Eight Grade Science FishingFishing Shipping Oxygen ProductionShippingOxygen Production Ocean Resources TourismTourism Climate BufferMiningClimate BufferMining Fishing Fish supply about 16% of the worlds protein. Methods nets, trawlers, longlining, gillnetting, diving Fishing Gillnetting Longlining Trawling 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 FishingFishing 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 Shipping moving cargo with ships between seaports Ships used include: Tankers Container ships Cable layers Ferries Car carriers Barges 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 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 Mining Provides diamonds, gold, silver, and manganese Destroys ecosystems sediments are dredged up, killing animals living in it and interferes with photoplankton 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 Oxygen Production Phytoplankton provide as much as 90% of the worlds oxygen Some is dissolved into the ocean water Some goes into the atmosphere Tidal and Wave energy The movement of water, both by tides and waves can be harnessed to generate electricity.