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East Coast MARE Ocean Lecture Jan 19, 2012 - NJ Fisheries in a Global Context
- 1. NJ Fisheries in a Global Context Olaf Jensen Rutgers University
- 2. Outline • Global marine fisheries • Status and trends • Black Sea Bass
- 3. What I mean by a “fishery”
- 4. What I mean by a “fishery” • A social-ecological system organized around the harvest of wild marine/aquatic fish or invertebrates for use by humans. Top 10 world fisheries (weight of landings) Management Fishermen Fish “stocks”
- 5. What I mean by a “fishery” • A social-ecological system organized around the harvest of wild marine/aquatic fish or invertebrates for use by humans. Top 10 world fisheries (weight of landings) FAO 2006 Management Fishermen Fish “stocks”
- 6. World fishery landings peaked in the 1980s FAO 2006
- 7. World fishery landings peaked in the 1980s FAO 2006 …it seems unlikely that the potential sustained yield of fish to man is appreciably greater than 100 million tons. - Ryther 1969, Science
- 8. Illegal, Unreported, Unregulated (IUU) catches and discards are large
- 9. Fishing effort and demand for seafood continue to grow • 4 million fishing vessels • landings worth 84.9 billion USD • 2.6 billion people rely on fish for >20% of their animal protein (1/3 of global population)
- 10. Fishing effort and demand for seafood continue to grow • 4 million fishing vessels • landings worth 84.9 billion USD • 2.6 billion people rely on fish for >20% of their animal protein (1/3 of global population) FAO 2006
- 14. Worm et al. (2006) Science 314:787-790
- 15. ALL FISH GONE BY 2048 Worm et al. (2006) Science 314:787-790
- 16. Source: Time magazine, November 2006
- 18. Outline • Global marine fisheries • Status and trends • Black Sea Bass
- 19. What are the current status and trends of fisheries around the world?
- 20. A global stock assessment database
- 21. Stock status worldwide Worm et al. 2009 Science
- 22. Stock status worldwide Emergency Room Worm et al. 2009 Science
- 23. Stock status worldwide Emergency Room Recovery Room Worm et al. 2009 Science
- 24. Stock status worldwide Emergency Room Recovery Room Worm et al. 2009 Science
- 25. Stock status worldwide Emergency Room Recovery Room Worm et al. 2009 Science
- 26. Stock status worldwide • 166 stocks • 63% below MSY target • 65% fished at rates below UMSY Worm et al. 2009 Science
- 28. Stock status – selected regions updated – 241 assessments New Zealand Canada EuropeUnited States Ricard et al. 2012
- 32. Declining fishing rate and signs of rebuilding • 7 of 10 regions at or below fishing rate that yields MSY • Higher fishing rates in Europe • Biomass still low in most regions • Signs of rebuilding in: – California – Northeast U.S.? – Iceland
- 33. A New Consensus • Overfishing has depleted a significant number of stocks and ecosystems • Solution: reduce fishing pressure to achieve better economic and ecological outcomes • New focus on restoring biodiversity, rebuilding fisheries • High seas and less developed countries remain great challenges
- 37. Outline • Global marine fisheries • Status and trends • Black Sea Bass
- 38. New Jersey Fisheries • Commercial landings in NJ worth about $150 million per year • Cape May – Wildwood is the 8th most important fishing port in the U.S. (by value) • Recreational anglers: 1.2 million in NJ • Recreational fishing impact: $1.6 billion annually
- 40. Black sea bass protogynous hermaphrodites Female Male
- 41. Sex ratio
- 42. Sex ratio
- 43. Sex ratio 1 2 3 4 5
- 45. Black sea bass tagging Moser and Shepherd 2009
- 46. Black sea bass tagging Moser and Shepherd 2009
- 47. How you can help
- 48. Acknowledgments • NCEAS working group participants • Dan Ricard, Coilin Minto, Julia Baum, Malin Pinsky (database development and analysis) • Boris Worm, Liz Neeley, Trevor Branch (presentation slides) • Rainer Froese (FishBase) • Reg Watson (Sea Around Us Project) • Database contributors • NCEAS and David H. Smith Conservation Research Fellowship
- 49. Questions?
Notas del editor
- Source: Trevor Branch
- Source: Trevor Branch
- Trevor Branch (change y-axis)
- Slide from Boris and Ray
- Point three: Contrast how MSA structure is important (timelines and targets) – not present for example in Canada