Name: South Coast Demersal Biomass Survey on the Africana Voyage 093, June 1991
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.18072024

Title	South Coast Demersal Biomass Survey on the Africana Voyage 093, June 1991
Authors	David Japp 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: 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 on the Africana Voyage 093 was conducted from 7 June 1991 to 5 July 1991. The main 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 will include five transects extending from specified areas on the South Coast and approximately perpendicular to the coastline outwards towards the mainstream of the Agulhas Current; 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 investigate the extent, effect and diversity of parasitism in demersal fish; to obtain mature live sole for land-based experimental research; to sample hake and potential prey species for 1c:1c and 15N:14N ratios; to sample for squid and other fish eggs and larvae using bongo nets and the collection of the following specific material for land-based research: snoek gut, echinoderms, skates, south coast rock lobster, crabs, sharks and rays and any other unusual specimen.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.18072024 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	07 Jun 1991 – 01 Jul 1991
Geographic extent	North: -33.5 South: -37.0 West: 20.0 East: 27.0
Keywords	Africana, Africana 093, 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 093, June 1991 (10.15493/DEA.MIMS.19072024) Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana voyage 093, June 1991 (10.15493/DEA.MIMS.20072024)

Cite 10.15493/DEA.MIMS.18072024

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