Name: Processed CTD discrete observations from the Anchovy Recruitment Survey on the Africana Voyage 073, June 1989
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.11622023

Title	Processed CTD discrete observations from the Anchovy Recruitment Survey on the Africana Voyage 073, June 1989
Project	Anchovy Recruitment Survey
Authors	Gavin Tutt Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientific Technician; contact details: email: Gtutt@environment.gov.za Tarron Lamont Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientist; contact details: email: tlamont@environment.gov.za
Publisher	Department of Forestry, Fisheries and the Environment (2023)
Contributors	Contact Person: Gavin Tutt Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientific Technician; contact details: email: gtsglider@gmail.com
Abstract	Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 08 and 22 June 1989 during Voyage 073 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of South Africa. Neil Brown MK3 and MK4 CTD instruments were used to measure pressure, temperature and conductivity through the water column during research and monitoring cruises between 1983 and 2000. The objectives of the Anchovy Recruitment Survey were to assess anchovy recruitment strength in South African waters in order to recommend a final quota for the 1989 RSA anchovy fishing season; to collect data for the determination of the target strength of anchovy and other pelagic and mesopelagic species; to collect data on shoaling behaviour of pelagic fish, specifically anchovy, pilchard and red-eye; to investigate relationships between the distribution of pelagic fish, zooplankton and water temperature; to determine standing stocks of phytoplankton and zooplankton in different regions and to estimate copepod secondary production in these regions through egg-production and moulting rate experiments.
Methods	Neil Brown MK3 and MK4 Conductivity-Temperature-Depth (CTD) instruments were used to measure pressure, temperature and conductivity through the water column during research and monitoring cruises between 1983 and 2000. Temperature was converted from the IPTS-68 scale to the ITS-90 scale, and salinity was computed from conductivity measurements on the 1978 Practical Salinity Scale, according to UNESCO (1991) algorithms. UNESCO (1993) quality control procedures were applied to the data, and obvious erroneous values resulting from problems including electronic spikes, data collection in air, inadequate flow through the conductivity cell, among others, have been removed. Any additional calibrations or corrections have been specified in each data file, where applicable and available.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.11622023 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	09 Jun 1989 – 21 Jun 1989
Geographic extent	Benguela Current Large Marine Ecosystem (BCLME) North: -26.5 South: -35.5 West: 14.5 East: 20.0
Vertical extent	Max: -200.5 m Min: -1.1 m
Keywords	Africana, Africana 073, Conductivity, CTD, Depth, Neil Brown CTD, SOUTH ATLANTIC OCEAN, Temperature
Related resources	This digital object is described by https://unesdoc.unesco.org/ark:/48223/pf0000090489 This digital object is described by https://unesdoc.unesco.org/ark:/48223/pf0000138825 This digital object is new version of Raw CTD discrete observations from the Anchovy Recruitment Survey on the Africana Voyage 073, June 1989 (10.15493/DEA.MIMS.11642023) This digital object is part of Anchovy Recruitment Survey on the Africana Voyage 073, June 1989 (10.15493/DEA.MIMS.11842023)

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