Articles by Keyword: Seasonal Variation

Search results for Seasonal Variation

We found 144 results for you
  1. Micropropagation <em>of Eucalyptus radiata ssp. radiata</em> Using Explants from Mature and Coppice Material

    Item type: Journal Article • Journal: South African Forestry Journal
    Nodes from young field-grown coppice regrowth and branches of a mature tree of Eucalyptus radiata ssp. radiata were cultured on a MS medium containing BA and NAA. BA at 0,5 mg/ℓ and NAA at 0,01-0,1 mg/ℓ were most effective in...
  2. THE LIMNOLOGY OF SOME SOUTH AFRICAN IMPOUNDMENTS I. THE PHYSICO-CHEMICAL LIMNOLOGY OF HARTBEESPOORT DAM

    THE LIMNOLOGY OF SOME SOUTH AFRICAN IMPOUNDMENTS I. THE PHYSICO-CHEMICAL LIMNOLOGY OF HARTBEESPOORT DAM

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Hartbeespoort Dam is a eutrophic, warm monomictic lake with overturn occurring in April. The lake is stratified for about six months of the year and in late summer the stratification appears stable. Light penetration in the dam depends both on...
  3. SOME ASPECTS OF THE DISTRIBUTION OF REACTIVE PHOSPHORUS IN LAKE McILWAINE, RHODESIA: PHOSPHORUS LOADING AND SEASONAL RESPONSES

    SOME ASPECTS OF THE DISTRIBUTION OF REACTIVE PHOSPHORUS IN LAKE McILWAINE, RHODESIA: PHOSPHORUS LOADING AND SEASONAL RESPONSES

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Between November 1976 and September 1977, samples were taken on a fortnightly basis from a representative station in Lake McIlwaine. In addition an intensive study of the riverine input of reactive phosphorus was conducted. Samples were analysed for total reactive...
  4. Preliminary results of a stocking rate trial in Lesotho

    Preliminary results of a stocking rate trial in Lesotho

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Forage responses to stocking rates and seasons were determined over a one-year period. The experimental design consisted of three stocking rates namely, light (2.0ha LSU-1), moderate (1.25ha LSU-1) and heavy (0.5ha LSU-1) and four seasons (autumn, winter, spring and summer)...
  5. Seasonal botanical and chemical composition of sheep and goat diets on a common range in eastern Africa

    Seasonal botanical and chemical composition of sheep and goat diets on a common range in eastern Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The botanical and chemical composition, intake and digestibility of local sheep (Ovis aries) and goat (Capra hirtus) diets were evaluated over the wet (growing) and dry (dormant) seasons. Diet botanical composition was related to the vegetation composition on the range...
  6. Feeding dynamics of Palaemon peringueyi (Decapoda, Caridea) in the temporarily open/closed Kasouga Estuary, South Africa

    Feeding dynamics of Palaemon peringueyi (Decapoda, Caridea) in the temporarily open/closed Kasouga Estuary, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The feeding ecology of the caridean shrimp Palaemon peringueyi in the temporarily open/closed Kasouga Estuary, Eastern Cape, was examined during summer and winter employing stomach fullness index (SFI) analysis. Mean SFI values for male and female shrimp during summer ranged...
  7. Seasonal Changes in Foliar Nutrient Content of <em>E. grandis</em>

    Item type: Journal Article • Journal: South African Forestry Journal
    The monthly variations in the concentrations of six macro- and four micro-nutrients in the foliage of Eucalyptus grandis were studied at three different sites for a period of two years, when the trees were between one and three years of...
  8. Distribution patterns of striped mullet <em>Mugil cephalus</em> in mangrove creeks, Zanzibar, Tanzania

    Distribution patterns of striped mullet <em>Mugil cephalus</em> in mangrove creeks, Zanzibar, Tanzania

    Item type: Journal Article • Journal: African Journal of Marine Science
    Spatial and seasonal variations in density of striped mullet Mugil cephalus were investigated in four mangrove creeks in Zanzibar, Tanzania, during a one-year cycle. Fish were collected monthly in the lower, intermediate and upper reaches of each creek using a...
  9. Buoyancy-stirring interactions in a subtropical embayment: a synthesis of measurements and model simulations in Maputo Bay, Mozambique

    Buoyancy-stirring interactions in a subtropical embayment: a synthesis of measurements and model simulations in Maputo Bay, Mozambique

    Item type: Journal Article • Journal: African Journal of Marine Science
    Maputo Bay, on the coast of Mozambique, is a tidally energetic, subtropical embayment in a region subjected to strong seasonal rainfall. Data from moored current meters, tide gauges and monthly bay-wide surveys were used to characterise the evolution of the...
  10. Variation in benthic macroinvertebrate assemblages in Ologe Lagoon, Nigeria

    Variation in benthic macroinvertebrate assemblages in Ologe Lagoon, Nigeria

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The community structure, diversity and seasonal variation of the benthic macroinvertebrates in Ologe Lagoon were studied at four sites during the dry and wet seasons of 2003 to provide environmental baseline data for the lagoon. The community comprised 29 taxa...