State of the Marine Environment Rainer Froese Leibniz Institute of Marine Sciences, Kiel IfM-GEOMAR

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Presentation transcript:

State of the Marine Environment Rainer Froese Leibniz Institute of Marine Sciences, Kiel IfM-GEOMAR

Acknowledgements Sea Around Us provided data FishBase provided data EEA provided data Daniel Pauly, Boris Worm and Ian Payne shared slides DG Development and DG Research supported previous research

Overview Major Threats to European Seas Paradox of Fishing Myths about Fishing Common Sense Fisheries Policy

Europe‘s Regional Seas

Major Threats to Europe‘s Seas 1.Fishing (NE, North Sea, Mediterranean, Baltic, Black Sea)

Fishing Down Marine Food Webs Pauly et al Science 279: Trophic Level Watson and Pauly In: Atlas of the Ocean

Fishing Down the Food Web in the North Sea (Source: Froese and Pauly 2003) Trends in mean trophic level of annual landings from the North Sea

Major Threats to Europe‘s Seas 1.Fishing (NE, North Sea, Mediterranean, Baltic, Black Sea) 2.Pollution (North Sea, Baltic, Black Sea)

Pollution Regional trends of hazardous substances in fish from north-east Atlantic and Baltic regions (Source: EEA)

Major Threats to Europe‘s Seas 1.Fishing (NE, North Sea, Mediterranean, Baltic, Black Sea) 2.Pollution (North Sea, Baltic, Black Sea) 3.Eutrophication (Black Sea, Baltic, North Sea)

Eutrophication Chlorophyll-a concentrations in transitional, coastal and marine waters (Source: EEA)

Major Threats to Europe‘s Seas 1.Fishing (NE, North Sea, Mediterranean, Baltic, Black Sea) 2.Pollution (North Sea, Baltic, Black Sea) 3.Eutrophication (Black Sea, Baltic, North Sea) 4.Climate change (NE, North Sea)

Climate change Observed European annual average temperature deviations (Source: EEA)

Major Threats to Europe‘s Seas 1.Fishing (NE, North Sea, Mediterranean, Baltic, Black Sea) 2.Pollution (North Sea, Baltic, Black Sea) 3.Eutrophication (Black Sea, Baltic, North Sea) 4.Climate change (NE, North Sea) 5.Invasive species (Black Sea, Mediterranean) 6.Local threats: Coastal developments, Mariculture, Shipping accidents

Paradox of Fishing Reducing pollution, eutrophication, green house gases, and ballast water introductions are ‚common sense‘ solutions that seem to work. Fishing less to get more fish is not ‚common sense‘ Fishers and boats are less but fishing effort has increased Focus only on reducing fishing effort has not worked in the past 100 years and is unlikely to work in the future.

Time Series of Abundance and Fishing Mortality Trends from ‘Working Group’ reports by fisheries scientists in government agencies (NMFS, DFO, DIFMAR, IFREMER, etc.), compiled by R. A. Myers.

Myths about Fishing There are enough fish...

FAO Marine Catches (Source: Froese and Pauly 2003) ?

The Northeast Atlantic, ICES (Source: Froese and Pauly 2003)

Geographic expansion of fisheries (Source: Sea Around Us) Years at and after maximum catch in half-degree cell

Myths about Fishing There are enough fish... It is the climate...

Source: Myers and Worm Nature 423:

Source: Myers and Worm Nature 423:

Source: Myers and Worm Nature 423:

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Myths about Fishing There are enough fish... It is the climate... It is the pollution...

Biomass of table fish in 1900 (t/km 2 ) (Christensen et al. 2003, Fish & Fisheries)

and in 2000….

Myths about Fishing There are enough fish... It is the climate... It is the pollution... Size does not matter...

Size Does Matter! 1.Size at first maturity: fish caught below that size could not spawn; 2.Size at maximum yield: fish caught below that size have not yet reached optimum weight; 3.Mega-spawner size (many eggs, high egg survival, good genes): fish caught below that size have no chance to become Mega- spawners

EC Minimum Size Limits Council Regulation No 2555/2001 SpeciesEC Minimum Size Size at first maturity Size at maximum yield Atlantic cod41 cm60 cm85 cm American plaice 25 cm20 cm25 cm Yellowtail flounder 25 cm26 cm29 cm Greenland halibut 30 cm58 cm72 cm

Myths about Fishing There are enough fish... It is the climate... It is the pollution... Size does not matter... Recruitment can be predicted... Stocks will recover... Aquaculture is the solution...

Aquaculture is Part of the Problem 3-4 kg of wild fish to culture 1 kg of salmon 5 kg of wild fish for 1 kg of cod 20 kg of wild fish for fattening of 1 kg of tuna More Aquaculture means less wild fish for human consumption

Three Simple Steps from CFP to C ommon S ense F isheries P olicy 1.Let them spawn –Size at first maturity is known for all stocks 2.Let them grow –Size of maximum yield per recruit is known for all stocks and is slightly beyond size at maturity 3.Let some live –Old, large fish produce more eggs, have better genes, and provide an insurance against recruitment failures

CSFP

Common Sense Fisheries Policy Agree on biology of stock: maturity, spawning time and area, productivity Agree on percentage of first-time spawners to be caught (10 – 50 %) Determine annual number of first time spawners by survey on spawning grounds Allow fishing of first-time spawners after spawning season Provide strong incentives for catching only fish of the desired size (mix of Policy Instruments) Only import mature fish

Thank You More information: Froese, R Keep it simple: three indicators to deal with overfishing. Fish and Fisheries 5:86-91 Froese, R Keep fishery management simple. ICES Newsletter 41:9-10 Copies available from