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

Here we present raw 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.

本报告呈现了1987年11月5日至11月30日期间，在南非南岸的阿古拉斯海流大型海洋生态系统（ACLME）南部及南非西海岸的贝努埃海流大型海洋生态系统（BCLME）区域进行的鳀鱼和沙丁鱼产卵种群调查（Africana航次057）期间所收集的原始电导率-温度-深度（CTD）连续数据。在1983年至2000年间的科研和监测航次中，利用Neil Brown MK3和MK4 CTD仪器测量了水柱中的压力、温度和电导率。航次的主要目标是利用声学方法确定从霍恩克利普湾至阿古拉斯银行东端的鳀鱼和沙丁鱼产卵种群的生物量。此外，还研究了浮游鱼类、其卵与水温之间的分布关系，并在站线沿线采集化学样品，作为对阿古拉斯银行营养供应持续研究的一部分。