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标题：Setting a Precautionary Catch Limit for Antarctic Krill
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作者：Roger P. Hewitt ; Jon L. Watkins ; Mikio Naganobu 等
期刊名称：Oceanography - Oceanography Society
印刷版ISSN：1042-8275
出版年度：2002
卷号：15
期号：3
页码：26-33
DOI：10.5670/oceanog.2002.12
出版社：Oceanography Society
摘要：A revised precautionary catch limit for Antarctic krill ( Euphausia superba ) in the Scotia Sea of 4 million tons was recently adopted by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR). The limit was based on a total biomass of 44.3 million tons, as estimated from an acoustic and net survey of krill across the Scotia Sea sector of the Southern Ocean, and a harvest rate of 9.1%, as determined from an analysis of the risks of exceeding defined conservation criteria. We caution, however, that before the fishery can expand to the 4-inillion-ton level it will be necessary to establish mechanisms to avoid concentration of fishing effort, particularly in proximity to colonies of land-breeding krill predators, and to consider the effects of krill immigrating into the region from multiple sources.