Articles by Author: L Drapeau

Search results for L Drapeau

We found 9 results for you
  1. Distribution patterns of key fish species of the southern Benguela ecosystem: an approach combining fishery-dependent and fishery-independent data

    Distribution patterns of key fish species of the southern Benguela ecosystem: an approach combining fishery-dependent and fishery-independent data

    Item type: Journal Article • Journal: African Journal of Marine Science
    Within the context of an ecosystem approach for fisheries, there is a need for quantitative information on distributions of key marine species. This information is valuable input for modelling species interactions in the southern Benguela ecosystem. In the present study,...
  2. Quantification and representation of potential spatial interactions in the southern Benguela ecosystem

    Quantification and representation of potential spatial interactions in the southern Benguela ecosystem

    Item type: Journal Article • Journal: African Journal of Marine Science
    This work explores the potential spatial interactions between 13 key commercial species of the southern Benguela ecosystem: sardine Sardinops sagax, anchovy Engraulis encrasicolus, round herring Etrumeus whiteheadi, horse mackerel Trachurus trachurus capensis, chub mackerel Scomber japonicus, chokka squid Loligo vulgaris...
  3. Characterising and comparing the spawning habitats of anchovy <em>Engraulis encrasicolus</em> and sardine <em>Sardinops sagax</em> in the southern Benguela upwelling ecosystem

    Characterising and comparing the spawning habitats of anchovy <em>Engraulis encrasicolus</em> and sardine <em>Sardinops sagax</em> in the southern Benguela upwelling ecosystem

    Item type: Journal Article • Journal: African Journal of Marine Science
    The spawning habitats of anchovy Engraulis encrasicolus and sardine Sardinops sagax in the southern Benguela upwelling ecosystem were characterised by comparing their egg abundances with environmental variables measured concomitantly during two different survey programmes: the South African Sardine and Anchovy...
  4. The food of three seabirds at Latham Island, Tanzania, with observations on foraging by masked boobies <em>Sula dactylatra</em>

    The food of three seabirds at Latham Island, Tanzania, with observations on foraging by masked boobies <em>Sula dactylatra</em>

    Item type: Journal Article • Journal: African Journal of Marine Science
    At Latham Island, Tanzania, in August 2004 and December 2005, flying fish (Exocoetidae) contributed 90% by mass of prey items regurgitated by masked boobies Sula dactylatra. The fish had a mean caudal length of 164mm. Two boobies generally foraged in...
  5. Indicators of sustainable fishing for South African sardine <em>Sardinops sagax</em> and anchovy <em>Engraulis encrasicolus</em>

    Indicators of sustainable fishing for South African sardine <em>Sardinops sagax</em> and anchovy <em>Engraulis encrasicolus</em>

    Item type: Journal Article • Journal: African Journal of Marine Science
    Six indicators were investigated for South African sardine Sardinops sagax and anchovy Engraulis encrasicolus: mean length of catch, length-at-50% maturity, total mortality, exploitation rate, ratio of bycatch, and centre of gravity of commercial catches. Sardine length-at-50% maturity is the most...
  6. Broad-scale distribution patterns of sardine and their predators in relation to remotely sensed environmental conditions during the KwaZulu-Natal sardine run

    Broad-scale distribution patterns of sardine and their predators in relation to remotely sensed environmental conditions during the KwaZulu-Natal sardine run

    Item type: Journal Article • Journal: African Journal of Marine Science
    The annual movement of South African sardine Sardinops sagax up the east coast of South Africa, known as the ‘sardine run’, was investigated using data from aerial surveys for the period 1988–2005 and compared with remotely sensed sea surface temperature...
  7. The KwaZulu-Natal sardine run: shoal distribution in relation to nearshore environmental conditions, 1997–2007

    The KwaZulu-Natal sardine run: shoal distribution in relation to nearshore environmental conditions, 1997–2007

    Item type: Journal Article • Journal: African Journal of Marine Science
    The nearshore presence of sardine Sardinops sagax on the KwaZulu-Natal (KZN) coast was investi-gated using sightings data collected by the KZN Sharks Board from 1997 to 2007. The spatio-temporal distribution of sardine was described in relation to that of their...
  8. Fine-scale spatial variability of different stages of pelagic fish eggs over the western Agulhas Bank, South Africa

    Fine-scale spatial variability of different stages of pelagic fish eggs over the western Agulhas Bank, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Stage-dependent spatial distributions of anchovy Engraulis encrasicolus, sardine Sardinops sagax and round herring Etrumeus whiteheadi eggs over the western Agulhas Bank South Africa were examined from samples collected at a fine-scale (1.8 km) resolution using a continuous underway fish egg...
  9. Do inter-colony differences in Cape fur seal foraging behaviour reflect large-scale changes in the northern Benguela ecosystem?

    Do inter-colony differences in Cape fur seal foraging behaviour reflect large-scale changes in the northern Benguela ecosystem?

    Item type: Journal Article • Journal: African Journal of Marine Science
    The northern Benguela ecosystem adjoining Namibia has undergone considerable changes in recent decades, with reductions and northwards shifts of key prey species that have had severe implications for marine top predator populations. We investigated how such environmental variability may impact...