In Europe, total allowable catches (TAC) are divided up into national quotas based on a fixed percentage of the stock.
Quota hopping occurs when owners from one country (usually Spain) buy ships and obtains a fishing license in another country (usually the UK) and fishes against the latter's international quota.
http://lib.s.kaiyodai.ac.jp/library/kiyou/ron3902.pdf
Individual Transferable Quotas (ITQ)
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