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Chapter 12: Oceans and the Environment

Chapter 12: Oceans and the Environment. Big Question: Can We Learn to Manage the Oceans’ Resources?. World Fish Production. The Decline of Fish Populations. Death of a Fishery. Case Study: Chesapeake Bay- A fishery disaster in the U.S. Other Problems. Highly polluted farm runoff.

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Chapter 12: Oceans and the Environment

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  1. Chapter 12: Oceans and the Environment Big Question: Can We Learn to Manage the Oceans’ Resources?

  2. World Fish Production

  3. The Decline of Fish Populations

  4. Death of a Fishery Case Study: Chesapeake Bay- A fishery disaster in the U.S.

  5. Other Problems Highly polluted farm runoff. Scientific theory remains inadequate

  6. An Ocean Is Many Habitatsand Ecosystems

  7. Where Are the Fish? Most fish we eat come from continental shelves.

  8. Salmon, Anchovies and Upwellings Managing ocean fisheries is difficult. Salmon illustrate the problems of managing ocean fisheries. Many factors influence their birth and death rates.

  9. Upwelling Ocean Currents Upwelling ocean currents affect smaller fish that salmon eat. They bring nutrients, such as phosphorus, from deep ocean sediments and waters.

  10. Coral Reefs: A Special Problem Reefs are restricted to warm waters and therefore low latitudes.

  11. Coral Reefs at Risk We love them to death. More than half of the remaining coral reefs are considered at risk.

  12. We Pollute the Oceans Our wastes end up in the oceans.

  13. Marine Pollution Marine pollution affects oceanic life in a variety of ways Plastics are dumped into oceans, float with ocean currents, and accumulate in convergent currents (i.e. near the northwestern Hawaiian Islands.

  14. Making Ocean Fisheries Sustainable Problem: much of the open ocean is a “commons.” Managing fisheries: there are four options: 1. Establish a total catch quota. 2. Issue a restricted number of licenses. 3. Tax fish brought in, or the effort. 4. Allocate fishing transfer/selling rights.

  15. Marine Sanctuaries Sanctuaries can be invaluable in helping populations recover.

  16. Aquaculture and Mariculture Fish produced by Aquaculture and Mari (marine) culture

  17. Conservation of Whales andOther Marine Mammals

  18. Dolphins and Other Small Whales Source: Wikipedia

  19. Chapter 12: Oceans and the Environment Questions? Email us at eschelp@u.washington.edu

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