Name: South Coast Demersal Biomass Survey on the Africana Voyage 095, September 1991
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.21072024

Title	South Coast Demersal Biomass Survey on the Africana Voyage 095, September 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 095 was conducted on 12 September 1991 to 3 October 1991. The main objective of the survey was 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 with emphasis on 'inshore' fishing areas for recruitment estimates; 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 out towards the mainstream of the Agulhas Current. A CTD grid in the Cape St Francis area was also done; to do a selected number of midwater 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 do a selected number of deep trawls >500m with midwater and or bottom gear to investigate the depth distribution of hake and other demersal species on the edge of the Agulhas Bank; to conduct routine biological and length frequency sampling of demersal species; to sample squid intensively to establish their distribution and abundance on the South Coast; to test the feasibility of keeping live sole and other demersal species in temporary holding tanks on board go that they can be used for land-based experimental research; to sample for squid and other fish eggs and larvae using bongo nets. Collection of the following specific material for land-based research: snoek gut contents, belman, kob, echinoderms, squid, rocks, south coast rock lobster, crabs, sharks and rays as well as any other unusual specimens.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.21072024 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	12 Sep 1991 – 03 Oct 1991
Geographic extent	North: -33.5 South: -36.0 West: 20.0 East: 27.5
Keywords	Africana, Africana 095, 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 095, September 1991 (10.15493/DEA.MIMS.22072024)

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