Name: South Coast Demersal Biomass Survey on the Africana Voyage 111, April 1993
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.40112024

Title	South Coast Demersal Biomass Survey on the Africana Voyage 111, April 1993
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	Contact Person: Tarron Lamont Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE), email: tarron.lamont@gmail.com Contact Person: Gavin Tutt Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE), email: gtsglider@gmail.com
Abstract	The South Coast Biomass Survey on the Africana Voyage 111 was conducted from 15 April 1993 to May 12 1993. The main objectives of the cruise were to conduct a stratified bottom trawl survey to assess the biomass, abundance and distribution of hake, sole, horse mackerel, squid and other trawl species on the Agulhas Bank; 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 points approximately perpendicular to the coastline out towards the shelf edge; a 'mini' CTD ransèct grid in the Cape St Francis area was also completed. To estimate the sex ratios of both hake species and the frequency of gill parasites; to do a selected number of deep bottom trawls (mid-water optional), to investigate the distribution and abundance of deep-water fauna. To conduct routine biological and length frequency sampling of demersal fish species and to sample squid intensively to establish their distribution and abundance on the South Coast. A collection of squid gonads for histological work, to sample for squid and other fish eggs and larvae using bongo nets, collection of rare fish samples and fish identification, to sample skates and other chondrichthyan species. A collection of the following specific material for land-based research: snoek gut contents, white stumpnose, rocks, sharks & rays, crabs and any other unusual specimens and to deploy concrete block anchors in Cape St Francis Bay.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.40112024 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	15 Apr 1993 – 12 May 1993
Geographic extent	North: -33.5 South: -37.0 West: 20.0 East: 27.0
Keywords	Africana, Africana 111, 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 111, April 1993 (10.15493/DEA.MIMS.43112024) Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana Voyage 111, April 1993 (10.15493/DEA.MIMS.44112024)

Cite 10.15493/DEA.MIMS.40112024

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