Articles by Author: Cl Griffiths

Search results for Cl Griffiths

We found 95 results for you
  1. The performance of beef cows on <em>Digitaria eriantha</em> silage

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Digitaria eriantha silage, ensiled when the plants were in the late flowering stage (March), was fed ad lib to mature, non‐pregnant, dry Hereford cows from mid‐May to mid‐September. The average daily gain during a 98‐day feeding period was 0,35 kg/cow...
  2. Long-term trends in catch and effort of commercial linefish off South Africa's Cape Province: snapshots of the 20<sub>th</sub> century

    Long-term trends in catch and effort of commercial linefish off South Africa's Cape Province: snapshots of the 20<sub>th</sub> century

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The Cape commercial linefishery, established during the first half of the 19th century, currently consists of about 2 500 vessels (±20 000 crew), which land some 15 500 tons of fish each year. In spite of a long history, a...
  3. Life history of white stumpnose <em>Rhabdosargus globiceps</em> (Pisces: Sparidae) off South Africa

    Life history of white stumpnose <em>Rhabdosargus globiceps</em> (Pisces: Sparidae) off South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Fishery-dependent and fishery-independent distribution analyses together reveal four discrete areas of white stumpnose Rhabdosargus globiceps abundance between Port Nolloth and the Kei River off the Cape Province of South Africa: the Western Cape (Saldanha Bay), the South-Western Cape, the Southern...
  4. Aspects of the population biology of <em>Octopus vulgaris</em> in False Bay, South Africa

    Aspects of the population biology of <em>Octopus vulgaris</em> in False Bay, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The population biology of the octopus Octopus vulgaris was studied from specimens collected by SCUBA in False Bay, South Africa, between 1997 and 1998. In all, 83% of the specimens collected were found in shelter. Small octopuses were more active...
  5. A preliminary study of age and growth of the monkfish <em>Lophius upsicephalus</em> (Pisces: Lophiidae) on the Agulhas Bank, South Africa

    A preliminary study of age and growth of the monkfish <em>Lophius upsicephalus</em> (Pisces: Lophiidae) on the Agulhas Bank, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The sagittal otoliths of Lophius upsicephalus, although extremely variable in shape, were found to be the only structures suitable for age estimation. The annuli are multi-ringed zones separated by "wider than normal" opaque zones. They are difficult to interpret, especially...
  6. Aspects of the biology of galjoen <em>Coracinus capensis</em> (Cuvier) off the South-Western Cape, South Africa

    Aspects of the biology of galjoen <em>Coracinus capensis</em> (Cuvier) off the South-Western Cape, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Various aspects of the biology of galjoen, an important shore-angling fish along much of the southern African coast, are described from samples collected between February 1984 and July 1985. Galjoen live in shallow, often very turbulent, waters where they feed...
  7. Diet of the South African abalone <em>Haliotis midae</em>

    Diet of the South African abalone <em>Haliotis midae</em>

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The crop and stomach contents of Haliotis midae were determined at two study sites (on the south-western and western Cape coasts) in both summer and winter. A total of 18 species of algae was recorded in the diet, the most...
  8. Consumption, absorption efficiency, respiration and excretion in the South African abalone <em>Haliotis midae</em>

    Consumption, absorption efficiency, respiration and excretion in the South African abalone <em>Haliotis midae</em>

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Feeding periodicity, consumption rate, absorption efficiency, respiration rate and ammonia excretion were measured as functions of wet body mass in abalone collected from the western and southern Cape coasts. A well developed diel feeding rhythm was evident, consumption being restricted...
  9. A model describing the interactive roles of predation, competition and tidal elevation in structuring mussel populations

    A model describing the interactive roles of predation, competition and tidal elevation in structuring mussel populations

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The black mussel Choromytilus meridionalis can survive when exposed in air up to 50 per cent of the time, but it is normally restricted to about 30 per cent exposure by extremes of temperature and desiccation. Growth rates vary greatly...
  10. Distribution, population structure and biology of stomatopod Crustacea off the west coast of South Africa

    Distribution, population structure and biology of stomatopod Crustacea off the west coast of South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Stomatopods recovered during two trawling surveys off the west coast of South Africa during July 1985 and January 1986 consisted exclusively of the endemic subspecies Pterygosquilla armata capensis. The population was concentrated along a narrow inshore strip, in water >...