Articles by Author: Bq Mann

Search results for Bq Mann

We found 42 results for you
  1. Problems in implementing improved range management on common lands in Africa: An Australian perspective

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Rangeland/livestock development in Africa is reviewed and lessons learnt from successes and failures are noted. Pastoral communities have developed risk aversion strategies to survive in the harsh environment and fragile ecology of rangeland areas. With advances in infrastructure (transport, water...
  2. An assessment of the recreational fishery in the St Lucia estuarine system, KwaZulu-Natal, South Africa

    An assessment of the recreational fishery in the St Lucia estuarine system, KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    St Lucia is one of the largest estuarine systems in Africa, and attracts thousands of anglers each year. Catchcard data from the National Marine Linefish System for the years 1986–1999 were analysed to determine catch composition, catch per unit effort...
  3. Net photosynthesis and respiration of the red alga <em>Hypnea spicifera</em> in response to changes in temperature and desiccation

    Net photosynthesis and respiration of the red alga <em>Hypnea spicifera</em> in response to changes in temperature and desiccation

    Item type: Journal Article • Journal: South African Journal of Marine Science
    With the aid of a Gilson respirometer, net photosynthesis and respiration were measured in Hypnea spicifera (Suhr) Harv. apud J. Ag. at temperatures of 15, 20, 25 and 30°C under both immersed and emersed conditions. The effects of increasing desiccation...
  4. Physical influences on biological processes: how important are they?

    Physical influences on biological processes: how important are they?

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Physical processes in the ocean influence biological processes at all scales from microns to thousands of kilometres. The viscous boundary layer around phytoplankton limits nutrient uptake; partial relief is obtained by sinking or swimming. During the progress of an upwelling...
  5. Growth characteristics in the otoliths of selected South African sparid fish

    Growth characteristics in the otoliths of selected South African sparid fish

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Growth characteristics in the otoliths of several South African sparid fish (Diplodus sorgus copensis, D. cervinus hottentotus, Chrysoblephus laticeps, Cymotoceps nasutus, Pochymetopon grande, Rhobdosargus holulbi and Sparodon durbonensis) were investigated. The micro-incremental pattern of deposition in the otoliths conformed to...
  6. The status of the South African beach-seine and gill-net fisheries

    The status of the South African beach-seine and gill-net fisheries

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Initial estimates indicate that there are at least 7 000 fishermen active in fisheries using beach-seine and gill nets in South Africa, mostly (86%) along the West and South coasts. Those fishermen utilize 1 373 registered and 458 illegal nets...
  7. Review of the state of marine protected areas in South Africa

    Review of the state of marine protected areas in South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The use of marine protected areas (MPAs) in South Africa should be revised in the light of growing problems related to the over-use of marine resources. No consistent policy has been applied to the establishment and management of MPAs. Existing...
  8. An evaluation of attitudes and responses to monitoring and management measures for the South African boat-based linefishery

    An evaluation of attitudes and responses to monitoring and management measures for the South African boat-based linefishery

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The boat-based linefishery in South African waters was investigated between 1994 and 1996. Methods involved a combination of access point and questionnaire surveys to collect catch and effort data, and to assess responses to management measures by the commercial and...
  9. A survey of the South African shore-angling fishery

    A survey of the South African shore-angling fishery

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Roving creel surveys and aerial surveys of shore-angling were undertaken as part of a national investigation into linefishing in South Africa. Shore patrols utilized a random stratified sampling procedure to collect catch-and-effort data, and a questionnaire provided information on fishing...
  10. An evaluation of participation in and management of the South African spearfishery

    An evaluation of participation in and management of the South African spearfishery

    Item type: Journal Article • Journal: South African Journal of Marine Science
    An evaluation of participation and management of the South African spearfishery was undertaken by analysing spearfishing catch and effort data stored on the National Marine Linefish System (NMLS) and by conducting a creel and questionnaire survey. Results indicated that the...