Articles by Keyword: Tag Recapture Data

Search results for Tag Recapture Data

We found 96 results for you
  1. Population structure of the sicklefin lemon shark <em>Negaprion acutidens</em> within the Curieuse Marine National Park, Seychelles

    Population structure of the sicklefin lemon shark <em>Negaprion acutidens</em> within the Curieuse Marine National Park, Seychelles

    Item type: Journal Article • Journal: African Journal of Marine Science
    This study produced the first data on population parameters for sicklefin lemon shark Negaprion acutidens at the granitic Seychelles Islands, adding to a limited catalogue of species information. Juveniles at a site in the Curieuse Marine National Park were tagged...
  2. Age and growth of narrow-barred Spanish mackerel <em>Scomberomorus commerson</em> in the coastal waters of southern Mozambique and KwaZulu-Natal, South Africa

    Age and growth of narrow-barred Spanish mackerel <em>Scomberomorus commerson</em> in the coastal waters of southern Mozambique and KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The narrow-barred Spanish mackerel Scomberomorus commerson is one of the most important linefish species caught in KwaZulu-Natal and southern Mozambique waters, forming the basis of important commercial, artisanal and recreational fisheries. A total of 439 S. commerson were sampled along...
  3. Conservation Developments in South African Forestry

    Item type: Journal Article • Journal: South African Forestry Journal
    The historical development of environmental conservational activities within the South African Forestry Industry is followed, and the changing emphasis from the conservation of the remaining indigenous forests (pre-1900) to water conservation, to natural assets and unplanted areas is highlighted. The...
  4. A simple method for supplementing long-term weather records in a maize-modelling exercise

    A simple method for supplementing long-term weather records in a maize-modelling exercise

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Missing weather data is a very real problem when using daily-incrementing crop growth simulation models. This is especially true in the case of daily air temperature and solar radiation data. The aim of this study was to compare two simple...
  5. Prosedures en probleme by die gebruik van die PUTU9–87 gewasgroeisimulasiemodel vir koring onder besproeiing in die Vanderkloof-Staatswaterskema

    Prosedures en probleme by die gebruik van die PUTU9–87 gewasgroeisimulasiemodel vir koring onder besproeiing in die Vanderkloof-Staatswaterskema

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die doel van hierdie ondersoek was om die PUTU9–87 gewasgroeisimulasiemodelte kalibreer om koringop-brengste en die grondwaterinhoud op 'n bevredlgende wyse in die Vanderkloof-Staatswaterskema te voor- spel, gegewe beperkte eksperimentele data. Opbrengste wat met PUTU voorspel is, word vergelyk met eksperimentele...
  6. Using the Nearest Neighbour method to substitute missing daily solar radiation data

    Using the Nearest Neighbour method to substitute missing daily solar radiation data

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Ground level solar radiation reflects the amount of energy that reaches the earth's surface and is utilised by people, animals and plants. Biological models often require such radiation records for long periods of time, however, a lack of radiation data...
  7. Open-top chambers to study air pollution impacts in South Africa. Part I: microclimate in open-top chambers

    Open-top chambers to study air pollution impacts in South Africa. Part I: microclimate in open-top chambers

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    South Africa's large industrial growth has created an obvious need to extend, improve and evaluate air pollution impacts on plants in order to assess present-day and future impacts of air pollutants on crop yields. In order to provide guidelines for...
  8. Estimation of thrips (<em>Fulmekiola serrata</em> Kobus) density in sugarcane using leaf-level hyperspectral data

    Estimation of thrips (<em>Fulmekiola serrata</em> Kobus) density in sugarcane using leaf-level hyperspectral data

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The aim of this study was to investigate the potential use of leaf-level hyperspectral data to predict the density of sugarcane thrips Fulmekiola serrata (Kobus). A hand-held spectroradiometer was used to make the spectral measurements on spindle leaves of 4-...
  9. Web-based teaching, learning and research using accessible real-time data obtained from field-based agrometeorological measurement systems<xref rid="FN0001"/>

    Web-based teaching, learning and research using accessible real-time data obtained from field-based agrometeorological measurement systems<xref rid="FN0001"/>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    To enhance teaching and learning in agrometeorology and allied disciplines, a Web-based data and information system was developed. The system uses field-based agrometeorologcial measurements, from automatic weather, radiation and temperature stations, to collect and display near real-time and previous data...
  10. The impact of emigration on population estimates of deep-sea red <em>crab Chaceon maritae</em> off Namibia

    The impact of emigration on population estimates of deep-sea red <em>crab Chaceon maritae</em> off Namibia

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Underwater photography and tag-recapture methods have previously been found to be the most accurate means of assessing the size of the population of Chaceon maritae off southern Africa. However, recent population estimates made by the tag-recapture method appear to be...