739 datasets found Page 27 of 30
DOI: 10.15493/DEA.MIMS.14892023
South Coast Inshore Demersal Biomass and Horse Mackerel Acoustic Survey on the Africana Voyage 116, September 1993

The South Coast Inshore Demersal Biomass and Horse Mackerel Acoustic Survey was conducted on the Africana Voyage 116 from 1 to 30 September 1993. 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.

(No DOI)
Raw SDS data from the Walters Shoal Cruise on Algoa Voyage 207, May 2014

This is Scientific Data System (SDS) data collected on the Walters Shoal Cruise on Algoa Voyage 207, 15 May to 11 June 2014. The purpose of this cruise was to survey the oceanographic conditions and plankton distributions around Walter Shoal seamount, from beyond the 1000m contour line across the plateau.

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.20210408
South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) cruise on the Algoa Voyage 269, September - October 2020

Servicing and re-deployment of scientific equipment along the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line in the South-East Atlantic Ocean. Algoa Voyage 269 operated from Slangkop, off Cape Town, westwards to 11° E, in the South Atlantic Ocean along the SAMBA transect and south of Hondeklipbaai on the West coast, between 21 September 2020 and 16 October 2020.

DOI: 10.15493/DEA.MIMS.07502023
West Coast Whale Cruise - In-depth sampling of humpback whale feeding super-groups on the Algoa Voyage 254, November 2018

The West Coast Whale Cruise was conducted on the Algoa Voyage 254 between 1 and 14 November 2018. The cruise operated between the shelf, slope and offshore regions (<2000m depth) off the west coast of South Africa, between Cape Point (-34.36.111, 18.38064) and Groenriviermond (-30.8277, 17.52061). This cruise was undertaken for data collection as part of a collaborative project led by the Department of Environmental Affairs (DEA) in collaboration with the Whale Unit, Mammal Research Institute of the University of Pretoria, Department of Agriculture, Forestry and Fisheries (DAFF), National Oceanic and Atmospheric Administration (USA), Aqualie Institute (Brazil) and Oregon State University (USA). The greater programme is titled 'Large whale research - genetic relatedness, stock identification, abundance, feeding and migratory behaviours' and has two components, the east coast and west coast components. This cruise focused on the west coast humpback whales.

DOI: 10.15493/dea.mims.26052317
Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on Algoa Voyage 246, February 2018

First look at data from a survey of West Coast of South Africa, Algoa Voyage 246, as part of the Integrated Ecosystem Programme.

DOI: 10.15493/dea.mims.26500007
Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 262, August 2019

The Integrated Ecosystem Programme: Southern Benguela (IEP:SB) was conducted on the Algoa Voyage 262, August 2019. Multi-disciplinary, multi-institutional platform to undertake relevant science in the Southern Benguela; also functioning as a platform for collaboration and learning. All projects aim to develop an ecosystem indicator that can be used to effectively monitor and understand the Southern Benguela i.e physical, chemical, planktonic, microbial, seabird and benthic ecosystem indicators, used for ecosystem-based management.

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.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.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.

(No DOI)
Pre-processed SADCP data for the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line in the South-East Atlantic Ocean on Algoa Voyage 210, September 2014

This is pre-processed Shipboard Acoustic Doppler Current Profiler (SADCP) data for the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line in the South-East Atlantic Ocean on Algoa Voyage 210,15 to 29 September, 2014. This cruise had a primary scientific objective of extending the SAMBA mooring line, the offshore section of the Cape Point long-term monitoring line, and deploying the four offshore tall moorings. This dataset was processed using older standards which may not align with international best practices and the standards currently adhered to by the Department of Forestry, Fisheries and the Environment (DFFE). The Department is re-processing and replacing data to ensure everything has the same format and is of the same quality and datasets will be marked as obsoleted once that is done. As such the user assumes the entire risk related to the use of these data in its current state and format. DFFE disclaims all warranties of the data...

DOI: 10.15493/DEA.MIMS.14842023
West Coast Cetacean Distribution and Abundance Survey on the Algoa Voyage 266, November 2019

The West Coast Cetacean Distribution and Abundance Survey was conducted on Algoa Voyage 266, from 04 November to 15 November 2019. The cruise operated along the shelf and slope regions of the West Coast of South Africa, spanning from Dassen Island to Groenriviermond. The primary objective was to assess the distribution and abundance of cetaceans, particularly humpback whales, in the study area. This work adhered to internationally accepted protocols and provided practical experience in addressing logistical and technical challenges associated with dedicated cetacean research cruises.

DOI: 10.15493/DEA.MIMS.15132023
Processed CTD discrete observations from the South Coast Inshore Demersal Biomass and Horse Mackerel Acoustic Survey on the Africana Voyage 125, September 1994

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 21 September and 18 October 1994, during Voyage 125 on the FRS 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.15112023
Processed CTD discrete observations from the Demersal South Coast Inshore Biomass Survey on the Africana Voyage 122, June 1994

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 06 June and 05 July 1994, during Voyage 122 on the FRS 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.15102023
Processed CTD continuous observations from the Demersal South Coast Inshore Biomass Survey on the Africana Voyage 122, June 1994

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 06 June and 05 July 1994, during Voyage 122 on the FRS 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.26052362
Processed CTD continuous observations from the Africana Voyage 006, February 1983

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. Here, we present processed downcast CTD continuous data collected between 22 February 1983 and 28 February 1983 during Voyage 006 on the Africana in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of South Africa.

DOI: 10.15493/dea.mims.01022021
Plankton Dynamics Cruise on the Africana Voyage 007, March 1983

The Plankton Dynamics Cruise was conducted on the Africana Voyage 007 between 9 March and 22 March 1983. Research was conducted off of the west coast of South Africa between Cape Town and St Helena Bay. The aim of the cruise was to follow a patch of newly upwelled water and to examine changes in the plankton over a 12 day period.

(No DOI)
Raw CTD data from the Winter Shakedown Cruise on SA Agulhas II Voyage 003, July 2012

This is raw Conductivity, Temperature, Depth (CTD) data from the Winter Shakedown Cruise on SA Agulhas II, Voyage 003, 9 July to 6 August, 2012. The cruise started in Cape Town and went down to the GoodHope Line then up to the Prince Edward Islands, on to Port Elizabeth and then back to Cape Town. After the arrival of SA Agulhas II back to South Africa, an inaugural Southern Ocean cruise was undertaken, which included a multidisciplinary program to measure oceanographic and biological parameters that characterise the state of the Southern Ocean in the region of interest to South Africa, along with the ecosystem properties of the major gyres, frontal systems and shelf and plateau areas. Additionally, land-based research on marine mammals and seabirds was undertaken at South Africa’s Prince Edward Islands (PEIs). The aim of the cruise was to test the research vessels capability and its equipment and to increase our understanding with regard to the influences of oceanographic...

DOI: 10.15493/DEA.MIMS.250121-12
St Helena Bay Monitoring Line (SHBML) on the Ellen Kuzwayo Voyage 097, September 2011

This St Helena Bay Monitoring Line (SHBML) cruise was conducted on the Ellen Kuzowayo Voyage 097 in September 2011. This is a long-term monitoring line conducted off the coast of Elands/St Helena Bay on the west coast of South Africa. SHBML started in 2000 as a BENEFIT-driven project on "shipboard monitoring" which linked with similar lines run in Namibia and Angola. The aims were to obtain seasonal and interannual information on the hydrology and productivity of the area. It was incorporated under the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) in 2013 consolidating a long-term, multi-decadal time-series (from 1951 onward) of information for this important region and has continued monitoring in the form of the IEP:SB. The programme is a multi-disciplinary, collaborative and capacity building platform undertaking relevant science, including updating technology, with the aim to develop ecosystem indicators that can be used to effectively monitor and understand the...

DOI: 10.15493/DEA.MIMS.14902023
Pelagic Fish Spawner Biomass Survey on the Africana Voyage 117, November 1993

The Pelagic Fish Spawner Biomass Survey was conducted on the Africana 117 from 9 November to 4 December 1993. The objectives included an estimation of 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; determining the age-composition of the anchovy population; estimating of anchovy biomass by means of the egg production method and a trial estimation of pilchard biomass by means of the egg production method.

DOI: 10.15493/dea.mims.26052237
Integrated Ecosystem Programme cruise: Southern Benguela (IEP:SB) on the Algoa Voyage 228, May 2016

The Integrated Ecosystem Programme (IEP) cruise: Southern Benguela was conducted on the Algoa V228, 19 - 27 May 2016. The Integrated Ecosystem Programme: Southern Benguela is a multi-disciplinary, multi-institutional platform to undertake relevant science in the Southern Benguela; also functioning as a platform for collaboration and learning. All projects aim to develop an ecosystem indicator that can be used to effectively monitor and understand the Southern Benguela i.e physical, chemical, planktonic, microbial, seabird and benthic ecosystem indicators, used for ecosystem-based management.

DOI: 10.15493/dea.mims.26052243
Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on Algoa Voyage 239, May 2017

The Integrated Ecosystem Programme: Southern Benguela (IEP:SB) was conducted on the Algoa Voyage 239 (ALG239) from 22 to 29 May 2017. This programme is a multi-disciplinary, multi-institutional platform to undertake relevant science in the Southern Benguela; also functioning as a platform for collaboration and learning. All projects aim to develop an ecosystem indicator that can be used to effectively monitor and understand the Southern Benguela i.e physical, chemical, planktonic, microbial, seabird and benthic ecosystem indicators, used for ecosystem-based management.

DOI: 10.15493/DEA.MIMS.14532023
Processed Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 216, May 2015

This is processed Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) data from the Integrated Ecosystem Programme cruise in the Southern Benguela (IEP-SB). The cruise took place from 7 to 12 May 2015 aboard the RV Algoa. A total of 41 stations were occupied along four transect lines on the west coast of South Africa and additional stations where a red tide was crossed. Ten Conductivity, Temperature, Depth (CTD) stations were occupied along the Kleinsee Monitoring Line (KML) of Kleinsee, ten along the Namaqua Monitoring Line (NML) of Namaqua, eleven stations along the St Helena Bay Monitoring Line (SHBML), two separate stations in the low oxygen zone in St Helena Bay and eight stations along the Scarborough Monitoring Line (SCL) of Cape Columbine. Discrete water samples were collected in 500ml Certified Reference Materials (CRM) bottles from Niskin bottles and spiked with 0,02% of Mercuric chloride before being stored in the dark at room temperature for later analysis in the...

DOI: 10.15493/DEA.MIMS.14542023
Processed Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 218, September 2015

This is processed Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) data from the Integrated Ecosystem Programme cruise in the Southern Benguela (IEP-SB). The cruise took place from 17 to 21 September 2015 aboard the RV Algoa. A total of 27 stations were occupied along three transect lines on the west coast of South Africa. Nine Conductivity, Temperature, Depth (CTD) stations were occupied along the Kleinsee Monitoring Line (KML) of Kleinsee, ten along the Namaqua Monitoring Line (NML) of Namaqua, six stations along the St Helena Bay Monitoring Line (SHBML) and two separate stations in the low oxygen zone in St Helena Bay. Discrete water samples were collected in 500ml Certified Reference Materials (CRM) bottles from Niskin bottles and spiked with 0,02% of Mercuric chloride before being stored in the dark at room temperature for later analysis in the laboratory ashore using a Versatile INstrument for the Determination of Total inorganic carbon and titration Alkalinity...

DOI: 10.15493/DEA.MIMS.14642023
Processed Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on Algoa Voyage 244, November 2017

This is processed Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) data from the Integrated Ecosystem Programme cruise in the Southern Benguela (IEP-SB).The cruise took place from 22 to 26 November 2017 aboard the RV Algoa. A total of 34 stations were occupied along three transect lines on the west coast of South Africa. Ten Conductivity, Temperature, Depth (CTD) stations were occupied along the Kleinsee Monitoring Line (KML) of Kleinsee, ten along the Namaqua Monitoring Line (NML) of Namaqua, twelve stations along the St Helena Bay Monitoring Line (SHBML), and two separate stations in the low oxygen zone in St Helena Bay. Discrete water samples were collected in 500ml Certified Reference Materials (CRM) bottles from Niskin bottles and spiked with 0,02% of Mercuric chloride before being stored in the dark at room temperature for later analysis in the laboratory ashore using a Versatile INstrument for the Determination of Total inorganic carbon and titration Alkalinity...

739 datasets found Page 27 of 30

Geographic extent

Temporal extent