Please note that this is a staging site.
892 datasets found Page 19 of 36
DOI: 10.15493/DEA.MIMS.13112024
Processed CTD continuous observations from the Pelagic Biomass Survey on the Africana Voyage 108, November 1992

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected, between 05 November and 02 December 1992, during voyage 108 on the FRS Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) region on the south coast of Southern Africa and 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.

DOI: 10.15493/DEA.MIMS.12112024
Pelagic Biomass Survey on the Africana Voyage 108, November 1992

The Pelagic Spawner Biomass Survey was conducted on the Africana Voyage 108 from 05 November to 02 December 1992. The objectives of the survey were to get an estimation of the biomass and population length structure of anchovy, pilchard and round herring off South Africa by means of echo-integration and midwater trawling; estimation of anchovy biomass by means of the egg production method, and trial estimation of pilchard biomass by means of the egg production method; description of distribution and behaviour patterns of commercially harvested epi-pelagic and meso-pelagic fish, and the influence of oceanographic variables on these; collection of 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; and lastly to estimate secondary production rates of...

DOI: 10.15493/dea.mims.26052260
Southern Ocean Seasonal Cycle Experiment (SOSCEx) III Winter Cruise on the SA Agulhas II Voyage 016, July 2015

The third Southern Ocean Seasonal Cycle Experiment (SOSCEx) III is a high-resolution full seasonal cycle experiment using integrated observational and modelling platforms. A novel aspect of SOSCEx III is the integrated multi-platform approach, which aims to explore new questions about the climate sensitivity of carbon and ecosystem dynamics in the Southern Ocean and how these processes are parameterized in models. This winter 2015 cruise can be divided into two primary tracks, the GoodHope line, between Cape Town and the ice edge along the Greenwich Meridian, and the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) line, between Cape Town and the Greenwich Meridian, at 34.5 degrees South longitude.

(No DOI)
Raw CTD data from the Pelagic Biomass Survey on the Africana Voyage 290, October 2016

This is raw Conductivity, Temperature, Depth (CTD) data from the Pelagic Biomass Survey on the Africana Voyage 290 from 25 October - 14 December 2016. The cruise operated from Hondeklip Bay to Port St Johns, South Africa.The principal aim of the Pelagic Biomass Surveys is to obtain estimates of the total biomass of anchovy, sardine and west coast round herring and to obtain data on their population length frequency compositions, for input to the operational management procedure (OMP) for making Total Allowable Catch (TAC) recommendations for the following year. The surveys also obtain information on the environment and food regime impacting anchovy, sardine and west coast round herring around the coast, although recent surveys (~2009 onwards) have included much less environmental sampling than earlier years. The survey uses hydro-acoustics to estimate fish density and abundance, and midwater trawling to identify acoustic targets and to obtain length frequency and other biological...

DOI: 10.15493/DEA.MIMS.03592023
South Coast Hake Biomass Survey on the Africana Voyage 063, May 1988

The objective of the cruise was to survey by means of trawling the abundance of adult and recruiting hake, sole and other trawl target species; to investigate the environment and interrelationships of hake and other demersal species in various depth strata; to study demersal community relationships; to investigate the occurence, distribution and abundance of squid; to investigate the occurence of linefish species in shallow waters; and to study the biology of sharks and skates. Oceanographic research assistants were also trained.

DOI: 10.15493/DEA.MIMS.05292023
Processed CTD discrete observations from the South Coast Hake Biomass Survey on the Africana Voyage 063, May 1988

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 10 May and 03 June 1988, during the South Coast Hake Biomass Cruise on the Africana Voyage 063, in the southern part of the Agulhas Current Large Marine Ecosystem (ACLME) on the south coast of South Africa and the southern part of 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 objective of the cruise was to survey by means of trawling the abundance of adult and recruiting hake, sole and other trawl target species; to investigate the environment and interrelationships of hake and other demersal species in various depth strata; to study demersal community relationships; to investigate the occurence, distribution and abundance of squid; to...

DOI: 10.15493/DEA.MIMS.03552023
Anchovy and Pilchard Spawning Stock Survey on the Africana Voyage 057, November 1987

The main objective of the cruise was to determine acoustically the biomass of the pilchard and anchovy spawning stocks between Hondeklip Bay and the eastern end of the Agulhas Bank. Additionally, the relationship between the distribution of pelagic fish, their eggs and the water temperature was investigated, and chemical samples were taken along lines of stations as part of an ongoing investigation with the supply of nutrients to the Agulhas Bank.

DOI: 10.15493/DEA.MIMS.05212023
Processed CTD discrete observations from the Anchovy and Pilchard Spawning Stock Survey on the Africana Voyage 057, November 1987

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 05 November and 30 November 1987, during the Anchovy and Pilchard Spawning Stock Survey on the Africana Voyage 057, in the southern part of the Agulhas Current Large Marine Ecosystem (ACLME) on the south coast of South Africa and the southern part of 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 main objective of the cruise was to determine acoustically the biomass of the pilchard and anchovy spawning stocks between Hondeklip Bay and the eastern end of the Agulhas Bank. Additionally, the relationship between the distribution of pelagic fish, their eggs and the water temperature was investigated, and chemical samples were taken along lines...

DOI: 10.15493/DEA.MIMS.01872023
South Coast Hake Biomass Survey on the Africana Voyage 048, September 1986

The objective of the cruise was to survey by means of trawling the abundance of adult and recruiting hake, sole and other trawl target species; an investigation of the environment and interrelationships of hake and other demersal species in various depth strata; to investigate the occurence, distribution and abundance of squid and squid larvae; and to investigate the occurence of linefish species in shallow waters.

DOI: 10.15493/DEA.MIMS.04352023
Processed CTD discrete observations from the South Coast Hake Biomass Survey on the Africana Voyage 048, September 1986

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 12 September and 03 October 1986, during the South Coast Hake Biomass Cruise on the Africana Voyage 048, in the southern part of the Agulhas Current Large Marine Ecosystem (ACLME) on the south 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 objective of the cruise was to survey by means of trawling the abundance of adult and recruiting hake, sole and other trawl target species; an investigation of the environment and interrelationships of hake and other demersal species in various depth strata; to investigate the occurence, distribution and abundance of squid and squid larvae; and to investigate the occurence of linefish species in shallow waters.

DOI: 10.15493/DEA.MIMS.03632023
Processed CTD discrete observations from the Anchovy Recruitment on the Africana Voyage 047, August 1986

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 04 August and 29 August 1986, during the Pelagic Winter Survey on the Africana Voyage 047, in the southern part of the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of South Africa and in the Agulhas Current Large Marine Ecosystem (ACLME) on the south 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 main objectives of the cruise were a direct assessment of the biomass of adult anchovy and pilchard on the South and East coasts by acoustic survey, supplemented by aerial fish spotting (East Coast only); an acoustic investigation of the distribution and behaviour of other pelagic fish of commercial importance; an investigation of the relationship between anchovy, pilchard and the...

DOI: 10.15493/DEA.MIMS.01852023
Anchovy Recruitment on the Africana Voyage 047, August 1986

The main objectives of the cruise were a direct assessment of the biomass of adult anchovy and pilchard on the South and East coasts by acoustic survey, supplemented by aerial fish spotting (East Coast only); an acoustic investigation of the distribution and behaviour of other pelagic fish of commercial importance; an investigation of the relationship between anchovy, pilchard and the hydrobiological environment, specifically water temperature and plankton distribution; a determination of the extent to which anchovy recruits penetrated onto the South Coast, as follow-up to recruit surveys on the West Coast in May and June (Voyages 44 and 45) and a study of the broad physical and chemical features of the Agulhas Bank and East Coast continental shelf in winter.

DOI: 10.15493/DEA.MIMS.47062025
Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP: SB) cruise on the Algoa Voyage 299, February 2024

Here we present the 6-second resolution processed TSG data collected between 13 February 2024 and 22 February 2024, during Voyage 299 on the Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.14852023
Commissioning of EIVA ScanFish on the Algoa Voyage 298, January 2024

In November 2018, the EIVA ScanFish III undulator and winch system was acquired, equipped with multiple physical and chemical sensors for real-time data collection. Initial commissioning and training trials were conducted aboard Algoa in December 2018 (ALG256). However, due to instrument damage, these trials were not fully completed. After repairs, additional commissioning trials were carried out during Algoa Voyage 298 in January 2024 to ensure full functionality and operational reliability of the system.

DOI: 10.15493/DEA.MIMS.15042025
Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 298, January 2024

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 22 January and 26 January 2024, during voyage 298 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.14862023
Deployment of acoustic listening moorings on the Algoa Voyage 297, January 2024

South Africa’s developing Oceans Economy Master Plan has increased the range, extent, and intensity of anthropogenic pressures on marine and coastal biodiversity. Activities such as offshore oil and gas exploration, marine transport, small harbour and infrastructure development, and marine tourism have led to elevated noise levels in the ocean and coastal environment. These increased noise levels may negatively impact marine biodiversity and ecosystem services, yet their effects are not yet fully quantified for South Africa's marine regions. To address this, a study was conducted on Algoa Voyage 297 in January 2024, deploying three acoustic recorders along the west coast of South Africa to capture long-term recordings of the marine soundscape. Deployment locations included Namaqualand MPA, Childs Bank MPA, and offshore of the Orange River, aiming to characterise the marine soundscape and assess its impact on marine biodiversity and ecosystem health.

DOI: 10.15493/DEA.MIMS.13042025
Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 297, January 2024

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 12 January and 17 January 2024, during voyage 297 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.17042024
South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line cruise on the Algoa Voyage 295, September 2023

The South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line in the South-East Atlantic Ocean was conducted on the Algoa Voyage 295 from 18 September 2023 to 08 October 2023. The cruise operated from Slangkop, off Cape Town, westwards to 0° E, in the South Atlantic Ocean along the SAMBA transect. The objectives of the cruise were to recover,service and re-deploy ten (10) Pressure Inverted Echosounders (PIES); complete 37 Conductivity, Temperature, Depth (CTD) full depth casts (using the containerised winch) along the SAMBA transect; undertake Chlorophyll and Oxygen sampling at CTD stations and underway along SAMBA transect; undertake microbial and Genomics sampling at CTD stations; collect underway Thermosalinograph (TSG); Surface Photosynthetically Active Radiation (SPAR) and Ship-mounted Acoustic Doppler Current Profilers (S-ADCP) data and provide training to newly employed Department of Forestry, Fisheries and the Environment (DFFE) personnel...

DOI: 10.15493/DEA.MIMS.13502023
Processed underway Thermosalinograph (TSG) observations from the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) on Algoa Voyage 295, September 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 18 September 2023 and 08 October 2023 during the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) cruise on the RS Algoa Voyage 295. A SeaBird SBE45 TSG is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.14822023
Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 293, August 2023

The Integrated Ecosystem Programme: Southern Benguela (IEP:SB) was conducted on the Algoa Voyage 293 in August 2023. This programme serves as a multi-disciplinary and multi-institutional platform aimed at conducting scientific research in the Southern Benguela region. It also fosters collaboration and knowledge exchange. The primary objective is to develop ecosystem indicators—physical, chemical, planktonic, microbial, seabird, and benthic—that can be utilised for effective monitoring and ecosystem-based management.

DOI: 10.15493/DEA.MIMS.11042025
Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 293, August 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 15 August and 22 August 2023, during voyage 293 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.10602023
Processed underway Thermosalinograph (TSG) observations from the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line cruise on the Algoa Voyage 291, March 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 01 March and 09 March 2023 during the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line cruise on the RS Algoa Voyage 291. A SeaBird SBE45 TSG is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C). The cruise operated from Slangkop, off Cape Town, westwards to 15° E, in the South Atlantic Ocean along the SAMBA transect. The objectives of the cruise...

DOI: 10.15493/DEA.MIMS.11482023
South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line on the Algoa Voyage 291, March 2023

The South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line in the South-East Atlantic Ocean was conducted on the RS Algoa Voyage 291 from 01 March to 09 March 2023. The cruise operated from Slangkop, off Cape Town, westwards to 15° E, in the South Atlantic Ocean along the SAMBA transect. The objectives of the cruise were to deploy two Acoustic Doppler Current Profiler (ADCP) moorings (M3 & M4) along the Integrated Ecosystem Programme (IEP)’s Scarborough Monitoring line to collect current data on the Benguela Jet Current; deploy four tall moorings on the SAMBA transect (M7; M8; M9 & M10), incorporating ADCP’s and Sea-Bird Microcats; complete Conductivity, Temperature, Depth (CTD) casts (using the hydrographic winch), before each mooring deployment,for the calibration of the SeaBird microcats mounted on the moorings; collect underway Thermosalinograph (TSG); Surface Photosynthetically Active Radiation (SPAR); Underway PCO2 and Ship-mounted Acoustic...

DOI: 10.15493/DEA.MIMS.45062025
Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP: SB) cruise on the Algoa Voyage 288, December 2022

Here we present the 6-second resolution processed TSG data collected between 05 December 2022 and 09 December 2022, during Voyage 288 on the Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.10582023
Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP: SB) on the Algoa Voyage 287, November 2022

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 21 November and 30 November 2022 during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the RS Algoa Voyage 287. A SeaBird SBE45 TSG is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C). This is a long-term monitoring line conducted off the coast of Kleinsee, Namaqualand, Elands/St Helena Bay and Scarborough on the west coast of South Africa. The IEP:SB in 2013...

892 datasets found Page 19 of 36

Geographic extent

Temporal extent