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TG3 Commercial fish and shellfish

TG3 Commercial fish and shellfish. Gerjan Piet Brussels 1/2/2010. Interpretation. ‘Populations of all commercially exploited fish and shellfish,…...’: Commercially exploited populations applies to all living marine resources targeted for economic profit

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TG3 Commercial fish and shellfish

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  1. TG3Commercial fish and shellfish Gerjan Piet Brussels 1/2/2010

  2. Interpretation • ‘Populations of all commercially exploited fish and shellfish,…...’: • Commercially exploited populations applies to all living marine resources targeted for economic profit • Fish and shellfish as all marine vertebrate and invertebrate taxa including bone-fish, elasmobranchs, starfish, crayfish, bivalves, molluscs and even though they are formally not considered fish or shellfish: cuttlefish, squid, jellyfish. • Emphasis is on commercial importance, NOT abundance or vulnerability • ‘….within safe biological limits..’: • This was interpreted according to ICES as: • Having full reproductive capacity • Exploited sustainably • ‘…..a population age and size distribution that is indicative of a healthy stock’ : • The general consensus is that the health of the stock increases as the age and size distribution consists of more older fish. • Initially inclined to assume this was sufficiently covered by the SBL attributes but now explicitly incorporated

  3. Attributes and indicators(data-rich, based on analytical stock assessments) • Exploited sustainably consistent with high long-term yield • F<FMSY • Full reproductive capacity • SSB>SSBMSY for x% of the stocks • SSB>SSBpa for 100% of the stocks • Healthy age and size distribution • No degradation gradient in 95% percentile of the population length distribution

  4. Attributes and indicators(data-poor, based on RV surveys) • Exploited sustainably consistent with high long-term yield • No degradation gradient in ratio catch/biomass • Full reproductive capacity • No degradation gradient log-transformed abundance • Healthy age and size distribution • No degradation gradient in 95% percentile of the population length distribution

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