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

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data 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.

本数据集呈现了1987年11月5日至11月30日期间，在非洲大陆南部海域的阿古拉斯海流大型海洋生态系统（ACLME）以及南非西海岸的 Benguela 海流大型海洋生态系统（BCLME）区域进行的鲱鱼和鳀鱼产卵种群调查过程中收集的经处理的降流式电导率-温度-深度（CTD）连续数据。研究及监测航次期间，于1983年至2000年间，使用了Neil Brown MK3和MK4 CTD仪器对水柱中的压力、温度和电导率进行测量。航次的主要目标是利用声学方法确定从Hondeklip湾至阿古拉斯滩东端的鳀鱼和鲱鱼产卵种群的生物量。此外，还研究了浮游鱼类、其卵与水温分布之间的关系，并在站点线路上采集化学样本，作为对阿古拉斯滩营养供应持续研究的一部分。