195 datasets found Page 5 of 8
DOI: 10.15493/dea.mims.26500003
Compilation of validated and processed data (deck, flow and count) from the St Helena Bay Monitoring Line (SHBML) on the Africana Voyage 269, January 2011

Compilation of processed and validated data of mesozooplankton along the St Helena Bay Monitoring Line (SHBML) (now under the Integrated Ecosystem Programme: Southern Benguela) on the Africana, Voyage 269, from 11 to 13 January 2011. This includes the validated flow, processed counts and validated ship`s information. This is ready for analysis by a user. The St Helena Bay Monitoring Line was initiated as a BENEFIT-driven project on "shipboard monitoring" which linked with similar lines run in Namibia and Angola. The aims are to obtain seasonal and interannual information on the hydrology and productivity of the area. Data on harmful algal blooms, low oxygen water and intrusions of Agulhas Bank water along the west coast are also collected. A long-term, multi-decadel time-series (from 1951 onward) of information already exists for this important region and has continued in the form of the IEP:SB to detect long-term changes in the hydrology and the plankton, which are important for...

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Processed Chlorophyll data from the International Indian Ocean Expedition 2 (IIOE2) cruise on SA Agulhas II Voyage 032, June 2018

The International Indian Ocean Expedition 2 (IIOE2) is a collaborative regional cruise to build capacity and strength within Africa. The focus will be on developing students in the region in the areas of physical oceanography, chemistry, biological oceanography, benthic biodiversity, marine top predators and marine plastics. This is processed Chlorophyll data collected from Niskin Bottles from the IIOE2 cruise on SA Agulhas II Voyage 032, between the 10th June and 13th July 2018.

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Processed Shipboard Acoustic Doppler Current Profiler (SADCP) data from the International Indian Ocean Expedition 2 (IIOE2) cruise on SA Agulhas II Voyage 028, October 2017

This is processed Shipboard Acoustic Doppler Current Profiler (SADCP) data from the IIOE2 cruise on SA Agulhas II Voyage 028 in October, 2017. The International Indian Ocean Expedition 2 is a collaborative regional cruise to build capacity and strength within Africa. The focus will be on developing students in the region in the areas of physical oceanography, chemistry, biological oceanography, benthic biodiversity, marine top predators and marine plastics. 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...

(No DOI)
Processed CTD data from the Marion Island Relief on the SA Agulhas II Voyage 036, April 2019

The 2019 Marion Relief Voyage offered the 7th opportunity to conduct multi-disciplinary, shipbased marine research focusing on links and interactions between air and sea, ocean physics, chemistry, biogeochemistry and biology, including microbial, planktic and benthic communities on board South Africa’s polar research and supply vessel MV SA Agulhas II en route to, and around, the sub-Antarctic Prince Edward archipelago. The overall aim was to continue contributing to an oceanographic observation and monitoring system directed by South African research institutions in support of South Africa’s needs – and where possible, in support of global requirements of inter alia the Global Oceans Observing System (GOOS), the Southern Ocean Observing System (SOOS), the Convention for the Conservation of Antarctic Marine Living Resources (CCAMLR), and the Agreement on the Conservation of Albatrosses and Petrels (ACAP). With the declaration on 9 April 2013 of the Prince Edward Islands (PEIs) as...

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

This is processed 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...

DOI: 10.15493/DEA.MIMS.18072024
South Coast Demersal Biomass Survey on the Africana Voyage 093, June 1991

The South Coast Demersal Biomass Survey on the Africana Voyage 093 was conducted from 7 June 1991 to 5 July 1991. The main objectives of the cruise were to conduct a random stratified bottom trawl survey to assess the biomass, abundance and distribution of hake, sole, horse mackerel, squid and other trawl species; to investigate the hydrology and current profiles of the South Coast and to relate this to the distribution of the major demersal trawl species; this will include five transects extending from specified areas on the South Coast and approximately perpendicular to the coastline outwards towards the mainstream of the Agulhas Current; to do a selected number of mid-water trawls to test for the abundance of kingklip and hake and other demersal species as close as possible to the bottom and in midwater over grounds normally inaccessible to bottom trawl gear. To conduct routine biological sampling of the main demersal species; to sample squid intensively to establish their...

DOI: 10.15493/DEA.MIMS.21072024
South Coast Demersal Biomass Survey on the Africana Voyage 095, September 1991

The South Coast Demersal Biomass Survey on the Africana Voyage 095 was conducted on 12 September 1991 to 3 October 1991. The main objective of the survey was to conduct a random stratified bottom trawl survey to assess the biomass, abundance and distribution of hake, sole, horse mackerel, squid and other trawl species with emphasis on 'inshore' fishing areas for recruitment estimates; to investigate the hydrology and current profiles of the South Coast and to relate this to the distribution of the major demersal trawl species; this included five transects extending from specified areas on the South Coast and approximately perpendicular to the coastline out towards the mainstream of the Agulhas Current. A CTD grid in the Cape St Francis area was also done; to do a selected number of midwater trawls to test for the abundance of kingklip and hake and other demersal species as close as possible to the bottom and in midwater over grounds normally inaccessible to bottom trawl gear; to do...

(No DOI)
Raw SADCP data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 209, August 2014

This is raw Shipboard Acoustic Doppler Current Profiler (SADCP) data from the Integrated Ecosystem Programme: Southern Benguela on the Algoa Voyage 209, 5 to 15 August, 2014. The Integrated Ecosystem Programme: Southern Benguela (IEP:SB) 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. IEP:SB focuses on the biologically productive, cold waters of the Benguela Current Large Marine Ecosystem, which are inherently variable on short time-scales and responsive to changing weather patterms. The research aims to provide relevant, reliable and improved assessment of the ecosystem, in support of its effective...

DOI: 10.15493/DEA.MIMS.26042025
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Microplankton monitoring along the west coast of South Africa

Microplankton, comprising of both phyto- and zooplankton in the 20-200μm size range, are a diverse and ecologically important group. They form the foundation of the food web, are instrumental in carbon and nutrient cycling, generate at least 50% of global oxygen and facilitate energy flow to higher trophic levels. Although they are found in all oceans globally, their diversity and abundance is varied. Due to their high sensitivity and rapid response to changes in the environment, their biomass and diversity are considered Essential Ocean Variables (EOV's) for routine and sustained long term observations to assess global ocean changes. This dataset forms part of the routine monitoring along the west coast of South Africa - Integrated Ecosystem Programme: Southern Benguela which occurs biannually in February and August. This resource contains raw image data for February 2018 obtained from water samples processed using a FlowCam VS3. The dataset comprises all images obtained of both...

DOI: 10.15493/DEA.MIMS.54072024
Pelagic Pre-Recruit Mesopelagic Biomass Survey on the Africana Voyage 101, March 1992

The Pelagic Pre-Recruit Mesopelagic Biomass Survey was conducted on the Africana Voyage 101 from 11-23 March 1992. The objectives of the cruise were to get an estimation of the biomass and population structure of pelagic pre-recruit fish off the West Coast by means of echo-integration and midwater trawling; to get an estimation of a pelagic pre-recruit biomass index using quantitative Methot trawls; to get an 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; to collect biological material for age, oil content, diet and condition studies on pelagic pre-recruits; to profile currents by means of the acoustic doppler current profiler; and to test the feasibility of using a towed transducer for the acoustic assessment of pelagic pre-recruits.

DOI: 10.15493/DEA.MIMS.05092022
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Processed imagery data collected off the western margin's deep-sea environment on Algoa Voyage 246, February 2018

The aim of the Integrated Ecosystem Program (IEP) Benthic Project is to establish a baseline for epi-benthic invertebrate distribution, in order to identify benthic indicators for long-term monitoring within the pre-determined IEP monitoring lines. Ten stations were successfully surveyed, on board the R/V Algoa in February 2018, using a towed under-water benthic camera. The acquired abundance data represents five stations from the Kleinsee transect, four from Namaqua and one from St Helena Bay.

DOI: 10.15493/DEA.MIMS.14512023
Surface Chlorophyll a concentration and Secchi depth data from the SEAHAB project, March 2023

This was the in situ data collection for the Sensor-agnostic Estimation of Harmful Algal Blooms (SEAHAB) project, March 2023. The data represents two days of surface water sampling between Table Bay and Kommetjie for the purpose of satellite chlorophyll a concentration and water clarity validation.

(No DOI)
Chl-a data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on Algoa Voyage 212, November 2014

First look at Chl-a data from a survey of the West Coast of South Africa as part of the Integrated Ecosystem Programme: Southern Benguela on the Algoa Voyage 212, 12 to 26 November, 2014. 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.26052219
Port St Johns Conductivity Temperature Depth (CTD) and Bathymetry Survey on Algoa Voyage 198, May 2013

The Port St Johns Conductivity, Temperature, Depth (CTD) and Bathymetry Survey was conducted on the Algoa Voyage 198, 8 May - 13 May, 2013. This cruise has two scientific objectives: (1) to investigate the dynamics of the Port St. Johns eddy and biological implications and (2) to investigate the existence of mesoscale eddies in the Agulhas Current. In the case of the former, Oceans and Coasts was asked to provide input to the recent spate of shark attacks off Port St. Johns. Very little is known about the oceanography except that Roberts et al (2010) discovered during a cruise a lee-trapped cyclonic eddy off Port St. Johns that caused substantial slope upwelling. The cold upwelled water is nutrient-rich and appears to provide a biological pump to the local ecosystem. This cruise will deploy an ADCP in a depth of approximately 80 m to determine the frequency of appearance of this eddy coupled with Conductivity, Temperature, Depth (CTD) lines to measure the biological implications....

DOI: 10.15493/DEA.MIMS.08092025
Benthic‑bycatch dataset from Prince Edward and Marion Islands longline fisheries (2009‑2023)

This dataset presents a time series of benthic invertebrate bycatch records collected during pelagic longline fishing operations targeting Patagonian toothfish (Dissostichus eleginoides) in the Prince Edward Islands region of the sub-Antarctic Southern Ocean from 2009 to 2023. The data were obtained from independent scientific observers aboard commercial vessels in accordance with Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) Conservation Measure 22-06, which mandates the reporting of taxa associated with Vulnerable Marine Ecosystems (VMEs). Each record includes an entry number, observer segment unique identifier, vessel unique identifier, observer logbook number, year the record was collected, line segment number, taxonomic code as given in 2009 CCAMLR VME guide, associated taxonomic name, bycatch weight at random segments per fishing line/set, gear type used, number of fishing hooks used at the specific segment, and anonymous vessel number. The...

(No DOI)
Raw SDS data from the Moorings and Monitoring Lines Cruise: Cape Point and Port St Johns on the Algoa Voyage 204, November 2013

This is raw Scientific Data System (SDS) data from the Moorings and Monitoring Lines Cruise: Cape Point and Port St Johns on the Algoa Voyage 204, 25 November to 6 December, 2013. The South Coast Mooring Cruise had two scientific objectives: (1) Service, maintain and extend the in situ operational oceanography network currently deployed around South Africa and (2) to investigate the dynamics of the Port St Johns eddy and biological implications.

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

This is processed Expendable Bathythermograph (XBT) 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...

(No DOI)
Pre-processed chlorophyll a data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 209, August 2014

This is pre-processed chlorophyll a data from the Integrated Ecosystem Programme: Southern Benguela on the Algoa Voyage 209, 5 to 15 August, 2014. The Integrated Ecosystem Programme: Southern Benguela (IEP:SB) 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. IEP:SB focuses on the biologically productive, cold waters of the Benguela Current Large Marine Ecosystem, which are inherently variable on short time-scales and responsive to changing weather patterms. The research aims to provide relevant, reliable and improved assessment of the ecosystem, in support of its effective management, preservation and...

(No DOI)
SDS data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 209, August 2014

This is Scientific Data System (SDS) data from the Integrated Ecosystem Programme: Southern Benguela on the Algoa Voyage 209, 5 to 15 August, 2014. The Integrated Ecosystem Programme: Southern Benguela (IEP:SB) 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. IEP:SB focuses on the biologically productive, cold waters of the Benguela Current Large Marine Ecosystem, which are inherently variable on short time-scales and responsive to changing weather patterms. The research aims to provide relevant, reliable and improved assessment of the ecosystem, in support of its effective management, preservation and...

(No DOI)
Raw CTD data from Port St Johns Conductivity Temperature Depth (CTD) and Bathymetry Survey on Algoa Voyage 198, May 2013

Raw Conductivity, Temperature, Depth (CTD) data from Port St Johns Conductivity, Temperature, Depth (CTD) and Bathymetry Survey on Algoa Voyage 198, 8 May - 13 May, 2013. This cruise has two scientific objectives: (1) to investigate the dynamics of the Port St. Johns eddy and biological implications and (2) to investigate the existence of mesoscale eddies in the Agulhas Current. In the case of the former, Oceans & Coasts was asked to provide input to the recent spate of shark attacks off Port St. Johns. Very little is known about the oceanography except that Roberts et al (2010) discovered during a cruise a lee-trapped cyclonic eddy off Port St. Johns that caused substantial slope upwelling. The cold upwelled water is nutrient-rich and appears to provide a biological pump to the local ecosystem. This cruise will deploy an ADCP in a depth of approximately 80 m to determine the frequency of appearance of this eddy coupled with Conductivity, Temperature, Depth (CTD) lines to measure...

(No DOI)
No Download
Processed Chlorophyll data from the International Indian Ocean Expedition 2 (IIOE2) cruise on SA Agulhas II Voyage 028, October 2017

The International Indian Ocean Expedition 2 (IIOE2) is a collaborative regional cruise to build capacity and strength within Africa. The focus will be on developing students in the region in the areas of physical oceanography, chemistry, biological oceanography, benthic biodiversity, marine top predators and marine plastics. This is processed Chlorophyll data from the IIOE2 cruise on SA Agulhas II Voyage 028, between the 14th October and 15th November 2017.

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...

(No DOI)
Processed CTD data from the Marion Island Annual Relief Voyage on the SA Agulhas II Voyage 024, April 2017

This is processed Conductivity, Temperature, Depth (CTD) data from the Marion Island Annual Relief Voyage on the SA Agulhas II Voyage 024, 06 April to 12 May 2017. The 2017 Marion Relief Voyage offered the fifth opportunity to conduct multi-disciplinary, shipbased marine research focusing on links and interactions between air and sea, ocean physics, chemistry, biogeochemistry and biology, including microbial, planktic and benthic communities on board South Africa’s polar research and supply vessel MV SA Agulhas II en route to, and around, the sub-Antarctic Prince Edward archipelago. The overall aim was to continue contributing to an oceanographic observation and monitoring system directed by South African research institutions in support of South Africa’s needs – and where possible, in support of global requirements of inter alia the Global Oceans Observing System (GOOS), the Southern Ocean Observing System (SOOS), the Convention for the Conservation of Antarctic Marine Living...

DOI: 10.15493/DEA.MIMS.605201
Analysed Particulate Organic Matter data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 235, February 2017

Particulate Organic Matter data (stable isotope) for the Integrated Ecosystem Programme: Southern Benguela (IEP:SB): Feb 2017. IEP:SB focuses on the biologically productive, cold waters of the Benguela Current Large Marine Ecosystem, which are inherently variable on short time-scales and responsive to changing weather patterns. The research aims to provide relevant, reliable and improved assessment of the ecosystem, in support of its effective management, preservation and conservation, so that South Africans can benefit from a healthy and well-functioning ocean environment. The overarching objective is to enhance understanding in process studies by assessing the importance, timing and magnitude of mechanisms and processes that influence the Southern Benguela ecosystem structure and functioning, including the climate variability.

DOI: 10.15493/DEA.MIMS.57072024
South Coast Demersal Biomass Survey on the Africana Voyage 102, April 1992

The South Coast Demersal Biomass Survey was conducted on the Africana Voyage 102 from 31 March to 21 April 1992. The objectives of the cruise were to conduct a random stratified bottom trawl survey to assess the biomass, abundance, and distribution of hake, sole, horse mackerel, squid and other trawl species; to investigate the hydrology and current profiles of the South Coast and to relate this to the distribution of the major demersal trawl species. This included five transects extending from specified areas on the South Coast and approximately perpendicular to the coastline outwards toward the main stream of the Agulhas Current; to survey acoustically the major squid spawning grounds to determine the extent of aggregation of squid shoals at the time of the year; to do a selected number of mid-water trawls to test for the abundance of kingklip and hake and other demersal species as close as possible to the bottom and in midwater over grounds normally inaccessible to bottom trawl...

195 datasets found Page 5 of 8

Geographic extent

Temporal extent