Articles by Keyword: Predator Ndash Prey

Search results for Predator Ndash Prey

We found 114 results for you
  1. Rapid colonisation of artificial substrates by macroinvertebrates in a South African lentic environment

    Rapid colonisation of artificial substrates by macroinvertebrates in a South African lentic environment

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Macroinvertebrate colonisation patterns on artificial substrates were investigated in a small reservoir in the Eastern Cape, South Africa. Semi-closed 1 000 cm3 polythene netting cages filled with either brick, gravel, shredded plastic, or equal proportions of these three materials, were...
  2. Do Cape ground squirrels (<em>Xerus inauris</em>) discriminate between olfactory cues in the faeces of predators <em>versus</em> non-predators?

    Do Cape ground squirrels (<em>Xerus inauris</em>) discriminate between olfactory cues in the faeces of predators <em>versus</em> non-predators?

    Item type: Journal Article • Journal: African Zoology
    One way to avoid potential predators is to be sensitive to odour cues, particularly those in faeces and urine, left by predators. This sensitivity has been demonstrated in many solitary, nocturnal, small mammals which may fall victim to ambush predators.We...
  3. Lion predation on elephants in the Savuti, Chobe National Park, Botswana

    Lion predation on elephants in the Savuti, Chobe National Park, Botswana

    Item type: Journal Article • Journal: African Zoology
    Lions rarely prey on elephants. Botswana‘s Savuti lions, however, switch to preying on elephants during the late dry season (August–November), and the frequency of this has increased in the last two decades (1985–2005). An opportunity to document this phenomenon was...
  4. Near-shore distribution of Heaviside’s (<em>Cephalorhynchus heavisidii</em>) and dusky dolphins (<em>Lagenorhynchus obscurus</em>) at the southern limit of their range in South Africa

    Near-shore distribution of Heaviside’s (<em>Cephalorhynchus heavisidii</em>) and dusky dolphins (<em>Lagenorhynchus obscurus</em>) at the southern limit of their range in South Africa

    Item type: Journal Article • Journal: African Zoology
    Photo-identification surveys over three years along 390 km of coastline north of Cape Town, revealed that Heaviside’s dolphin distribution was consistent between years and higher in areas more exposed to swells and with greater long-term availability of small hake Merluccius...
  5. Predatory pelagic fishes of the Bijagós Archipelago (Guinea-Bissau) show high overlap in diets dominated by sardinella

    Predatory pelagic fishes of the Bijagós Archipelago (Guinea-Bissau) show high overlap in diets dominated by sardinella

    Item type: Journal Article • Journal: African Journal of Marine Science
    Knowledge of trophic interactions between the key components of marine communities is required to understand food-web dynamics and develop ecosystem-based management approaches. In West Africa, where fisheries sustain the livelihoods of a significant part of the human population, this understanding...
  6. ON THE RELATIONSHIP BETWEEN TIGERFISH AND SARDINES IN LAKE KARIBA

    ON THE RELATIONSHIP BETWEEN TIGERFISH AND SARDINES IN LAKE KARIBA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    There was a clear relationship in Lake Kariba between the abundance of young-of-the-year (0+) tigerfish and the sardines on which they prey. The abundant sardine population that existed before commercial fishing began accounted for the increase in tiger-fish which occurred...
  7. ON THE RELATIONSHIP BETWEEN TIGERFISH AND SARDINES IN LAKE KARIBA

    ON THE RELATIONSHIP BETWEEN TIGERFISH AND SARDINES IN LAKE KARIBA

    There was a clear relationship in Lake Kariba between the abundance of young-of-the-year (0+) tigerfish and the sardines on which they prey. The abundant sardine population that existed before commercial fishing began accounted for the increase in tiger-fish which occurred...
  8. Consideration of multispecies interactions in the Antarctic: a preliminary model of the minke whale – blue whale – krill interaction

    Consideration of multispecies interactions in the Antarctic: a preliminary model of the minke whale – blue whale – krill interaction

    Item type: Journal Article • Journal: African Journal of Marine Science
    As a first step in investigating the major predator–prey interactions in the Antarctic, a model describing blue whales Balaenoptera musculus, minke whales Balaenoptera acutorostrata and krill Euphausia superba is developed. Blue and minke whales feed mainly on krill, and they...
  9. The diet of the ragged-tooth shark <em>Carcharias taurus</em> Rafinesque 1810 in the Eastern Cape, South Africa

    The diet of the ragged-tooth shark <em>Carcharias taurus</em> Rafinesque 1810 in the Eastern Cape, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The ragged-tooth shark Carcharias taurus is a large predator of inshore coastal waters in the Eastern Cape, South Africa. Born at about 1m long and attaining approximately 3m, stomach content analyses have shown that it feeds largely on teleosts and...
  10. Open-top chamber facility to study air pollution impacts in South Africa. Part II: SO<sub>2</sub>–drought interactions on yield, photosynthesis and symbiotic nitrogen fixation in soybean

    Open-top chamber facility to study air pollution impacts in South Africa. Part II: SO<sub>2</sub>–drought interactions on yield, photosynthesis and symbiotic nitrogen fixation in soybean

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    South Africa has an extremely energy-intensive economy, resulting in substantial air pollution through its coal-fired power stations. Modelled sulphur dioxide (SO2) concentrations on the central Highveld mostly range between 10 and 50 ppb, exceeding 50 ppb in source areas. Well-watered...