West Coast Hake Biomass Survey on the Africana Voyage 054, June 1987

The scientific targets of the trip revolved around the determination of biomass index of both Cape hake species off the South African west coast. The diurnal cycle of Cape hake and their relationship with environmental parameters was also studied. Some hake material were collected in South West African waters. Deep-water trawls were made to delimit the offshore extent of hake distribution and to collect rare specimens of fish for accession to museums. Demersal community interrelationships were studied, as were spatial distribution patterns and spawning fractions of round herring.

本次旅行的科学目标围绕南非西海岸两种鲽鱼物种的生物量指数测定展开。同时，研究了对开普鲽鱼的日变化周期及其与环境参数的关系。在西南非洲水域收集了一些鲽鱼样本。进行深海拖网作业，旨在界定鲽鱼的近海分布范围并收集珍稀鱼类标本，以供博物馆收藏。此外，还对底栖生物群落间的相互关系、圆鲱的空间分布模式及产卵比例进行了研究。