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DOI: 10.15493/DEA.MIMS.11652023

Processed CTD continuous observations from the South West African Pilchard and Anchovy Biomass Survey on the Africana Voyage 074, June 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected, between 22 June and 04 July 1989, during Voyage 074 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. The objectives of the South West African Pilchard and Anchovy Biomass Survey were to undertake an acoustic / trawling survey of the pilchard stock off SWA and arrive at a stock estimate; to survey the horse-mackerel and anchovy stocks off South West Africa (SWA) and obtain stock estimates if possible and to collect the environmental information on the habitat of the above species primarily by means of CTD and U³ dips in the upper 200m.

DOI: 10.15493/DEA.MIMS.11652023

Processed CTD continuous observations from the South West African Pilchard and Anchovy Biomass Survey on the Africana Voyage 074, June 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected, between 22 June and 04 July 1989, during Voyage 074 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. The objectives of the South West African Pilchard and Anchovy Biomass Survey were to undertake an acoustic / trawling survey of the pilchard stock off SWA and arrive at a stock estimate; to survey the horse-mackerel and anchovy stocks off South West Africa (SWA) and obtain stock estimates if possible and to collect the environmental information on the habitat of the above species primarily by means of CTD and U³ dips in the upper 200m.

DOI: 10.15493/DEA.MIMS.11622023

Processed CTD discrete observations from the Anchovy Recruitment Survey on the Africana Voyage 073, June 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 08 and 22 June 1989 during Voyage 073 on the FRS Africana, in 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 objectives of the Anchovy Recruitment Survey were to assess anchovy recruitment strength in South African waters in order to recommend a final quota for the 1989 RSA anchovy fishing season; to collect data for the determination of the target strength of anchovy and other pelagic and mesopelagic species; to collect data on shoaling behaviour of pelagic fish, specifically anchovy, pilchard and red-eye; to investigate relationships between the distribution of pelagic fish, zooplankton and water temperature; to determine standing stocks...

DOI: 10.15493/DEA.MIMS.11622023

Processed CTD discrete observations from the Anchovy Recruitment Survey on the Africana Voyage 073, June 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 08 and 22 June 1989 during Voyage 073 on the FRS Africana, in 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 objectives of the Anchovy Recruitment Survey were to assess anchovy recruitment strength in South African waters in order to recommend a final quota for the 1989 RSA anchovy fishing season; to collect data for the determination of the target strength of anchovy and other pelagic and mesopelagic species; to collect data on shoaling behaviour of pelagic fish, specifically anchovy, pilchard and red-eye; to investigate relationships between the distribution of pelagic fish, zooplankton and water temperature; to determine standing stocks...

DOI: 10.15493/DEA.MIMS.11612023

Processed CTD continuous observations from the Anchovy Recruitment Survey on the Africana Voyage 073, June 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 08 and 22 June 1989 during Voyage 073 on the FRS Africana, in 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 objectives of the Anchovy Recruitment Survey were to assess anchovy recruitment strength in South African waters in order to recommend a final quota for the 1989 RSA anchovy fishing season; to collect data for the determination of the target strength of anchovy and other pelagic and mesopelagic species; to collect data on shoaling behaviour of pelagic fish, specifically anchovy, pilchard and red-eye; to investigate relationships between the distribution of pelagic fish, zooplankton and water temperature; to determine standing stocks of...

DOI: 10.15493/DEA.MIMS.11612023

Processed CTD continuous observations from the Anchovy Recruitment Survey on the Africana Voyage 073, June 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 08 and 22 June 1989 during Voyage 073 on the FRS Africana, in 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 objectives of the Anchovy Recruitment Survey were to assess anchovy recruitment strength in South African waters in order to recommend a final quota for the 1989 RSA anchovy fishing season; to collect data for the determination of the target strength of anchovy and other pelagic and mesopelagic species; to collect data on shoaling behaviour of pelagic fish, specifically anchovy, pilchard and red-eye; to investigate relationships between the distribution of pelagic fish, zooplankton and water temperature; to determine standing stocks of...

DOI: 10.15493/DEA.MIMS.02112024

Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana Voyage 072, May 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected, between 10 May and 29 May 1989, during voyage 072 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.

DOI: 10.15493/DEA.MIMS.02112024

Processed CTD discrete observations from the South Coast Demersal Biomass Survey on the Africana Voyage 072, May 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected, between 10 May and 29 May 1989, during voyage 072 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.

DOI: 10.15493/DEA.MIMS.11552023

Processed CTD continuous observations from the Physical-Chemical Oceanography Cruise on the Africana Voyage 070, March 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 02 and 11 March 1989 during Voyage 070 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. The objectives of the Physical-Chemical Oceanography Cruise were to retrieve six acoustic current meters deployed in September 1988; to recover and redeploy the sequentially sampling sediment trap and the two Anderaa current meters incorporated on the array at a position 90 miles west of Walvis Bay; to repeat a line of CTD stations running at right angles to the shelf from the 4000m Cape Basin station towards Conception Bay; to take size-fractional chlorophyll samples at 3-hourly intervals to calibrate the in-line fluorometer in the hydro...

DOI: 10.15493/DEA.MIMS.11552023

Processed CTD continuous observations from the Physical-Chemical Oceanography Cruise on the Africana Voyage 070, March 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 02 and 11 March 1989 during Voyage 070 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. The objectives of the Physical-Chemical Oceanography Cruise were to retrieve six acoustic current meters deployed in September 1988; to recover and redeploy the sequentially sampling sediment trap and the two Anderaa current meters incorporated on the array at a position 90 miles west of Walvis Bay; to repeat a line of CTD stations running at right angles to the shelf from the 4000m Cape Basin station towards Conception Bay; to take size-fractional chlorophyll samples at 3-hourly intervals to calibrate the in-line fluorometer in the hydro...

DOI: 10.15493/DEA.MIMS.11532023

Processed CTD discrete observations from the West Coast Hake Biomass Survey on the Africana Voyage 069, January 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 05 and 26 January 1989 during Voyage 069 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. The West Coast Hake Biomass Survey was multi-disciplinary. The main target was to determine, by means of the swept area method, the present status of the hake resource on the South African west coast. In carrying out this study, it was possible also to collect some information on the environment and zooplankton (including squid larvae) in the vicinity of the catches and to determine some ecological interrelationships of hake and other demersal fish species, to investigate squid distribution, to study some aspects of the biology and...

DOI: 10.15493/DEA.MIMS.11532023

Processed CTD discrete observations from the West Coast Hake Biomass Survey on the Africana Voyage 069, January 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 05 and 26 January 1989 during Voyage 069 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. The West Coast Hake Biomass Survey was multi-disciplinary. The main target was to determine, by means of the swept area method, the present status of the hake resource on the South African west coast. In carrying out this study, it was possible also to collect some information on the environment and zooplankton (including squid larvae) in the vicinity of the catches and to determine some ecological interrelationships of hake and other demersal fish species, to investigate squid distribution, to study some aspects of the biology and...

DOI: 10.15493/DEA.MIMS.11522023

Processed CTD continuous observations from the West Coast Hake Biomass Survey on the Africana Voyage 069, January 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 05 and 26 January 1989 during Voyage 069 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. The West Coast Hake Biomass Survey was multi-disciplinary. The main target was to determine, by means of the swept area method, the present status of the hake resource on the South African west coast. In carrying out this study, it was possible also to collect some information on the environment and zooplankton (including squid larvae) in the vicinity of the catches and to determine some ecological interrelationships of hake and other demersal fish species, to investigate squid distribution, to study some aspects of the biology and...

DOI: 10.15493/DEA.MIMS.11522023

Processed CTD continuous observations from the West Coast Hake Biomass Survey on the Africana Voyage 069, January 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 05 and 26 January 1989 during Voyage 069 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. The West Coast Hake Biomass Survey was multi-disciplinary. The main target was to determine, by means of the swept area method, the present status of the hake resource on the South African west coast. In carrying out this study, it was possible also to collect some information on the environment and zooplankton (including squid larvae) in the vicinity of the catches and to determine some ecological interrelationships of hake and other demersal fish species, to investigate squid distribution, to study some aspects of the biology and...

DOI: 10.15493/DEA.MIMS.11502023

Processed CTD discrete observations from the Physical-Chemical Oceanography Cruise on the Africana Voyage 067, September 1988

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 14 and 30 September 1988 during Voyage 067 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. The Physical-Chemical Oceanography Cruise was divided into two legs with the first leg focusing on physical oceanography and the latter on chemical oceanography. The purpose of the first leg of the cruise was primarily to moor current meters and water-level recorders at various sites, mostly north of the Orange River, and to obtain a precise set of Conductivity-Temperature-Depth (CTD) data on a line running normal to the topography from a point in 4200m of water into Conception Bay. The CTD data will be used to calculate water...

DOI: 10.15493/DEA.MIMS.11502023

Processed CTD discrete observations from the Physical-Chemical Oceanography Cruise on the Africana Voyage 067, September 1988

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 14 and 30 September 1988 during Voyage 067 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. The Physical-Chemical Oceanography Cruise was divided into two legs with the first leg focusing on physical oceanography and the latter on chemical oceanography. The purpose of the first leg of the cruise was primarily to moor current meters and water-level recorders at various sites, mostly north of the Orange River, and to obtain a precise set of Conductivity-Temperature-Depth (CTD) data on a line running normal to the topography from a point in 4200m of water into Conception Bay. The CTD data will be used to calculate water...

DOI: 10.15493/DEA.MIMS.11492023

Processed CTD continuous observations from the Physical-Chemical Oceanography Cruise on the Africana Voyage 067, September 1988

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 14 and 30 September 1988 during Voyage 067 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. The Physical-Chemical Oceanography Cruise was divided into two legs with the first leg focusing on physical oceanography and the latter on chemical oceanography. The purpose of the first leg of the cruise was primarily to moor current meters and water-level recorders at various sites, mostly north of the Orange River, and to obtain a precise set of Conductivity-Temperature-Depth (CTD) data on a line running normal to the topography from a point in 4200m of water into Conception Bay. The CTD data will be used to calculate water flux...

DOI: 10.15493/DEA.MIMS.11492023

Processed CTD continuous observations from the Physical-Chemical Oceanography Cruise on the Africana Voyage 067, September 1988

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 14 and 30 September 1988 during Voyage 067 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. The Physical-Chemical Oceanography Cruise was divided into two legs with the first leg focusing on physical oceanography and the latter on chemical oceanography. The purpose of the first leg of the cruise was primarily to moor current meters and water-level recorders at various sites, mostly north of the Orange River, and to obtain a precise set of Conductivity-Temperature-Depth (CTD) data on a line running normal to the topography from a point in 4200m of water into Conception Bay. The CTD data will be used to calculate water flux...

DOI: 10.15493/DEA.MIMS.05282023

Processed CTD continuous observations from the South Coast Hake Biomass Survey on the Africana Voyage 063, May 1988

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data 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.05282023

Processed CTD continuous observations from the South Coast Hake Biomass Survey on the Africana Voyage 063, May 1988

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data 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.05252023

Processed CTD discrete observations from the West Coast Hake Biomass Survey on the Africana Voyage 059, February 1988

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 02 February and 25 February 1988, during the West Coast Hake Biomass Cruise on the Africana Voyage 059, in 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 survey by means of trawling the abundance of adult and recruiting hake in South African waters; to investigate the diurnal cycle of hake and other demersal species; to make some experimental trawls in deep water to collect deep-water specimens of fish and squid; to collect routine biological material on demersal species from South West African waters; to investigate the occurence, distribution and abundance of squid and squid larvae;...

DOI: 10.15493/DEA.MIMS.05252023

Processed CTD discrete observations from the West Coast Hake Biomass Survey on the Africana Voyage 059, February 1988

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 02 February and 25 February 1988, during the West Coast Hake Biomass Cruise on the Africana Voyage 059, in 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 survey by means of trawling the abundance of adult and recruiting hake in South African waters; to investigate the diurnal cycle of hake and other demersal species; to make some experimental trawls in deep water to collect deep-water specimens of fish and squid; to collect routine biological material on demersal species from South West African waters; to investigate the occurence, distribution and abundance of squid and squid larvae;...

DOI: 10.15493/DEA.MIMS.05242023

Processed CTD continuous observations from the West Coast Hake Biomass Survey on the Africana Voyage 059, February 1988

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 02 February and 25 February 1988, during the West Coast Hake Biomass Cruise on the Africana Voyage 059, in 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 survey by means of trawling the abundance of adult and recruiting hake in South African waters; to investigate the diurnal cycle of hake and other demersal species; to make some experimental trawls in deep water to collect deep-water specimens of fish and squid; to collect routine biological material on demersal species from South West African waters; to investigate the occurence, distribution and abundance of squid and squid larvae; to...

DOI: 10.15493/DEA.MIMS.05242023

Processed CTD continuous observations from the West Coast Hake Biomass Survey on the Africana Voyage 059, February 1988

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 02 February and 25 February 1988, during the West Coast Hake Biomass Cruise on the Africana Voyage 059, in 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 survey by means of trawling the abundance of adult and recruiting hake in South African waters; to investigate the diurnal cycle of hake and other demersal species; to make some experimental trawls in deep water to collect deep-water specimens of fish and squid; to collect routine biological material on demersal species from South West African waters; to investigate the occurence, distribution and abundance of squid and squid larvae; to...

DOI: 10.15493/DEA.MIMS.05202023

Processed CTD continuous observations from the Anchovy and Pilchard Spawning Stock Survey on the Africana Voyage 057, November 1987

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data 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 of...

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