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Ocean Fisheries

Ocean Fisheries. Us and fish. Do Now – Watch and Take Notes. The history of the Newfoundland Cod Fishery http:// www.youtube.com/watch?v=3fCX6XKzbUY. Questions:. How many people in Newfoundland lost their jobs? How would the equivalent of that job loss affect the city of Chicago?

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Ocean Fisheries

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  1. Ocean Fisheries Us and fish

  2. Do Now – Watch and Take Notes • The history of the Newfoundland Cod Fishery • http://www.youtube.com/watch?v=3fCX6XKzbUY

  3. Questions: • How many people in Newfoundland lost their jobs? • How would the equivalent of that job loss affect the city of Chicago? • Who else was affected by the fishery collapse? • What type of economic ripple effect do you think the loss of this resource had on people? Think beyond the fisherman.

  4. Case Study: Newfoundland Cod Overfishing Impacts Everyone

  5. Tragedy of the Commons Theory developed by Garrett Hardin in 1968 Definition: The depletion of a shared resource by individuals, acting independently and rationally according to each one's self-interest, act contrary to the group's long-term best interests by depleting the common resource. Turn and talk: Explain this definition to each other and re-write in your own words AND come up with an example (other than fishing)

  6. Tragedy of the Commons When individuals don’t think about all parties involved and utilize an apparently abundant resource to extinction.

  7. Importance of Healthy Fish Populations – For Humans • Fish provide 20% of the protein consumed by 2.6 billion people in developing countries (Hauge et al, 2009) • An Est. 150 billion people world-wide are employed in the fishing industry (Hauge et al, 2009) • $71.5 Billion was made in export and sale of fish and fish products in 2004. • Eco-Tourism impacted by ripple effect of species loss due to one population collapse

  8. Importance of Healthy Fish Populations – For Humans SUMMARY: • Loss of major food source in many countries • Equivalent of nearly every fast food restaurant suddenly closing and nothing replacing them. • Loss of economic stability • Job loss – 150 billion unemployed world-wide • $71.5 billion revenue loss world-wide • Economic Instability = Social Instability

  9. Developing Nations Fishing Boats Developed Nations Fishing Trawlers

  10. Impacts of Overfishing on Biodiversity and Ecosystems • Loss of major predators (like cod) causes shifts in population and changes in ecosystems (Haute et al, 2009) • Migration routes of fish change due to loss of older fish and behavioral changes to adapt to smaller school sizes. • Current fishing practices lead to high volume “bycatch” (unwanted fish). • Trawling can cause damage to 20-80% of marine fauna effectively destroying sea floor habitats. (Nellemann et al, 2008:10). • Loss of biodiversity causes increases in both algae blooms (red tide) and oxygen depletion. (Jackson et al, 2001).

  11. Impacts of Overfishing on Biodiversity and Ecosystems http://youtu.be/ulucJnxT7B4?t=20s

  12. Impacts of Overfishing on Biodiversity and Ecosystems SUMMARY • Impacts predator/prey relationships causing booms or crashes in non-fished populations • Causes changes in evolution, behavior and migratory patterns of current fish populations • Fishing practices negatively impact non-target fish and habitat of fish • Leads to increases in algae blooms and oxygen depletion

  13. Untrawled Seabed VS Trawled Seabed

  14. Exit Slip On a half sheet of paper with your name on it, answer the following questions: • What is the Tragedy of the Commons, in your own words. • Which of the human impacts to overfishing do you think is most concerning? And Why? • Which of the biological impacts to overfishing do you think is most concerning? And Why?

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