Towards the end of the 1970s and for succeeding years, the Joint Russian-Norwegian Fisheries Commission agreed to introduce annual cod quotas, albeit insufficient to stop a positive trend in fishing mortality until the late 1980s (see Yaragina et al. 2011 and references therein).
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Depletion of coastal predatory fish sub-stocks coincided with the largest sea urchin grazing event observed in the NE Atlantic.
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