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230 datasets found Page 1 of 10
DOI: 10.15493/DEA.MIMS.20250406
HF radar sea surface velocity off the South African coast and processed with HYDDOA v.2

This dataset contains sea surface velocity measurements from six High-Frequency (HF) radar stations located along the South African coast, between Mossel Bay in the Western Cape and Port Elizabeth in the Eastern Cape. The HYDDOA v.2 framework is used to process the data, producing high-resolution, quality-controlled velocity fields that are appropriate for research and operational oceanography. The end date of the dataset is dynamic and subject to frequent updates since new data is constantly being retrieved.

DOI: 10.15493/DEA.MIMS.13052026
South African records of azooxanthellate Scleractinians (i.e., stony cold-water corals)

South African azooxanthellate Scleractinia have not been comprehensively reviewed since Boshoff’s 1980 study, despite decades of additional sampling and scattered regional reports. This study updates the country’s coral species inventory by examining museum collections, particularly from the Iziko South African Museum and the Smithsonian Institution, alongside historical imagery, recent survey data, and existing literature. The results increase the known diversity from 77 to 108 species across eleven families, including 28 new national records, three new species, and one newly described genus.

DOI: 10.15493/DEA.MIMS.32042026
South Coast Demersal Biomass Survey on the Africana Voyage 135, April 1996

The South Coast Demersal Biomass Survey was conducted on the Africana Voyage 135 from 10 April to 2 May 1996. The primary objective of the cruise was 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, including five transects extending from specified areas on the South Coast approximately perpendicular to the coastline out towards the main stream of the Agulhas Current, as well as a mini-CTD transect grid in the Cape St Francis area; to conduct routine biological and length frequency sampling of the catch (specifically hake, squid, panga, sole, sharks and rays); to sample the catches for hake sex ratios, gonad stages and frequency of frill on gill; to sample hake from trawls in specific areas for histological...

DOI: 10.15493/DEA.MIMS.34042026
Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana Voyage 135, April 1996

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the downcast collected between 11 April and 29 April 1996 during voyage 135 on the Africana in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.33042026
Processed CTD continuous observations from the South Coast Demersal Biomass Survey on the Africana Voyage 135, April 1996

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 11 April and 29 April 1996, during voyage 135 on the Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.26042026
Pelagic Fish Spawner Biomass Survey on the Africana Voyage 132, November 1995

The Pelagic Fish Spawner Biomass Survey was conducted on the Africana Voyage 132 from 10 November to 4 December 1995. The objectives of the cruise were to estimate the biomass and population length structure of anchovy, pilchard, round herring and horse mackerel off South Africa by means of echo-integration and midwater trawling; the collection of anchovy, pilchard and round herring otoliths for age determination; the estimation of pilchard and, if time permits, anchovy biomass by means of the egg production method; the description of distribution and behaviour patterns of commercially harvested epi-pelagic and meso-pelagic fish, and the influence of oceanographic variables on these; the collection of biological data on reproduction, condition factors and diet of pelagic fish species; the profiling of currents by means of the acoustic doppler current profiler (ADCP) in order to track egg and larval drift; to determine phytoplankton biomass in the nanophytoplankton (<10 μm) and...

DOI: 10.15493/DEA.MIMS.28042026
Processed CTD discrete observations from the Pelagic Fish Spawner Biomass Survey on the Africana Voyage 132, November 1995

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the downcast collected between 13 November and 28 November 1995, during voyage 132 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.27042026
Processed CTD continuous observations from the Pelagic Fish Spawner Biomass Survey on the Africana Voyage 132, November 1995

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 13 November and 28 November 1995, during voyage 132 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.25042026
Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana Voyage 131, September 1995

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the downcast collected between 29 September and 19 October 1995, during voyage 131 on the Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.23042026
South Coast Demersal Biomass Survey on the Africana Voyage 131, September 1995

The South Coast Demersal Biomass Survey was conducted on the Africana Voyage 131 from 28 September to 20 October 1995. The primary objective of the cruise was 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 up to 200m, but biased in terms of number of stations in depths up to 120m; to investigate the hydrology and current profiles of the South Coast and to relate this to the distribution of the major demersal trawl species, including five transects extending from specified areas on the South Coast and approximately perpendicular to the coastline out towards the main stream of the Agulhas Current; to do a selected number of deep bottom trawls, if time allows, to investigate the distribution and abundance of deepwater fauna; to conduct routine biological and length frequency sampling of demersal species; to sample squid intensively to establish their...

DOI: 10.15493/DEA.MIMS.24042026
Processed CTD continuous observations from the South Coast Demersal Biomass Survey on the Africana Voyage 131, September 1995

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 29 September and 19 October 1995, during voyage 131 on the Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) 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. Any additional calibrations or corrections have been specified in each data file, where applicable and available.

DOI: 10.15493/DEA.MIMS.31092025
South Coast Biomass Survey on the Africana Voyage 129, April 1995

The Demersal South Coast Biomass Survey on the Africana Voyage 129 took place from 21 April to 16 May 1995. The cruise surveyed demersal fish stocks and collected hydrological data along the Agulhas Bank, trawling from Cape Agulhas (20°E) eastwards past Port Elizabeth (27°E) to depths of up to 500m. CTD transects extended to the shelf margin and comparative trawl and longline sampling was undertaken in the 'Blues' region of the Agulhas Bank.

DOI: 10.15493/DEA.MIMS.37092025
Processed CTD discrete observations from the Demersal South Coast Biomass Survey on the Africana Voyage 129, April 1995

Here we present processed discrete Conductivity-Temperature-Depth (CTD) continuous data collected between 23 April 1995 and 15 May 1995, during the Demersal South Coast Biomass Survey on the Africana Voyage 129, in the Agulhas Current Large Marine Ecosystem (ACLME) region on the south coast of Southern Africa. The main objective of the cruise was to survey demersal fish stocks and collect hydrological data.

DOI: 10.15493/DEA.MIMS.36092025
Processed CTD continuous observations from the Demersal South Coast Biomass Survey on the Africana Voyage 129, April 1995

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 23 April 1995 and 15 May 1995, during the Demersal South Coast Biomass Survey on the Africana Voyage 129, in the Agulhas Current Large Marine Ecosystem (ACLME) region on the south coast of Southern Africa. The main objective of the cruise was to survey demersal fish stocks and collect hydrological data.

DOI: 10.15493/DEA.MIMS.43042026
Processed CTD discrete observations from the Pelagic Pre-Recruit Survey on the Africana Voyage 143, March 1997

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the downcast collected between 08 March and 25 March 1997, during voyage 143 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.42042026
Processed CTD continuous observations from the Pelagic Pre-Recruit Survey on the Africana Voyage 143, March 1997

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 08 March and 25 March 1997, during voyage 143 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.15822023
Pelagic Fish Spawner Biomass Survey on the Africana Voyage 126, November 1994

The Pelagic Fish Spawner Biomass Survey was conducted on the Africana Voyage 126 from 11 November to 7 December 1994. The principal scientific tasks of this cruise were acoustic surveying whilst underway and frequent ad hoc midwater trawling on pelagic fish targets. Temperature profiles and egg samples were to be collected at 5- or 10-mile stations. On selected transects, zooplankton samples were to be collected with a vertical Bongo haul on station and an oblique Bongo tow out of the station. Temperature, light and fluorescence profiles were to be obtained using the Magnum. In addition, on these transects, the water samples were to be collected at the surface and the fluorescence maximum and live copepods collected by means of a drift net for incubation experiments to determine egg production and moulting rates. CTD casts and ADCP measurements were planned for certain stations during both legs.

DOI: 10.15493/DEA.MIMS.15842023
Processed CTD discrete observations from the Pelagic Fish Spawner Biomass Survey on the Africana Voyage 126, November 1994

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 11 November and 07 December 1994, during Voyage 126 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and in the Agulhas Current Large Marine ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.15832023
Processed CTD continuous observations from the Pelagic Fish Spawner Biomass Survey on the Africana Voyage 126, November 1994

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 11 November and 07 December 1994, during Voyage 126 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.20240821
Raw data collected by Seaglider SG573 off Cape Town for CTD calibration (SeaTrials 2)

The Gliders in the Agulhas (GINA) project is a multi-institutional effort to implement sustained glider observations around South Africa’s coastline to enhance existing regional networks and complement larger international observations systems such as the Ocean Gliders Boundary Ocean Observing Network (BOON). This dataset includes all data collected by Seaglider SG573 during the first GINA deployment in 2018. The Seaglider was set-up to vertically profile the water column between depths of 0 and 1000m. Measurements collected included conductivity (salinity), temperature, depth (CTD), dissolved oxygen, chlorophyll-a fluorescence (proxy for phytoplankton concentration), Photosynthetically Active Radiation (PAR) and two wavelengths of optical back-scattering by particles, Bb(470) and Bb(700) (proxies for particle concentration). In addition, information collected from the Seaglider was used to derive surface and depth averaged currents. This is raw data collected by Seaglider SG573...

DOI: 10.15493/DEA.MIMS.15292023
Long-term observations of hourly bottom temperatures at Sodwana Bay, South Africa

Here we present a collection of raw and processed temperatures from Underwater Temperature Recorders (UTRs) located off Sodwana Bay, South Africa. At selected sites around Southern Africa, UTRs have been used to obtain long-term records of bottom temperatures in the nearshore environment, at depths ranging from 2m to 34m.

DOI: 10.15493/DEA.MIMS.15242023
Long-term observations of hourly bottom temperatures at Xai-Xai, Mozambique

Here we present a collection of raw and processed temperatures from Underwater Temperature Recorders (UTRs) located off Xai-Xai, Mozambique. At selected sites around Southern Africa, UTRs have been used to obtain long-term records of bottom temperatures in the nearshore environment, at depths ranging from 2m to 34m.

DOI: 10.15493/DEA.MIMS.09022026
Behavioural responses of Cape fur seals Arctocephalus pusillus to swim-with-seal tourism activities in the Robberg Marine Protected Area in South Africa

Behavioural changes are often regarded as a key indicator of the effect of human disturbances on animals, and responses are commonly used as indices of disturbances. Tourism is an increasingly common source of disturbance to wild animals, including marine mammals. Swim-with-seals (SWS) tourism is an emerging industry that has grown in countries such as New Zealand, Australia and South Africa. We studied behavioural impacts of SWS in the Robberg Marine Protected Area (Western Cape, South Africa) on the adjacent Cape fur seal Arctocephalus pusillus pusillus colony through a modified Before-After-Control- Impact (BACI) behavioural study designed for simultaneous observations of impact and control sites (site factor) and before, during and after SWS activities (phase factor). Elevated observations were carried out at distances from the sites using sequential photography of the colony to enumerate seals in different behavioural categories, allowing comparisons between sites and between...

DOI: 10.15493/DEA.MIMS.29112024
Short-term observations of currents and sub-surface temperatures on the continental shelf off Port St Johns, along the east coast of South Africa

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 95m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns on the east coast of South Africa.

DOI: 10.15493/DEA.MIMS.37112024
Short-term observations of hourly bottom temperatures on the continental shelf off Port St Johns, along the east coast of South Africa (December 2013 - September 2014)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability of Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 90m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns on the east coast of South Africa. Here we present processed hourly bottom temperatures (85 m) from an ADCP at location PJ (31.73°S; 29.51°E) on the continental shelf off Port St Johns, between December 2013 and September 2014.

230 datasets found Page 1 of 10

Geographic extent

Temporal extent