Setting a precautionary catch limit for Antarctic krillReport as inadecuate

Author: R. P. Hewitt, J. L. Watkins, M. Naganobu, P. Tshernyshkov, A. S. Brierley, D. A. Demer, S. Kasatkina, Y. Takao, C. Goss, A. Malysh



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 ...

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