Articles by Keyword: Predator Ndash Prey Interactions

Search results for Predator Ndash Prey Interactions

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  1. 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...
  2. 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...
  3. Impact of shorebird predation on intertidal macroinvertebrates in a key North African Atlantic wintering site: an experimental approach

    Impact of shorebird predation on intertidal macroinvertebrates in a key North African Atlantic wintering site: an experimental approach

    Item type: Journal Article • Journal: African Journal of Marine Science
    Shorebirds, as migratory aquatic birds and top predators in intertidal ecosystems, can be affected by global environmental changes and escalations in local impacts on coastal lagoons and estuarine trophic networks. Many shorebirds winter in North African Atlantic coastal sites, most...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. Herbaceous plant species richness and composition in moist Midlands Mistbelt Grasslands in KwaZulu-Natal: is there a relationship to veld condition?

    Herbaceous plant species richness and composition in moist Midlands Mistbelt Grasslands in KwaZulu-Natal: is there a relationship to veld condition?

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    This study investigated the relationship between grazing veld condition and herbaceous plant species richness in the moist Midlands Mistbelt Grassland in KwaZulu-Natal. The observed herbaceous plant species richness and composition of 12 sample plots (50 m × 50 m) was...
  9. 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...
  10. 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...