Articles by Author: Se Kerwath

Search results for Se Kerwath

We found 23 results for you
  1. A telemetry experiment on spotted grunter <em>Pomadasys commersonnii</em> in an African estuary

    A telemetry experiment on spotted grunter <em>Pomadasys commersonnii</em> in an African estuary

    Item type: Journal Article • Journal: African Journal of Marine Science
    The feasibility of using telemetry equipment to study the movements of estuarine-associated fish in South Africa was investigated by conducting a tracking experiment on spotted grunter Pomadasys commersonnii in the East Kleinemonde Estuary. The telemetry equipment comprised two VEMCO V8...
  2. A comparative evaluation of three methods used to tag South African linefish

    A comparative evaluation of three methods used to tag South African linefish

    Item type: Journal Article • Journal: African Journal of Marine Science
    Tagging effects and loss rates of 60 Roman Chrysoblephus laticeps tagged with dart tags with barbs (D-tags), T-bar filaments (T-tags) and visible implant fluorescent elastomer (VIFE) tags were investigated. The fish were tagged and monitored in a controlled tank experiment...
  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. First documented southern transatlantic migration of a blue shark <em>Prionace glauca</em> tagged off South Africa

    First documented southern transatlantic migration of a blue shark <em>Prionace glauca</em> tagged off South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The first documented recapture of a South African-tagged juvenile blue shark Prionace glauca off Uruguay lends weight to the hypothesis of a single blue shark population in the South Atlantic. The presence of neonate blue sharks with umbilical scars and...
  5. An alternative method for estimating the status of resident reef fish stocks, based on differential fishing effort across a marine reserve boundary

    An alternative method for estimating the status of resident reef fish stocks, based on differential fishing effort across a marine reserve boundary

    Item type: Journal Article • Journal: African Journal of Marine Science
    The stock status of roman Chrysoblephus laticeps was estimated in the Goukamma, a temperate South African marine protected area (MPA). Standardised catch per unit effort (CPUE) from a controlled angling survey on both sides of the MPA border was employed...
  6. 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...
  7. The effects of barotrauma on five species of South African line-caught fish

    The effects of barotrauma on five species of South African line-caught fish

    Item type: Journal Article • Journal: African Journal of Marine Science
    Management measures for South African line-caught fish include output controls such as closed seasons, bag and size limits and no-take moratoria. The main condition for these measures to be effective is that undesirable catches can be successfully released. However, most...
  8. First tracking of white stumpnose <em>Rhabdosargus globiceps</em> (Sparidae) in a South African marine protected area

    First tracking of white stumpnose <em>Rhabdosargus globiceps</em> (Sparidae) in a South African marine protected area

    Item type: Journal Article • Journal: African Journal of Marine Science
    There is a growing recreational fishery for white stumpnose Rhabdosargus globiceps (Sparidae) in Langebaan Lagoon, part of South Africa's West Coast National Park. The upper reaches of the lagoon are protected from fishing, but the extent to which the closure...
  9. Movement pattern and home range of Roman <em>Chrysoblephus laticeps</em>

    Movement pattern and home range of Roman <em>Chrysoblephus laticeps</em>

    Item type: Journal Article • Journal: African Journal of Marine Science
    The movement behaviour of adult Roman Chrysoblephus laticeps (Sparidae) was investigated using mark-and-recapture techniques in the Goukamma Marine Protected Area (GMPA) and the Tsitsikamma National Park (TNP) on the South African temperate south coast. The study was designed to improve...
  10. Area utilisation and activity patterns of roman <em>Chrysoblephus laticeps</em> (Sparidae) in a small marine protected area

    Area utilisation and activity patterns of roman <em>Chrysoblephus laticeps</em> (Sparidae) in a small marine protected area

    Item type: Journal Article • Journal: African Journal of Marine Science
    Information on the movement of fish is vital to determine the effectiveness of marine protected areas (MPAs) for fish conservation and fisheries management. This study investigates area utilisation and activity patterns of 13 adult roman Chrysoblephus laticeps (Sparidae) using telemetry...