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.