cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15493/dea.mims.17072024
title: Processed CTD discrete observations from the Anchovy Recruitment Survey on the Africana Voyage 092, May 1991

description: Processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 07 May and 24 May 1991, during voyage 092 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa.
description: Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 07 May and 24 May 1991, during voyage 092 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern 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.
description: 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.
DOI: 10.15493/dea.mims.12072024
title: South Coast Demersal Biomass Survey on the Africana Voyage 082, May 1990

description: The South Coast Demersal Biomass Survey on the Africana Voyage 082 was conducted from 23 May - 13 June 1990. The objectives of the cruise were to survey by bottom-trawling the abundance of adult and recruiting hake, sole and other trawl target species; to make experimental bottom-trawls in deep water to establish the limit of hake distribution, and to collect deep-water specimens of fish and squid; to investigate the environment and ecological interrelationships of hake and other demersal species in the various depth strata; to study demersal community relationships; to investigate the occurrence, distribution and abundance of squid and squid larvae; to investigate the occurrence of line fish species in shallow waters; to study the biology of sharks and skates; to study the biology of kob; and to train senior staff and oceanographic research assistants.
DOI: 10.15493/dea.mims.42072024
title: Horse Mackerel Hydroacoustic Pilot Survey on the Africana Voyage 096, October 1991

description: 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.
DOI: 10.15493/dea.mims.24072024
title: West Coast Hake Biomass Survey on the Africana Voyage 084, July 1990

description: The West Coast Hake Biomass Survey was conducted on the Africana Voyage 084 from 12 July - 06 August 1990. The objectives of the cruise were to survey by means of trawling the abundance of adult and recruiting hake in South African waters; to investigate diurnal cycle of hake and other demersal species; to investigate the environmental and ecological interrelationships of hake and other demersal species; to investigate the occurrence, distribution, and abundance of squid; to study the biology of chondrichthyan species; to investigate zooplankton scattering layers and their influence on the feeding and distribution of small hake; to investigate the feasibility of using carbon and nitrogen isotopes for tracing hake diet; to obtain extensive coverage of chlorophyll-fluorescence distribution at the sea surface as part of an ongoing monitoring program; to collect live chaetognaths and medusae for gut evacuation and feeding experiments, and for gut content analysis; and lastly to train oceanographic research assistants.
DOI: 10.15493/dea.mims.45072024
title: Pelagic Fish Biomass Survey on the Africana Voyage 097, November 1991

description: The Pelagic Fish Biomass Survey was conducted on the Africana Voyage 097 from 07 November to 03 December 1991. The objectives of the cruise were to estimate the biomass and population length structure of anchovy, pilchard, and round herring off South Africa by means of echo-integration and midwater trawling; to estimate anchovy biomass by means of the egg production method, and trial estimate pilchard biomass by means of the egg production method; to describe the distribution and behaviour patterns of commercially harvested epi-pelagic and meso-pelagic fish, and the influence of oceanographic variables on these; to collect biological data on reproduction, condition and diet of pelagic fish species; to determine phytoplankton biomass in the nanophytoplankton (<10 µm) and netphytoplankton (>10 µm) size-classes in surface waters; to obtain information on the distribution and abundance of meso-zooplankton; to estimate secondary production rates of adult copepods using the egg production method; to investigate relationships between water temperature, phytoplankton size, phytoplankton biomass, copepod biomass and production, and the distribution of pelagic fish; the examination of feeding ecology and food production selection of pilchard; the retrieval of a current meter mooring off Cape Columbine; and profiling of currents by means of the acoustic doppler current profiler.
DOI: 10.15493/dea.mims.30072024
title: West Coast Hake Biomass Survey on the Africana Voyage 088, January 1991

description: The West Coast Hake Biomass Survey was conducted on the Africana Voyage 088 from 07-29 January 1991. The objectives of the cruise were to survey by means of bottom trawling the abundance of hake and other demersal species on the West Coast of South Africa; to investigate the environmental and ecological interrelationships of hake and other demersal species; to investigate the possible recovery of the stocks of West Coast Sole; to study the biology of chondrichthyan species; to collect material for the electrophoretic comparison of the southern African kingklip, Genypterus capensis, with the Australian G. blacodes and G. microstomus and the South American G. blacodes and G. chilensis; to investigate zooplankton scattering layers and their influence on the feeding behaviour and distribution of small hake; training of Oceanographic Research Assistants;  to investigate the feasibility of using carbon and nitrogen isotopes for tracing hake diet;  to obtain coverage of chlorophyll-fluorescence distribution at the sea surface as part of an ongoing monitoring program; to investigate aspects of the feeding, dynamics and reproduction of zooplankton; and lastly to obtain information on the hydrology and currents of the West Coast.
DOI: 10.15493/dea.mims.33072024
title: Plankton Dynamics on the Africana Voyage 089, February 1991

description: The Plankton Dynamics cruise on the Africana Voyage 089 was conducted from 12-23 February 1991. The objectives of the cruise were to complete a summer transect to provide information on zooplankton vertical migration patterns during the period of maximum upwelling; to contrast hydrological and planktological conditions across the shelf just north of the Columbine divergence, at a time when pelagic fish larvae transported in the jet current were crossing the shelf to the nursery area; to measure rates of primary and secondary production in different size classes of planktonic organisms at offshore (shelf-break), mid shelf and inshore locations; to examine the influence of recent feeding history on the condition of pre-recruit pelagic fish; to measure time-dependent fluctuations in the currents using the acoustic doppler current profiler; and to make measurements of nitrogen dynamics within the planktonic community.
DOI: 10.15493/dea.mims.36072024
title: Pelagic Pre-Recruit Mesopelagic Biomass Survey on the Africana Voyage 090, March 1991

description: The Pelagic Pre-Recruit Mesopelagic Biomass Survey  was conducted on the Africana Voyage 090 from 05-19 March 1991. The objectives of the cruise were to get an estimation of the biomass and population structure of epi-pelagic pre-recruit fish off the West Coast by means of echo-integration and midwater trawling; get an estimation of an epi-pelagic pre-recruit biomass index using quantitative Methot trawls; get an estimation of the biomass and population structure of mesopelagic fish using echo-integration and midwater trawling; to investigate the behaviour of pelagic pre-recruit fish in relation to oceanographic variables; get a collection of biological material for age, oil content, diet and condition studies on pelagic pre-recruits; to determine oxygen concentrations in rock lobster distribution areas; the profiling of currents by means of the acoustic doppler current profiler; and testing the feasibility of the acoustic assessment of juvenile hake.
DOI: 10.15493/dea.mims.48072024
title: Agulhas Bank Boundary Processes on the Africana Voyage 099, January 1992

description: The Agulhas Bank Boundary Processes was conducted on the Africana Voyage 099, from 07-28 January 1992. The objectives of the cruise were to study the entrainment/loss of biota (fish eggs, larvae and plankton) along the shelf and shelf-edge by currents. This was undertaken by means of Acoustic Doppler Current Profilers (ADCP; current) measurements, and regular collection of biota with a combined bongo/calVET net with u³; to estimate the flux of the Agulhas Current along two lines by means of Conductivity, Temperature, Depth (CTD) and Expendable Bathythermograph (XBT) sections, and ADCP measurements; identification of pulses in the Agulhas Current by means of remote sensing (on board) and possible additional CTD/XBT lines to those shown in the grid map. Also a similar study of major filaments on the West Coast; to contribute to studies on the Agulhas Current influence on the South East coast shelf regions, in particular a) the Algoa Bay ecosystem, and b) the St Francis Bay ecosystem (especially the squid fishery), and c) the Eastern Agulhas Bank, South of Mossel Bay; to do a detailed study of the trophic functioning of the planktonic food-web over the entire region, by means of analysis of plankton net tows, on-board incubations, and the use of the Magnum Rosette with fluorometer; estimation of the biomass density and distribution pelagic and mesopelagic fish over the whole region, but particularly above the shelf-edge by means of acoustics and mid-water trawling; two deep midwater trawls on the South West edge of the Agulhas Bank in approximately 1000m of water to investigate species occurrence; and the retrieval of a current meter array off the Tsitsikamma coast at 34°01.35'S; 23° 43.80 'E in 40m of water.
DOI: 10.15493/dea.mims.32072024
title: Processed CTD discrete observations from the West Coast Hake Biomass Survey on the Africana Voyage 088, January 1991

description: Processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 07-29 January 1991, during voyage 088 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa.
description: Here we present processed CTD discrete data from the upcast collected between 07 and 29 January 1991, during voyage 088 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa. 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.
description: 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.
DOI: 10.15493/dea.mims.14072024
title: Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana Voyage 082, May 1990

description: Processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 23 May and 13 June 1990 during Voyage 082 on the FRS Africana, in the Agulhas Current Large Marine Ecosystems Project (ACLME) region on the south coast of Southern Africa.
description: Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 23 May and 13 June 1990, during voyage 082 on the FRS Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) region on the south coast of Southern 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.
description: 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.
DOI: 10.15493/dea.mims.25072024
title: Processed CTD continuous observations from the West Coast Hake Biomass Survey on the Africana Voyage 084, July 1990

description: Processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 12 July and 06 August 1990, during voyage 084 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa.
description: Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 12 July and 06 August 1990, during voyage 084 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern 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.
description: 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.
DOI: 10.15493/dea.mims.31072024
title: Processed CTD continuous observations from the West Coast Hake Biomass Survey on the Africana Voyage 088, January 1991

description: Processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 07-29 January 1991, during voyage 088 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa.
description: Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 07 and 29 January 1991, during voyage 088 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern 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.
description: 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.
DOI: 10.15493/dea.mims.13072024
title: Processed CTD continuous observations from the South Coast Demersal Biomass Survey on the Africana Voyage 082, May 1990

description: Processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 23 May and 13 June 1990, during Voyage 082 on the FRS Africana, in the Agulhas Current Large Marine Ecosystems Project (ACLME) region on the south coast of Southern Africa.
description: Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 23 May and 13 June 1990, during voyage 082 on the FRS Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) region on the south coast of Southern 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. 
description: 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.
DOI: 10.15493/dea.mims.26072024
title: Processed CTD discrete observations from the West Coast Hake Biomass Survey on the Africana Voyage 084, July 1990

description: Processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 12 July and 06 August 1990, during voyage 084 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa.
description: Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 12 July and 06 August 1990, during voyage 084 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern 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.
description: 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.
DOI: 10.15493/dea.mims.37072024
title: Processed CTD continuous observations from the Pelagic Pre-Recruit Mesopelagic Biomass Survey on the Africana Voyage 090, March 1991

description: Processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 05-19 March 1991, during voyage 090 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa.
description: Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 05 and 19 March 1991, during voyage 090 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern 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.
description: 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.