| Title | Pelagic Fish Spawner Biomass Survey on the Africana Voyage 132, November 1995 |
|---|---|
| Authors |
Barange, Manuel |
| Publisher | Department of Forestry, Fisheries and the Environment (2026) |
| Contributors |
Contact Person: Tutt, Gavin Project Leader: Lamont, Tarron |
| Abstract | 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 netphytoplankton (>10 μm) size-classes in surface waters; to obtain information on the distribution and abundance of mesozooplankton; to estimate secondary production rates of adult copepods using the egg production method; to investigate the relationships between water temperature, phytoplankton size, phytoplankton biomass, copepod biomass and production, and the distribution of pelagic fish; and to complete sampling on two SARP-Slangkop lines, aimed at estimating transport rates of spawning products from the western Agulhas to the West coast. |
| Data | |
| Temporal extent | 10 Nov 1995 – 04 Dec 1995 |
| Geographic extent |
Benguela Current Large Marine Ecosystem, Agulhas Current Large Marine Ecosystem
North: -33.5 |
| Keywords | Africana , INDIAN OCEAN , OCEANS , Pelagic Biomass Survey , SOUTH ATLANTIC OCEAN |
| Related resources |
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