Name: West Coast Hake Biomass on the Africana Voyage 079, January 1990
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.11892023

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) Cite 10.15493/DEA.MIMS.11892023 Style Terms of use These data are made available with the express understanding that any such use will properly acknowledge the originator(s) and publisher and cite the accession numbers and/or associated Digital Object Identifiers. Anyone wishing to use these data should properly cite and attribute the data providers listed as authors in the metadata provided with each dataset. It is expected that all the conditions of the data license will be strictly honoured. Use of any material herein should be properly cited using the dataset’s persistent identifiers such as accession numbers and DOIs. I agree to the terms of use
Temporal extent	04 Jan 1990 – 29 Jan 1990
Geographic extent	North: -28.5 South: -36.0 West: 14.0 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) Raw CTD continuous observations from the West Coast Hake Biomass on the Africana Voyage 079, January 1990 (10.15493/DEA.MIMS.11792023) Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana Voyage 095, September 1991 (10.15493/DEA.MIMS.23072024)

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