Articles by Author: Cd Van Der Lingen

Search results for Cd Van Der Lingen

We found 39 results for you
  1. Essential Oils in the Leaf, Bark and Seed of Mopane (<em>Colophospermum mopane</em>)

    Item type: Journal Article • Journal: South African Forestry Journal
    Essential oils were obtained from the mature leaves, bark and seed of mopane (Colophospermum mopane). Over 50 compounds were detected and the major compound from all three plant sources was found to be α-pinene. The oil from the bark was...
  2. A comparison of condition factor and gonadosomatic index of sardine <em>Sardinops sagax</em> stocks in the northern and southern Benguela upwelling ecosystems, 1984–1999

    A comparison of condition factor and gonadosomatic index of sardine <em>Sardinops sagax</em> stocks in the northern and southern Benguela upwelling ecosystems, 1984–1999

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Time-series of condition factor (CF) and gonadosomatic index (GSI) were generated using general linear models (GLM) for sardine Sardinops sagax stocks in the northern and southern Benguela ecosystems over the period 1984–1999. During this period the biomass of sardine in...
  3. Diet of sardine <em>Sardinops sagax</em> in the southern Benguela upwelling ecosystem

    Diet of sardine <em>Sardinops sagax</em> in the southern Benguela upwelling ecosystem

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The diet of sardine Sardinops sagax in the southern Benguela was investigated by microscopic examination of stomach contents. The relative dietary importance of prey size and prey type was assessed by calculating the carbon content of prey items. Sardine is...
  4. Aspects of the early life history of galjoen <em>Dichistius capensis</em>

    Aspects of the early life history of galjoen <em>Dichistius capensis</em>

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Laboratory experiments were conducted to determine the relationship between temperature and embryonic duration for fertilized galjoen eggs, and to examine the pattern of endogenous food utilization in early galjoen larvae. Embryonic duration decreased with increasing temperature, the relationship being best...
  5. Differential feeding by sardine <em>Sardinops Sagax</em> and anchovy <em>Engraulis capensis</em> recruits in mixed shoals

    Differential feeding by sardine <em>Sardinops Sagax</em> and anchovy <em>Engraulis capensis</em> recruits in mixed shoals

    Item type: Journal Article • Journal: South African Journal of Marine Science
    In a first effort to understand interactions between anchovy Engraulis capensis and sardine Sardinops sagax in the field, the size composition of the diet of these two species from a number of mixed shoals was examined. Although both species consumed...
  6. Gastric evacuation, feeding periodicity and daily ration of sardine <em>Sardinops sagax</em> in the southern Benguela upwelling ecosystem

    Gastric evacuation, feeding periodicity and daily ration of sardine <em>Sardinops sagax</em> in the southern Benguela upwelling ecosystem

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Laboratory and field experiments were conducted to determine gastric evacuation rates of sardine Sardinops sagax, and stomach content analyses were undertaken to assess feeding periodicity and estimate the daily ration of this species in the southern Benguela. Gastric evacuation followed...
  7. Multiple factors affecting South African anchovy recruitment in the spawning, transport and nursery areas

    Multiple factors affecting South African anchovy recruitment in the spawning, transport and nursery areas

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Despite high primary productivity, the yield of pelagic fish in the southern Benguela is relatively low compared to that in the Humboldt system. Part of the constraint may be the ability of pelagic fish to reproduce successfully in a strongly...
  8. Contributions of the Benguela ecology programme to pelagic fisheries management in South Africa

    Contributions of the Benguela ecology programme to pelagic fisheries management in South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    In 1982, the Benguela Ecology Programme (BEP) created a formal, multi-institutional research partnership in South Africa. During the next two decades, the BEP directed many aspects of pelagic ecosystem research in the southern Benguela upwelling region, aiming to improve fisheries...
  9. Estimating the lipid content of pelagic fish in the southern Benguela by visual assessment of their mesenteric fat

    Estimating the lipid content of pelagic fish in the southern Benguela by visual assessment of their mesenteric fat

    Item type: Journal Article • Journal: African Journal of Marine Science
    A technique to estimate the lipid content of anchovy Engraulis encrasicolus and sardine Sardinops sagax using visual assessments of mesenteric fat is described. Anchovy are allocated to one of five and sardine to one of seven fat stages, depending upon...
  10. Stage-dependent vertical distribution of pelagic fish eggs on the western Agulhas Bank, South Africa

    Stage-dependent vertical distribution of pelagic fish eggs on the western Agulhas Bank, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The vertical distributions of eggs of anchovy Engraulis encrasicolus, sardine Sardinops sagax and round herring Etrumeus whiteheadi over the western Agulhas Bank, South Africa, were sampled between 0m and 100m, using an opening-closing WP-2 net, to investigate differences in developmental...