Articles by Keyword: Vulnerable Marine Ecosystems

Search results for Vulnerable Marine Ecosystems

We found 172 results for you
  1. Megabenthos and benthopelagic fishes on Southeast Atlantic seamounts

    Megabenthos and benthopelagic fishes on Southeast Atlantic seamounts

    Item type: Journal Article • Journal: African Journal of Marine Science
    In a descriptive study of megafauna of several Southeast Atlantic seamounts, multiple video-transects on upper slopes and summits documented the occurrence of benthic invertebrate taxa, primarily corals, regarded as indicators of vulnerable marine ecosystems (VMEs) as defined in international guidelines...
  2. Simulations of fishing effects on the southern Benguela fish community using an individual-based model: learning from a comparison with ECOSIM

    Simulations of fishing effects on the southern Benguela fish community using an individual-based model: learning from a comparison with ECOSIM

    Item type: Journal Article • Journal: African Journal of Marine Science
    By applying an individual-based model (OSMOSE) to the southern Benguela ecosystem, a multispecies analysis is proposed, complementary to that provided by the application of ECOPATH/ECOSIM models. To reconstruct marine foodwebs, OSMOSE is based on the hypothesis that predation is a...
  3. Reviewing evidence of marine ecosystem change off South Africa

    Reviewing evidence of marine ecosystem change off South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Recent changes have been observed in South African marine ecosystems. The main pressures on these ecosystems are fishing, climate change, pollution, ocean acidification and mining. The best long-term datasets are for trends in fishing pressures but there are many gaps,...
  4. Optimising stocking rate under commercial and subsistence pastoralism <em>optimisering van veelading by kommersiele en bestaansveeboerdery</em>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Hopes for a single criterion of overstocking are forlorn. Livestock may be kept for any of many purposes, and the stocking rate optimal for one is not necessarily so for another. Conflicts might be resolved by (1) recognising the likely...
  5. Nitrogen mineralization, nitrification and nitrogen balance in laboratory incubation of soil from natural grassland in the central Orange Free State

    Nitrogen mineralization, nitrification and nitrogen balance in laboratory incubation of soil from natural grassland in the central Orange Free State

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Air-dried soil from three layers under grassveld was moistened by the addition of 12 levels of water and incubated for up to two years at five temperatures in screw-capped preserving jars with an air-filled head- space equivalent to seven times...
  6. An overview of the living marine resources of Namibia

    An overview of the living marine resources of Namibia

    Item type: Journal Article • Journal: South African Journal of Marine Science
    This paper gives an overview of the main living marine resources of Namibia. It focuses on the scientific research conducted during the past decade as input to the management of these resources. The distribution and habitats of the most important...
  7. Entanglement of pinnipeds at Marion Island

    Entanglement of pinnipeds at Marion Island

    Item type: Journal Article • Journal: South African Journal of Marine Science
    During the period April 1991–March 1996, 10 entangled Antarctic fur seals Arctocephalus gazella, 28 entangled Subantarctic fur seals A. tropicalis and one entangled southern elephant seal Mirounga leonina were observed at Marion Island, Southern Ocean. Entanglement of fur seals was...
  8. Movement patterns of red steenbras <em>Petrus rupestris</em> tagged and released in the Tsitsikamma National Park, South Africa

    Movement patterns of red steenbras <em>Petrus rupestris</em> tagged and released in the Tsitsikamma National Park, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Movement patterns of red steenbras Petrus rupestris were obtained from fish tagged and released in the Tsitsikamma National Park, South Africa. Of 217 fish tagged, 38 were recaptured. Juveniles (<700 mm FL) were resident, whereas adults (>700 mm FL) migrated...
  9. Nearshore surface current patterns in the Tsitsikamma National Park, South Africa

    Nearshore surface current patterns in the Tsitsikamma National Park, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The pattern of surface currents in the Tsitsikamma National Park, South Africa, was studied with holey-sock drogues released in batches of up to four at a time, from 1996 and 1998. Drogues were left to drift for either 6 or...
  10. The role of the Tsitsikamma National Park in the management of four shore-angling fish along the south-eastern Cape coast of South Africa

    The role of the Tsitsikamma National Park in the management of four shore-angling fish along the south-eastern Cape coast of South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The role of the Tsitsikamma National Park (TNP) in the management of four important shore-angling fish (Diplodus sargus capensis, Diplodus cervinus hottentotus, Pachymetopon grande and Dichistius capensis) was evaluated using data obtained from two independent studies conducted over a similar...