Name: Horse Mackerel Hydroacoustic Pilot Survey on the Africana Voyage 096, October 1991
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.42072024

Title	Horse Mackerel Hydroacoustic Pilot Survey on the Africana Voyage 096, October 1991
Authors	Ian Hampton 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 Horse Mackerel Hydroacoustic Pilot Survey was conducted on the Africana Voyage 096 from 14-28 October 1991. The objectives of the cruise were to test the feasibility of obtaining an acoustic estimate of adult horse mackerel; to assess the ability to determine target detectability, target identification and target strength; to obtain an estimate of horse mackerel abundance in a sub-region. The size of the sub-region were to be determined by the time available and on the results of the first two objectives; to collect biological data pertaining to horse mackerel; to measure currents by means of the Acoustic Doppler Current Profilers (ADCP) in order to: a) test for relationships between horse mackerel movement and near-surface and mid-water currents, and b) to add to the ADCP data base for the South East coast; to measure thermal and salinity structure of the water column using a Conductivity, Temperature, Depth (CTD), and measurement of basic biotic parameters; oxygen, nutrients and chlorophyll; to collect data from the satellite imager on the large-scale influence of the Agulhas current; to obtain a 'snap shot' view of the species diversity and stratification of mesopelagic fish and squids at a point east of the southern Agulhas Bank, in the region of the Agulhas retroflextion.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.42072024 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	14 Oct 1991 – 28 Oct 1991
Geographic extent	North: -33.5 South: -37.5 West: 18.5 East: 27.5
Keywords	Africana, Africana 096, sailing orders
Related resources	Digital objects included in this collection: Processed CTD continuous observations from the Horse Mackerel Hydroacoustic Pilot Survey on the Africana Voyage 096, October 1991 (10.15493/DEA.MIMS.43072024) Processed CTD discrete observations from the Horse Mackerel Hydroacoustic Pilot Survey on the Africana Voyage 096, October 1991 (10.15493/DEA.MIMS.44072024)

Cite 10.15493/DEA.MIMS.42072024

Terms of use