Articles by Keyword: Pelagic Fish

Search results for Pelagic Fish

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  1. 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...
  2. St Helena Bay (southern Benguela) then and now: muted climate signals, large human impact

    St Helena Bay (southern Benguela) then and now: muted climate signals, large human impact

    Item type: Journal Article • Journal: African Journal of Marine Science
    The development of suitable reference states for ecosystem-based management requires documentation of changes in structure and functioning of marine ecosystems, including assessment of the relative importance of bottom-up and top-down processes as drivers of change. We used monitoring data available...
  3. A hard-knock life: the foraging ecology of Cape cormorants amidst shifting prey resources and industrial fishing pressure

    A hard-knock life: the foraging ecology of Cape cormorants amidst shifting prey resources and industrial fishing pressure

    Item type: Journal Article • Journal: African Journal of Marine Science
    Once one of the most numerous seabirds of the Benguela upwelling system, the population of Cape cormorants Phalacrocorax capensis has decreased by 60% in the past three decades and the species is listed as Near Threatened. Declines in prey availability...
  4. 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...
  5. Life history traits of <em>Bathyclarias nyasensis</em> (Siluroidei) in Lake Malawi

    Life history traits of <em>Bathyclarias nyasensis</em> (Siluroidei) in Lake Malawi

    Item type: Journal Article • Journal: African Zoology
    Life history traits, including age, growth, reproduction and diet of Bathyclarias nyasensis from Lake Malawi were studied between December 1996 and November 1998. Owing to reabsorp tion of pectoral spines with increasing fish size, and the relatively low number of...
  6. Ocean robotics in support of fisheries research and management

    Ocean robotics in support of fisheries research and management

    Item type: Journal Article • Journal: African Journal of Marine Science
    South Africa’s small-pelagic fishery is a socio-economically important component of the country’s commercial fisheries sector, second in value only to the demersal trawl fishery. Management of this sector relies on infrequent hydro-acoustic surveys, which provide measures of anchovy Engraulis encrasicolus...
  7. Age, growth and natural mortality of blue jack mackerel <em>Trachurus picturatus</em> (Carangidae) from the Canary Islands, Spain (NW Africa)

    Age, growth and natural mortality of blue jack mackerel <em>Trachurus picturatus</em> (Carangidae) from the Canary Islands, Spain (NW Africa)

    Item type: Journal Article • Journal: African Journal of Marine Science
    Status assessment of exploited fish populations is a general requirement to ensure sustainability of fisheries in both global and local contexts. The blue jack mackerel Trachurus picturatus (Bowdich, 1825) remains unassessed in a data-limited fishery in the eastern central Atlantic,...
  8. A CHECKLIST OF THE FISH SPECIES OF THE CROCODILE AND MATLABAS RIVERS (LIMPOPO SYSTEM) OF THE TRANSVAAL

    A CHECKLIST OF THE FISH SPECIES OF THE CROCODILE AND MATLABAS RIVERS (LIMPOPO SYSTEM) OF THE TRANSVAAL

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    This paper reports on the results of a fish distribution survey of the Crocodile and Matlabas Rivers (Limpopo System). Fifteen species are recorded for the first time in the Matlabas River. Seven unlisted species are recorded for the Crocodile River,...
  9. FISH SPECIES IN STEIUTONTEIN DAN, TUGELA-VAAI SYSTEM, SOUTH AFRICA

    FISH SPECIES IN STEIUTONTEIN DAN, TUGELA-VAAI SYSTEM, SOUTH AFRICA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Two alien species and seven indigenous species, including two minnow species, were present in Sterkfontein Dam. Of the larger species, Barbus aeneus and Labco capensis were the dominant in terms of numbers.
  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...