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Ocean Resources

Ocean Resources. Fishing Shipping Oxygen Production Ocean Resources Tourism Climate Buffer Mining. Fishing. Fish supply about 16% of the world’s protein. Methods – nets, trawlers, longlining, gillnetting, diving. Fishing. Gillnetting Longlining Trawling . Fishing.

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Ocean Resources

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  1. Ocean Resources

  2. FishingShippingOxygen Production Ocean Resources TourismClimate BufferMining

  3. Fishing • Fish supply about 16% of the world’s protein. • Methods – nets, trawlers, longlining, gillnetting, diving

  4. Fishing • Gillnetting • Longlining • Trawling

  5. Fishing • 60% of fish are used to feed people • 40 % are used food for fish on fish farms and other fish in captivity and fish oil

  6. Fishing – Our Impact • Over fishing – we have caught too many fish • We need to determine the “carrying capacity” of the ocean – how many of each type of fish should there be? • We need to develop sustainable fishing practices – fisheries are limited in how many fish and what size of fish they can catch • Habitat destruction • Pollution

  7. Shipping • “moving cargo with ships between seaports” • Ships used include: • Tankers • Container ships • Cable layers • Ferries • Car carriers • Barges

  8. Shipping • Should be low impact but… • Accidents happen • Pollution from ships – air and water • Organisms are carried to new habitats in ballast water and introduced into new habitats • Ships can hit animals

  9. Tourism • Provides a great deal of income world wide – in the use $478 billion • Problems: • Construction of resorts destroys habitat • Pollution (sewage) • Activities destroy habitats • Overexploitation of local seafood

  10. Mining • Provides – diamonds, gold, silver, and manganese • Destroys ecosystems – sediments are dredged up, killing animals living in it and interferes with photoplankton

  11. Climate Buffer • The ocean holds and circulates water and heat. • The ocean and atmosphere interact to produce weather – the air gets heat and moisture from the oceans • Air temperatures worldwide are regulated by the circulation of heat by the oceans

  12. Oxygen Production • Phytoplankton provide as much as 90% of the world’s oxygen – • Some is dissolved into the ocean water • Some goes into the atmosphere

  13. Human impact • How_the_Actions_of_Humans_Threaten_Our_Oceans.asf

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