Articles by Keyword: Invertebrate Larvae

Search results for Invertebrate Larvae

We found 31 results for you
  1. The ‘suitcase hypothesis’: Can entrainment of meroplankton by eddies provide a pathway for gene flow between Madagascar and KwaZulu-Natal, South Africa?

    The ‘suitcase hypothesis’: Can entrainment of meroplankton by eddies provide a pathway for gene flow between Madagascar and KwaZulu-Natal, South Africa?

    Item type: Journal Article • Journal: African Journal of Marine Science
    Similarities in the marine fauna found off the coasts of southern Madagascar and KwaZulu-Natal Province (KZN), South Africa, led to the development of the ‘suitcase project,’ with the aim of establishing whether eddies that form off southern Madagascar may package...
  2. THE INVERTEBRATE FAUNA AND BIOTIC INDEX VALUE OF WATER QUALITY OF THE GREAT BERG RIVER, WESTERN CAPE

    THE INVERTEBRATE FAUNA AND BIOTIC INDEX VALUE OF WATER QUALITY OF THE GREAT BERG RIVER, WESTERN CAPE

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The invertebrate fauna was sampled at seven localities in the main stream of the Berg River in 1974. These results are discussed and compared with those of Harrison and Elsworth (1958). The results obtained were also used in applying the...
  3. Interaction between Cape hake spawning and the circulation in the northern Benguela upwelling ecosystem

    Interaction between Cape hake spawning and the circulation in the northern Benguela upwelling ecosystem

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Cape hake in Namibian waters are demersal and mesopelagic spawners, spawning peaking offshore between 100 and 400 m deep, depending on local environmental conditions. The cross-shelf circulation, low-oxygen layers and mesoscale gyres are three important environmental factors influencing hake spawning...
  4. THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA

    THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The south-western Cape is currently responsible for 45% of the total annual trout production in South Africa and further expansion of this industry in the region is likely. A preliminary survey of seven trout farms situated on the upper reaches...
  5. INVERTEBRATES IN THE ORANGE RIVER, WITH EMPHASIS ON CONSERVATION AND MANAGEMENT

    INVERTEBRATES IN THE ORANGE RIVER, WITH EMPHASIS ON CONSERVATION AND MANAGEMENT

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Distribution and abundance of aquatic invertebrates in the lower 1800 kilometres of the Orange River is examined in relation to the conservation and management of the Orange River. Data are based on published information and surveys conducted during research into...
  6. Diel and tidal variations in larval fish exchange in the mouth region of the Gamtoos Estuary, South Africa

    Diel and tidal variations in larval fish exchange in the mouth region of the Gamtoos Estuary, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Diel and tidal variations in density of larval fishes were monitored over one neap and one spring tidal cycle in the mouth region of the warm temperate Gamtoos Estuary, South Africa. Data were collected over two 24h periods, using mixed...
  7. Preliminary testing of the Integrated Habitat Assessment System (IHAS) for aquatic macroinvertebrates

    Preliminary testing of the Integrated Habitat Assessment System (IHAS) for aquatic macroinvertebrates

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Preliminary testing of the Integrated Habitat Assessment System (IHAS), a widely-used aquatic macroinvertebrate habitat assessment method in South Africa, was undertaken. Based on the sensitivity of the South African Scoring System (SASS) to biotope availability and assuming that SASS Scores...
  8. Influence of salinity and temperature on the larval development of the crown crab, <em>Hymenosoma orbiculare</em> (Crustacea: Brachyura: Hymenosomatidae)

    Influence of salinity and temperature on the larval development of the crown crab, <em>Hymenosoma orbiculare</em> (Crustacea: Brachyura: Hymenosomatidae)

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Although the crab Hymenosoma orbiculare appears to complete its entire life cycle within estuaries, the salinity and temperature requirements for its successful larval development are not known. The present study therefore evaluated larval response to salinity and temperature in combination...
  9. Validation of the periodicity of growth increment deposition in otoliths from the larval and early juvenile stages of two cyprinids from the Orange–Vaal river system, South Africa

    Validation of the periodicity of growth increment deposition in otoliths from the larval and early juvenile stages of two cyprinids from the Orange–Vaal river system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    This study tested the hypothesis that growth increments in larval largemouth yellowfish Labeobarbus kimberleyensis and smallmouth yellowfish L. aeneus from the Orange–Vaal river system, South Africa, are deposited daily. The periodicity of increment formation was determined by regular sampling and...
  10. Adult Movement and Larval Dispersal of <em> Argyrozona Argyrozona</em> (Pisces: Sparidae) from a Temperate Marine Protected Area

    Adult Movement and Larval Dispersal of <em> Argyrozona Argyrozona</em> (Pisces: Sparidae) from a Temperate Marine Protected Area

    Item type: Journal Article • Journal: African Journal of Marine Science
    Adult emigration and larval dispersal of carpenter Argyrozona argyrozona from the Tsitsikamma National Park (TNP), South Africa, were investigated using mark-recapture data and Acoustic Doppler Current Profiler measurements of currents. Tagging data showed that adult carpenter were mainly resident, with...