Articles by Author: P Bloomer

Search results for P Bloomer

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  1. Towards predicting recruitment success of anchovy <em>Engrauus capensis</em> Gilchrist in the southern Benguela system using environmental variables: a rule-based model

    Towards predicting recruitment success of anchovy <em>Engrauus capensis</em> Gilchrist in the southern Benguela system using environmental variables: a rule-based model

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The construction of a rule-based model aimed at assisting in the management of the Cape anchovy Engraulis capensis by predicting the success of recruitment is described. Of the many environmental variables which, potentially, may give an indication of future recruitment,...
  2. The effect of sea temperature and food availability on the spawning success of Cape anchovy <em>Engraulis capensis</em> in the southern Benguela

    The effect of sea temperature and food availability on the spawning success of Cape anchovy <em>Engraulis capensis</em> in the southern Benguela

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Data on the thermal structure, copepod biomass and production, and total number of eggs of the Cape anchovy Engraulis capensis were obtained from monthly surveys during the periods August 1993 – March 1994 and September 1994 – March 1995 on...
  3. Forecasting in South African pelagic fisheries management: the use of expert and decision support systems

    Forecasting in South African pelagic fisheries management: the use of expert and decision support systems

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Understanding long-term variability of pelagic fish populations is important in developing forecasting strategies for fisheries management and planning. However, many current fisheries models have only short-term datasets available, whereas those of suitable duration often lack reliability. As resources are placed...
  4. 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...
  5. GENETIC VARIATION BETWEEN FOUR WHITEFISH <em>BARBUS ANDREWI</em> (PISCES: CYPRINI-DAE) POPULATIONS AND POSSIBLE IMPLICATIONS FOR CONSERVATION MANAGEMENT

    GENETIC VARIATION BETWEEN FOUR WHITEFISH <em>BARBUS ANDREWI</em> (PISCES: CYPRINI-DAE) POPULATIONS AND POSSIBLE IMPLICATIONS FOR CONSERVATION MANAGEMENT

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The endemic whitefish, Barbus andrewi, from the Western Cape Province of South Africa is threatened due to the impacts of predatory alien fishes and unsustainable use of its riverine habitat. A study was undertaken to determine the extent of genetic...
  6. Geographic variation in Red Lark <em>Certhilauda burra</em> plumage, morphology, song and mitochondrial DNA haplotypes

    Geographic variation in Red Lark <em>Certhilauda burra</em> plumage, morphology, song and mitochondrial DNA haplotypes

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Ryan, P.G. & Bloomer, P. 1997. Geographic variation in Red Lark Certhilauda burra plumage, morphology, song and mitochondrial DNA haplotypes. Ostrich 68 (1): 31–36.
  7. Ecology and genetics of hybrid zones in the southern African <em>Pycnonotus</em> bulbul species complex

    Ecology and genetics of hybrid zones in the southern African <em>Pycnonotus</em> bulbul species complex

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Lloyd, P., Craig, A.J.F.K., Hulley, P.E., Essop, M.F., Bloomer, P. & Crowe, T.M. 1997. Ecology and genetics of hybrid zones in the southern African Pycnonotus bulbul species complex. Ostrich 68 (2–4): 90–96.
  8. The Karoo Thrush (<em>Turdus smithi</em> Bonaparte 1850), a southern African endemic

    The Karoo Thrush (<em>Turdus smithi</em> Bonaparte 1850), a southern African endemic

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    The Olive Thrush (Turdus olivaceus) species complex is characterised by striking geographical phenotypic variation. Recent consensus has been to recognise three assemblages (1) the olivaceus group restricted to southern Africa, (2) the swynnertoni group of the Zimbabwean and southern Malawi...
  9. Genetic stock structure of white steenbras <em>Lithognathus lithognathus</em> (Cuvier, 1829), an overexploited fishery species in South African waters

    Genetic stock structure of white steenbras <em>Lithognathus lithognathus</em> (Cuvier, 1829), an overexploited fishery species in South African waters

    Item type: Journal Article • Journal: African Journal of Marine Science
    White steenbras Lithognathus lithognathus (Teleostei: Sparidae) is an overexploited marine fish species endemic to South Africa. Overexploitation in recreational, subsistence and commercial fisheries has resulted in stock collapse and the need for improved management of the species. Adults are thought...