West Coast Hake Biomass Survey on the Africana Voyage 075, July 1989

The West Coast Hake Biomass Survey on the Africana Voyage 075 was conducted from 14 July - 17 August 1989. The objectives of the cruise were 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 investigate the environmental and ecological interrelationships of hake and demersal species; to make some experimental trawls in deep water to determine hake distribution limits and 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 study demersal community interrelationships; to study the biology of sharks and selected non-commercial fish species; to investigate zooplankton scattering layers and their influence on the feeding behaviour of small hake and to extend the primary production data further offshore as well as north and eastwards from the Cape Peninsula - Cape Columbine area.