JTT, the regulations are absurd because fishermen can not choose what swims into their nets. Throwing back dead fish does nothing for the stocks.
http://www.rip-off.co.uk/hastings_fishing.htm
Also certain EU ports notoriously turn a blind eye to catch quotas for their own vessels.
A better system would be no fishing zones where fish could breed, but certain EU countries will not agree because breaches could not be hidden.