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

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast 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 stations as part of an ongoing investigation with the supply of nutrients to the Agulhas Bank.

本报告展示了1987年11月5日至11月30日期间，在非洲大陆航行057次调查中，于南非南岸的阿古拉斯洋流大型海洋生态系统（ACLME）南部及南非西岸的 Benguela洋流大型海洋生态系统（BCLME）区域，收集的经处理的电导率-温度-深度（CTD）离散数据。在此期间进行的鱼类产卵种群调查中，运用了Neil Brown MK3和MK4 CTD仪器，对1983年至2000年的研究及监测巡航中水柱中的压力、温度和电导率进行了测量。巡航的主要目标是通过声学方法确定从Hondeklip湾至阿古拉斯滩东端鳀鱼和鲱鱼产卵种群的生物量。此外，还研究了浮游鱼群、其卵与水温之间的分布关系，并在站点沿线采集化学样本，作为对阿古拉斯滩营养供应持续调查的一部分。