Articles by Keyword: Rate Of Consumption

Search results for Rate Of Consumption

We found 186 results for you
  1. The rate of consumption of bush and grass by goats in a representative <em>acacia karroo</em> savanna community in the Eastern Cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Consumption of browse and grass in a representative Acacia karroo savanna community was measured. Acacia karroo was preferred to grass. It was selected almost exclusively when available at high leaf densities. Grass was consumed in significant amounts only when approximately...
  2. The effects of lead, water hardness and pH on oxygen consumption, plas- ma chlorides and bioaccumulation in the freshwater fish <em>Tilapia sparrmanii</em>

    The effects of lead, water hardness and pH on oxygen consumption, plas- ma chlorides and bioaccumulation in the freshwater fish <em>Tilapia sparrmanii</em>

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Closed system respirometry was performed on captive juvenile Tilapia sparrmanii exposed for 96 hours to a range of Pb-acetate concentrations in hard and soft water to determine the effect of Pb in relation to water hardness and pH. For hard...
  3. Quantitative aspects of oxygen and carbon dioxide exchange through the lungs in <em>Ocypode ceratophthalmus</em> (Crustacea: Decapoda) during rest and exercise in water and air

    Quantitative aspects of oxygen and carbon dioxide exchange through the lungs in <em>Ocypode ceratophthalmus</em> (Crustacea: Decapoda) during rest and exercise in water and air

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Ghost crabs Ocypode ceratophthalmus were exercised in air and water to measure CO2 and O2 exchange rates using the method of instantaneous measurements of oxygen consumption rate (MO2) where applicable. Average heart rate increased from 100 to nearly 400 pulses...
  4. Role of Eucalypt Plantations in Timber Supply and Forest Conservation in Sub-Saharan Africa

    Item type: Journal Article • Journal: South African Forestry Journal
    The role of eucalypt plantations in timber supply and forest conservation in Sub-Saharan Africa was investigated. The annual destruction of 11,5 million ha of tropical forest is highlighted, the various causes indicated and the controversy whether fast-growing plantations and woodlots...
  5. The Response of <em>Ocotea bullata</em> (Lauraceae) to Flooded Conditions

    Item type: Journal Article • Journal: South African Forestry Journal
    The response of Ocotea bullata (Lauraceae), stinkwood, grown under a range of flooded conditions, was studied. Flooding results in chlorosis and shedding of leaves and may end in death if continued for prolonged periods. Die-back is the result of several...
  6. The Blackwood Group System: its relevance for sustainable forest management in the southern Cape

    Item type: Journal Article • Journal: South African Forestry Journal
    The invasion status of Australian blackwood, Acacia melanoxylon, is assessed against its value as a commercial tree in the southern Cape forests. The species was introduced from Australian rain forests and planted extensively in the southern Cape forests since 1909...
  7. Refinement of a model describing forage production, animal production and profitability as a function of bush density in the false thornveld of the eastern cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    An existing model describing the influence of Aeacia karroo density on forage production, animal production and profitability is reviewed and amended to introduce recent research results.
  8. Evaluation of veld potential in east griqualand using beef cattle under two grazing management systems

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Beef production from veld, in the short term, was found to be greater under a continuous grazing system than under a rotational grazing system. Average daily gains decreased from a maximum in late‐spring and the highest three‐year mean value was...
  9. Conservative stocking or maximum profit: A grazing management dilemma?

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Swards in the False Thornveld of the Eastern Cape are generally stocked considerably in excess of the rate currently recommended for maximised production on a sustained basis. Economic analysis of the relationship between stocking rate and production per ha reveals...
  10. Characteristics of fire behaviour in the montane grasslands of natal

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Fire behaviour characteristics were investigated in the montane grasslands of the Natal Drakensberg. The behaviour of experimental fires was measured together with the accompanying biotic and abiotic conditions. Estimates of heat yield, mass of available fuel and forward rate of...