Name: South Coast Demersal Biomass Survey on the Africana Voyage 102, April 1992
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.57072024

Title	South Coast Demersal Biomass Survey on the Africana Voyage 102, April 1992
Authors	Johan Augustyn Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE), South Africa
Publisher	Department of Forestry, Fisheries and the Environment (2024)
Contributors	Project Leader: Gavin Tutt Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE), email: gtsglider@gmail.com Project Leader: Tarron Lamont Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE), email: tarron.lamont@gmail.com
Abstract	The South Coast Demersal Biomass Survey was conducted on the Africana Voyage 102 from 31 March to 21 April 1992. The objectives of the cruise were to conduct a random stratified bottom trawl survey to assess the biomass, abundance, and distribution of hake, sole, horse mackerel, squid and other trawl species; to investigate the hydrology and current profiles of the South Coast and to relate this to the distribution of the major demersal trawl species. This included five transects extending from specified areas on the South Coast and approximately perpendicular to the coastline outwards toward the main stream of the Agulhas Current; to survey acoustically the major squid spawning grounds to determine the extent of aggregation of squid shoals at the time of the year; to do a selected number of mid-water trawls to test for the abundance of kingklip and hake and other demersal species as close as possible to the bottom and in midwater over grounds normally inaccessible to bottom trawl gear; to conduct routine biological sampling of the main demersal species; to sample squid intensively to establish their distribution and abundance on the South Coast; to collect shells and other marine organisms for the Mossel Bay Museum; to obtain mature live sole for land-based experimental research and sole ovaries for histological analysis; to collect sharks and rays for the South African Museum; to sample for squid and other fish eggs and larvae using bongo nets; to collect and identify fish species as well as collect unusual specimens for taxonomic work; to do seal observations; and to collect the following specific material for land-based research: Snoek gut contents, Kob, Rocks, South Coast rock lobster, crabs, and any other unusual specimens, echinoderms, mackerel and myctophiids.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.57072024 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	31 Mar 1992 – 21 Apr 1992
Geographic extent	North: -33.5 South: -37.0 West: 20.0 East: 27.5
Keywords	Africana, Africana 102, cruise report, sailing orders
Related resources	Digital objects included in this collection: Processed CTD continuous observations from the South Coast Demersal Biomass Survey on the Africana Voyage 102, April 1992 (10.15493/DEA.MIMS.58072024) Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana Voyage 102, April 1992 (10.15493/DEA.MIMS.59072024)

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