote underwater video system (BRUVs) survey of chondrichthyan diversity in False Bay, South Africa<xref ref-type="fn" rid="FN0001"/>

    Baited remote underwater video system (BRUVs) survey of chondrichthyan diversity in False Bay, South Africa<xref ref-type="fn" rid="FN0001"/>

    Item type: Journal Article • Journal: African Journal of Marine Science
    Global declines in chondrichthyan populations necessitate evidence‑based planning for their conservation. False Bay, in south‑west South Africa, has a high diversity of marine biota, with Atlantic and Indian Ocean influences, but its chondrichthyan fauna is poorly described ecologically. False Bay...
  4. Estimating Cape hare occupancy and abundance in southern Tunisia using spotlighting data

    Estimating Cape hare occupancy and abundance in southern Tunisia using spotlighting data

    Item type: Journal Article • Journal: African Zoology
    This study outlines the importance of integrating spotlighting data and occupancy modelling to estimate the spatial occupancy, abundance and habitat preferences of Cape hares Lepus capensis in southern Tunisia. Exploring the spatial distribution pattern of this species is problematic because...
  5. 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...
  6. Growth analysis of <em>themeda triandra</em> and <em>sporobolus fimbriatus</em> tillers in semi‐arid grassveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Marked populations of Themeda triandra and Sporobolus fimbriatus tillers were sequentially harvested at fortnightly intervals both under irrigation and under unamended moisture conditions. Sampling covered a period from tiller initiation through to senescence after flowering.
  7. The influence of tiller age and time of year on the growth of <em>Themeda tri andra</em> and <em>Sporobolus fimbriatus</em> in semi‐arid grassveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Sequential growth measurements were made on successive populations of Themeda triandra and Sporobolus fimbriatus tillers initiated at different times of the year. The independent influences of tiller age and time of year on tiller growth were isolated by deriving growth...
  8. Changes in plant water relations of wheat and soybeans after relief of water stress

    Changes in plant water relations of wheat and soybeans after relief of water stress

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The ability of a crop to recover from a mild or severe water stress and the rate of recovery are of importance for irrigation management and are also linked to the drought resistance and water use efficiency of the crop...
  9. The influence of rainfall on the seasonal abundance and flight activity of the maize stalk borer, <em>Busseola fusca</em> in South Africa

    The influence of rainfall on the seasonal abundance and flight activity of the maize stalk borer, <em>Busseola fusca</em> in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    This study attempts to demonstrate the extent to which seasonal fluctuations in the number of Busseola fusca (Fuller) moths can be explained by precipitation data. Daily flight activity is shown to be enhanced by cool, humid conditions and restricted by...
  10. Evaluation of the relative water content and the reduction of 2,3,5-triphenyltetrazoliumchloride as indicators of drought tolerance in spring wheat cultivars

    Evaluation of the relative water content and the reduction of 2,3,5-triphenyltetrazoliumchloride as indicators of drought tolerance in spring wheat cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The aim of this study was to evaluate the relative water content and the reduction of 2,3,5-triphenyltetrazoliumchloride, as indicators of drought stress and drought tolerance in spring wheat cultivars (Triticum aestivum L.) grown in the Western Cape. Drought stress was...