Articles by Author: Vernons Forbes

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  1. Veld management in the communal areas of Ciskei

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Veld management in Ciskei is based predominantly on a communal land tenure system, and livestock is produced under a ‘Group Ranch’ system. Stocking rates are excessively high and consequently veld degradation is severe, resulting in a lowered carrying capacity and...
  2. Effects of a major cyclone on the abundance and larval recruitment of the portunid crab <em>Scylla serrata</em> (Forskal) in the St Lucia Estuary, Natal, South Africa

    Effects of a major cyclone on the abundance and larval recruitment of the portunid crab <em>Scylla serrata</em> (Forskal) in the St Lucia Estuary, Natal, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Population structure and abundance of the portunid crab Scylla serrata (Forskal) in the lower St Lucia Narrows on the north coast of Natal, South Africa, were monitored with box traps for one year before and some six months after cyclone...
  3. Chlorophyll concentrations and suspended particulate loads in St Lucia, a turbid estuary on the east coast of South Africa

    Chlorophyll concentrations and suspended particulate loads in St Lucia, a turbid estuary on the east coast of South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Concentrations of chlorophyll a and suspended particulate concentrations were measured during three lake-wide surveys of St Lucia, a shallow, turbid estuary on the east coast of South Africa. There was no salinity gradient in the system during any of the...
  4. Seasonal changes in the species composition of penaeid prawns on the Tugela Bank, Natal, South Africa

    Seasonal changes in the species composition of penaeid prawns on the Tugela Bank, Natal, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    This study investigated the species composition of different size categories of penaeid prawns collected between 1988 and 1990 from the Tugela Bank off the east coast of South Africa. Penaeus indicus dominated the catches, followed by Metapenaeus monoceros and Penaeus...
  5. The larval fish assemblage at the mouth of the Kosi Estuary, KwaZulu-Natal, South Africa

    The larval fish assemblage at the mouth of the Kosi Estuary, KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The composition of the larval fish assemblage at the mouth of the Kosi Estuary, KwaZulu-Natal, was investigated. Fish larvae were collected from a sample site adjacent to a rocky reef within the estuary, 200 m upstream from the mouth, on...
  6. Allozyme frequencies indicate little geographic variation among stocks of giant tiger prawn <em>Penaeus monodon</em> in the south-west Indian Ocean

    Allozyme frequencies indicate little geographic variation among stocks of giant tiger prawn <em>Penaeus monodon</em> in the south-west Indian Ocean

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The giant tiger prawn Penaeus monodon is an important component of prawn fisheries in the south-west Indian Ocean and the species of choice in prawn mariculture over much of the Indo-Pacific. Allozyme analysis of specimens collected between December 1996 and...
  7. SALINITY, FLOODS AND THE INFAUNAL MACROBENTHIC COMMUNITY OF THE ST LUCIA ESTUARY, KWAZULU-NATAL, SOUTH AFRICA

    SALINITY, FLOODS AND THE INFAUNAL MACROBENTHIC COMMUNITY OF THE ST LUCIA ESTUARY, KWAZULU-NATAL, SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The St Lucia estuary and lake comprise some 80 % of the estuarine area of KwaZulu-Natal. The system is subject to floods and hypersaline conditions, the latter twice exceeding 100 since 1970. The lake is connected to the sea by...
  8. MANAGING THE ST. LUCIA ESTUARY—MESSAGES FROM THE MUD

    MANAGING THE ST. LUCIA ESTUARY—MESSAGES FROM THE MUD

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The infaunal macrobenthic community of the St Lucia estuary has been exposed to natural disturbance in the form of salinity fluctuations arising from floods and hypersaline conditions, and human-induced interference arising from dredging and beam trawling. The responses of the...
  9. Physical determinants of the distribution and abundance of the burrowing ocypodid crab <em>Paratylodiplax blephariskios</em> Stebbing in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa

    Physical determinants of the distribution and abundance of the burrowing ocypodid crab <em>Paratylodiplax blephariskios</em> Stebbing in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The burrowing ocypodid crab, Paratylodiplax blephariskios, is endemic to the southeast coast of southern Africa where it forms an important component of the estuarine benthic fauna in muddy substrata. Two estuaries in KwaZulu-Natal, namely St. Lucia and the Mhlathuze, were...