Articles by Keyword: Small Water Bodies

Search results for Small Water Bodies

We found 426 results for you
  1. Reproductive biology of a riverine cyprinid, <em>Labeo umbratus</em> (Teleostei: Cyprinidae), in small South African reservoirs

    Reproductive biology of a riverine cyprinid, <em>Labeo umbratus</em> (Teleostei: Cyprinidae), in small South African reservoirs

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The reproductive and recruitment characteristics of moggel, Labeo umbratus, populations were examined in four small South African reservoirs. Reproduction, characterised by an extended spawning season, high fecundity, short incubation time and rapid larval development, appears to be ideally suited to...
  2. Predictor variables for moggel (<em>Labeo umbratus</em>) biomass and production in small South African reservoirs

    Predictor variables for moggel (<em>Labeo umbratus</em>) biomass and production in small South African reservoirs

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The biomass and production of moggel, Labeo umbratus, in five small previously unexploited Eastern Cape reservoirs were estimated and related to environmental conditions. Biomass and production estimates varied widely between the reservoirs. Whilst the production/biomass ratio was not a good...
  3. The life history and fishery potential of <em>Labeo umbratus</em> (Teleostei: Cyprinidae) in five small South African reservoirs

    The life history and fishery potential of <em>Labeo umbratus</em> (Teleostei: Cyprinidae) in five small South African reservoirs

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The life histories of five populations of moggel, Labeo umbratus, inhabiting small Eastern Cape reservoirs were compared and the differences related to environmental parameters. A significant positive correlation between fish growth and chlorophyll a was noted in four cases. In...
  4. Water-body preferences of dominant calanoid copepod species in the Angola-Benguela frontal zone

    Water-body preferences of dominant calanoid copepod species in the Angola-Benguela frontal zone

    Item type: Journal Article • Journal: African Journal of Marine Science
    The distribution of five dominant calanoid copepods was related to different water masses in the Angola-Benguela Front system. Five water bodies were identified by principal component analysis, on the basis of abiotic parameter such as temperature, salinity, dissolved oxygen, phosphate,...
  5. Water quality and plankton dynamics in two small dams in Zimbabwe

    Water quality and plankton dynamics in two small dams in Zimbabwe

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Two small dams on the Munwahuku River was investigated in relation to the influence of hydrology on their water chemistry over the period January 2000–August 2001. The water level of the upper dam fluctuated more than that of the lower...
  6. Fertilising Commercial Forest Species in Southern Africa: Research Progress and Problems (Part 1)

    Item type: Journal Article • Journal: South African Forestry Journal
    Since the inception of forest fertiliser research in Southern Africa in 1926, eight eucalypt, six pine and four acacia species have been tested, encompassing a wide range of sites in summer, winter and uniform rainfall areas. Marked deficiencies of P,...
  7. Cable Yarding in Southern Africa: An Analysis of its Productivity and Possible Procedure for its Improvement

    Item type: Journal Article • Journal: South African Forestry Journal
    The demand for timber in southern Africa is increasing and this is resulting in the afforestation of areas which require cable yarding when harvested. The demand for cable yarders, essentially fixed skylines, is therefore increasing rapidly. Stress is being placed...
  8. The Relationship between Soil Water Status, Rainfall and the Growth of <em>Eucalyptus grandis</em>

    Item type: Journal Article • Journal: South African Forestry Journal
    Available soil water is recognised as the main factor influencing the growth of commercial plantations in southern Africa. This is of strategic importance as successive rotations of demanding species such as Eucalyptus grandis may be depleting the soil water reserves...
  9. The Hydrological Effects of a Wildfire in a Eucalypt Afforested Catchment

    Item type: Journal Article • Journal: South African Forestry Journal
    A high-intensity wildfire through a humid, upland catchment which was partially afforested to Eucalyptus fastigata, markedly increased stormflows and caused high soil losses off the afforested slopes. Total streamflow yield was unchanged but baseflow was reduced after the fire. The...
  10. Analysis of Stable Isotopes of Xylem Water from Plantation Trees in E. Transvaal and Zululand Indicate they Utilised Ground water During Drought of 1992

    Item type: Journal Article • Journal: South African Forestry Journal
    We investigated the stable isotopic signature of xylem sap of mature plantation trees and the associated ground water at sites in Zululand and E. Transvaal. The survey took place mainly during the drought of 1992. Results indicated a range of...