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The blue economy: new threats and opportunities to sustainable use of marine resources

The blue economy: new threats and opportunities to sustainable use of marine resources . Gillian Cambers, SPC, GCCA: PSIS project. Outline. 1. Regional vulnerability assessment 2. How will climate change affect fisheries and aquaculture resources? 3. How will these changes affect

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The blue economy: new threats and opportunities to sustainable use of marine resources

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  1. The blue economy: new threats and opportunities to sustainable use of marine resources Gillian Cambers, SPC, GCCA: PSIS project

  2. Outline 1. Regional vulnerability assessment 2. How will climate change affect fisheries and aquaculture resources? 3. How will these changes affect economic development and food security and how should we adapt?

  3. 1. Approach used Projected changes to atmospheric and oceanic conditions Ecosystems supporting fish Fish stocks Implications for economic development, food security and livelihoods Adaptations, policies and investments needed to maintain productivity

  4. Vulnerability assessment • 88 authors • 36 institutions • Summary for policy makers http://www.spc.int/climate-change/fisheries/assessment/

  5. 2. How will climate change affect fisheries and aquaculture resources • Tuna • Coral reef fish • Freshwater fish • Coastal aquaculture • Pond aquaculture

  6. Projected effects on skipjack tuna A2 emissions scenario • Catch in 2009 • 1.75 million tonnes • ~ USD 2.2 billion 2000 • Effects due to: • Increases in sea surface temperature in eastern Pacific • Shift of prime feeding areas to the east (convergence between the Warm Pool and Pacific Equatorial Divergence Province) 2050 Source: Lehodey et al. (2011)

  7. Effects on skipjack tuna catches Changes relative to 1980-1999 average catch

  8. Projected effects on coral reef fish A2 emissions scenario Today 2035 (-2 to -5%) • Effects due to: • Increased sea surface temperature and more frequent bleaching • Ocean acidification • Greater runoff of nutrients due to higher rainfall • Cyclones of greater intensity 2050 (-20%) 2100 (-20 to -50%)

  9. Effects on freshwater fish catch A2 emissions scenario • Effects due to: • Increased air temperature • Higher flow rates • Increased freshwater habitat

  10. Coastal aquaculture commodities A2 emissions scenario • Pearls • Shrimp • Seaweed • Marine ornamentals • Effects due to: • Increased sea surface temperature • Ocean acidification • Greater runoff of nutrients • Sea-level rise • More-intense cyclones

  11. Pond aquaculture commodities • Tilapia A2 emissions scenario • Effects due to: • Increased surface air temperature (faster growth rates in ponds) • Higher rainfall (more places to build ponds)

  12. Summary of changes in production A2 emissions scenario

  13. 3. How will these changes affect economic development and food security and how should we adapt?

  14. Key points • Small PICTs in east with greatest dependency on tuna should receive additional benefits! • Losses of revenue and GDP occur mainly in large PICTs in west where tuna makes a relatively low contribution to economic development (due to size of economies)

  15. How should PICTs adapt? • To reduce the threats • To harness the opportunities

  16. Adaptations (economic development) ‘Vessel Days Scheme’ to manage effort of industrial tuna fleets • Skipjack tuna move 2000-3000 km along the equatorial Pacific , depending on ENSO events • The vessel day effort management scheme allows the fleet to follow the fish and ensures that all PNA countries still receive some benefits Vessel owners fishing in PNA waters can purchase and trade fishing days depending on the location of the tuna. VDS has potential to be modified regularly to accommodate movement of tuna to the east Ask

  17. Adaptations (economic development) Energy audits of industrial fishing vessels • Addresses likelihood of near-term rises in fuel costs • Will assist national fleets from PNG and Solomon Islands that may have to go greater distances in the future to catch fish for their canneries

  18. How could changes to coastal fisheries affect fish available for food security? • Plans are to provide 35 kg of fish per person per year as populations grow • Maintain traditional fish consumption where it is >35 kg

  19. Where will the fish come from? • By increasing access of coastal communities to tuna

  20. Only tuna can fill the gap Fish needed for food security tonnes (x1000) Coastal fisheries Freshwater fisheries Pond aquaculture Tuna (and bycatch)

  21. Adaptations (food security) • Restore and sustain fisheries and their habitats • Increase access to tuna for subsistence fishers with low-cost, inshore Fish • Aggregating Devices (FADs) • Store and distribute low value tuna and bycatch from industrial fleets to urban areas • Develop pond aquaculture

  22. Summary Economic development • East gains, where PICTs have high dependence, west has loses but effects on GDP are small Food security • Contribution of coastal fisheries will decrease, but gap can be filled mainly by tuna • Pond aquaculture favoured by climate change

  23. Summary Adaptations • Win-win adaptations available for economic development and food security • Adaptations need to be implemented urgently for coastal fisheries to reduce natural and man made impacts and build resilience to climate change

  24. Many Acknowledgements

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