| Summary: | In 1902 the Discovery sailed into an ocean that was almost totally unknown biologically. Even so, its living resources of seals had been extensively hunted almost to the point of extinction. Exploitation of the whales was about to begin. The expedition resulted in the discovery of 23 new zooplankton species; 5% of the presently known mesozooplankton fauna. The results were worked up within six years, and paved the way for the next century of research. The ultimate target was to provide the scientific basis for the sustainable management of the Southern Ocean especially the whale stocks. This paper summarizes the knowledge base at the start of the expedition and how the various strands of research became woven into our understanding of the biological oceanography of the Southern Ocean. The science has been both technology driven and technology limited. It failed to convince decision-makers in time to prevent the gross overexploitation of the whales, but the Antarctic Treaty now provides a framework of protection. However, within the last two decades we have come to realize that it is not just whales that are at risk, and that the remoteness of the Southern Ocean is proving no protection against the pervasiveness of anthropogenic influences.
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