Articles by Author: Tf N Aelig Sje

Search results for Tf N Aelig Sje

We found 16 results for you
  1. Population genetic studies of horse mackerel <em>Trachurus trecae</em> and <em>Trachurus trachurus capensis</em> off Angola

    Population genetic studies of horse mackerel <em>Trachurus trecae</em> and <em>Trachurus trachurus capensis</em> off Angola

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Genetic variability of the Kunene horse mackerel Trachurus trecae and the Cape horse mackerel Trachurus trachurus capensis was examined using starch gel electrophoresis of enzymatic proteins on individuals collected along the Angolan coast. Six polymorphic enzyme loci were found in...
  2. A knowledge base for management of the capital-intensive fishery for small pelagic fish off South Africa

    A knowledge base for management of the capital-intensive fishery for small pelagic fish off South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    As a contribution to South Africa's move towards an ecosystem approach to fisheries management, this study explores the existence of common perceptions about South Africa's pelagic fishery between resource users and scientists. It represents a collaborative research effort of social...
  3. Life-history parameters of white stumpnose <em>Rhabdosargus globiceps</em> (Pisces: Sparidae) in Saldanha Bay, South Africa, with evidence of stock separation

    Life-history parameters of white stumpnose <em>Rhabdosargus globiceps</em> (Pisces: Sparidae) in Saldanha Bay, South Africa, with evidence of stock separation

    Item type: Journal Article • Journal: African Journal of Marine Science
    White stumpnose Rhabdosargus globiceps were sampled over 24 months in Saldanha Bay on the west coast of South Africa. The species is a rudimentary hermaphrodite, with <1% of mature fish having simultaneously developed ovaries and testes. Spawning activity extended from...
  4. Quantifying the degree of protection afforded by a no-take marine reserve on an exploited shark

    Quantifying the degree of protection afforded by a no-take marine reserve on an exploited shark

    Item type: Journal Article • Journal: African Journal of Marine Science
    Sharks have been shown to benefit from the protection of marine protected areas (MPAs). There is, however, little information on the degree of protection by MPAs to shark populations. The movements of individual smoothhound sharks Mustelus mustelus in, and adjacent...
  5. Movements of, and habitat utilisation by, threespot tilapia <em>Oreochromis andersonii</em> (Teleostei: Cichlidae) in the Upper Zambezi River, Namibia

    Movements of, and habitat utilisation by, threespot tilapia <em>Oreochromis andersonii</em> (Teleostei: Cichlidae) in the Upper Zambezi River, Namibia

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Movements of and habitat utilisation by radio-tagged threespot tilapia (body length 25–50cm) were studied in the Upper Zambezi River between 23 November 2000 and 8 May 2001. Although utilising a relatively large stretch of river (average 5.4km) during the study...
  6. Estuarine use by spotted grunter <em>Pomadasys commersonnii</em> in a South African estuary, as determined by acoustic telemetry

    Estuarine use by spotted grunter <em>Pomadasys commersonnii</em> in a South African estuary, as determined by acoustic telemetry

    Item type: Journal Article • Journal: African Journal of Marine Science
    Factors influencing estuarine use and marine excursions by spotted grunter Pomadasys commersonnii in the Great Fish Estuary, South Africa, were studied using manual and automated telemetry methods. In all, 20 individuals, ranging from 362 mm to 698 mm total length...
  7. Estuarine habitat use by juvenile dusky kob <em>Argyrosomus japonicus</em> (Sciaenidae), with implications for management

    Estuarine habitat use by juvenile dusky kob <em>Argyrosomus japonicus</em> (Sciaenidae), with implications for management

    Item type: Journal Article • Journal: African Journal of Marine Science
    The spatial and temporal area-use patterns of estuarine-dependent juvenile dusky kob Argyrosomus japonicus in the Great Fish Estuary, South Africa, were examined using acoustic telemetry. In all, 29 individuals (307–400 mm total length) were surgically equipped with individually coded transmitters...
  8. Fragmented participation in management of the fishery for small pelagic fish in South Africa – inclusion of small-rights holders is a complex matter

    Fragmented participation in management of the fishery for small pelagic fish in South Africa – inclusion of small-rights holders is a complex matter

    Item type: Journal Article • Journal: African Journal of Marine Science
    The reasons why most small-rights holders do not participate in management of the fishery for small pelagic fish (‘small pelagics’) in South Africa, despite legislation and policy encouraging their participation, were analysed. Membership of the Small Pelagics Management Working Group...
  9. Variability in growth of <em>Vachellia nilotica</em> provenances tested in the Sudano-Sahelian zone of Niger

    Variability in growth of <em>Vachellia nilotica</em> provenances tested in the Sudano-Sahelian zone of Niger

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    A provenance trial of Vachellia nilotica (Acacia nilotica) was conducted in Niger in order to assess variability in growth among 10 provenances from Africa (subsp. adstringens from Niger, Senegal and Cameroun) and outside the continent (subsp. indica from Pakistan and...
  10. Movements and habitat utilization of nembwe, <em>Serranochromis robustus</em> (Günther, 1864), in the Upper Zambezi River

    Movements and habitat utilization of nembwe, <em>Serranochromis robustus</em> (Günther, 1864), in the Upper Zambezi River

    Item type: Journal Article • Journal: African Zoology
    Fifteen adult nembwe Serranochromis robustus (Günther, 1864) were tagged with radio transmitters in the Zambezi River, Namibia, from 4–15 November 2000 to record behaviour and outline the implications for fisheries management. The fish were tracked on average every 3.7 days...