The EU probably has the worst system in the world, at least by total impact.
> "every year, the European Commission makes recommendations on the Total Allowable Catch (TAC) to the Council of Ministers based on scientific evidence. The Council of Ministers, however, often disregards these recommendations because, as a rule, the priority for these ministers seems to protect jobs in the short term, not to maintain sustainability. As a consequence, the annual catch agreed to by the Council of Ministers is generally around 48 per cent more than the scientists’ recommended figure. The fact that 88 per cent of European fish stocks, measured against maximum sustainable yield (MSY), are overexploited is due in part to these excessively high catch quotas."
> "every year, the European Commission makes recommendations on the Total Allowable Catch (TAC) to the Council of Ministers based on scientific evidence. The Council of Ministers, however, often disregards these recommendations because, as a rule, the priority for these ministers seems to protect jobs in the short term, not to maintain sustainability. As a consequence, the annual catch agreed to by the Council of Ministers is generally around 48 per cent more than the scientists’ recommended figure. The fact that 88 per cent of European fish stocks, measured against maximum sustainable yield (MSY), are overexploited is due in part to these excessively high catch quotas."
From https://worldoceanreview.com/en/wor-1/fisheries/fisheries-ma...