Articles by Author: K Hutchings

Search results for K Hutchings

We found 53 results for you
  1. Methods of capture and transfer to the laboratory of wild pelagic fish

    Methods of capture and transfer to the laboratory of wild pelagic fish

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Two successful methods of capturing anchovy, pilchard and other pelagic fish and transporting them to the laboratory are described.
  2. 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...
  3. Catch-and-effort estimates for the gillnet and beach-seine fisheries in the Western Cape, South Africa

    Catch-and-effort estimates for the gillnet and beach-seine fisheries in the Western Cape, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Total catch and effort for the inshore net-fisheries in the Western Cape, South Africa, were estimated by means of face-to-face questionnaire, telephone and access point surveys, analysis of factory records and compulsory catch returns. In most areas, gillnet fishing effort...
  4. Bycatch in the gillnet and beach-seine fisheries in the Western Cape, South Africa, with implications for management

    Bycatch in the gillnet and beach-seine fisheries in the Western Cape, South Africa, with implications for management

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Interview questionnaires and access point surveys were conducted in order to describe and quantify the catch composition of the inshore net-fisheries in the Western Cape, South Africa. A total of 138 562 fish, representing 29 species from 20 families, was...
  5. Socio-economic characteristics of gillnet and beach-seine fishers in the Western Cape, South Africa

    Socio-economic characteristics of gillnet and beach-seine fishers in the Western Cape, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Data collected by questionnaire and telephone surveys conducted during 1998 and 1999 are used to describe the socio-economic characteristics of inshore netfishers in the Western Cape. Approximately two-thirds of netfishers work or have worked in other fishing sectors and a...
  6. Spatial and temporal distribution of chlorophyll in southern African waters as deduced from ship and satellite measurements and their implications for pelagic fisheries

    Spatial and temporal distribution of chlorophyll in southern African waters as deduced from ship and satellite measurements and their implications for pelagic fisheries

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Information is presented on the distribution of chlorophyll a between the Cunene River (18°S), on the border of South West Africa (Namibia) and Angola, and East London (28°E) on the east coast of South Africa. Spectrophotometric measurements of samples collected...
  7. Biological interactions: causes or effects of variability in the Benguela ecosystem?

    Biological interactions: causes or effects of variability in the Benguela ecosystem?

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The open-sea pelagic ecosystem is often thought of as a homogeneous environment allowing little room for biological accommodation between species — hence Hutchinson's "paradox of the plankton". By contrast, intertidal rocky shores are regarded as areas of high variability, both...
  8. The development and decline of phytoplankton blooms in the southern Benguela upwelling system. 2. Nutrient relationships

    The development and decline of phytoplankton blooms in the southern Benguela upwelling system. 2. Nutrient relationships

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Five drogue studies on phytoplankton bloom dynamics in nutrient-rich newly upwelled water in the southern Benguela provided an opportunity to investigate the applicability of Redfield ratios to coastal upwelling regions. Mean atomic ratios of nutrient utilization and oxygen production (ΔP:ΔN:ΔSi:ΔO),...
  9. Physical and biological features across an upwelling front in the southern Benguela

    Physical and biological features across an upwelling front in the southern Benguela

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The upwelling front of the Cape Columbine upwelling centre was intensively studied, physically and biologically, along a repeated transect during December 1984 following a quiescent phase in the upwelling cycle. Three distinct zones were evident, an inshore zone influenced by...