Title West Coast Hake Biomass on the Africana Voyage 079, January 1990
Authors

Awie Badenhorst
Oceans and Coastal Research, Department of Environment, Forestry and Fisheries (DFFE), South Africa

Publisher Department of Forestry, Fisheries and the Environment (2024)
Contributors

Project Leader: Tarron Lamont
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE), email: tarron.lamont@gmail.com

Project Leader: Gavin Tutt
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE), email: gtsglider@gmail.com

Abstract The West Coast Hake Biomass Survey on the Africana Voyage 079 was conducted from 4 to 29 January 1990. The objectives of the cruise were to survey by means of trawling the abundance of adult and recruiting hake in South African waters, to investigate the diurnal cycle of hake and other demersal species, to investigate the environmental and ecological interrelationships of hake and other demersal species, to make some experimental trawls in deep water to determine hake distribution limits and collect deep-water specimens of fish and squid; to collect routine biological material on demersal species from Namibian waters (if time permitted); to investigate the occurence, distribution and abundance of squid and squid larvae; to study demersal community interrelationships; to study the biology of sharks and selected non-commercial fish species; to investigate zooplankton scattering layers and their influence on the feeding behaviour of small hake; to obtain coverage of chlorophyll-fluorescence distribution at the sea surface as part of an ongoing monitoring programme; to collect data concerning currents on the South African shelf region from as close to the surface to as close to the bottom as possible; and lastly to train oceanographic research assistants.
Data
Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
Temporal extent 04 Jan 1990 – 29 Jan 1990
Geographic extent

North: -28.5
South: -36.0
West: 14.5
East: 20.0

Keywords Africana, Africana 079, cruise report, sailing orders
Related resources
  • Digital objects included in this collection:
    • Processed CTD continuous observations from the West Coast Hake Biomass on the Africana Voyage 079, January 1990 (10.15493/DEA.MIMS.11772023)
    • Processed CTD discrete observations from the West Coast Hake Biomass on the Africana Voyage 079, January 1990 (10.15493/DEA.MIMS.11782023)