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An Introduction to the World's Oceans, 10/e
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The Nekton: Free Swimmers of the Sea

Internet Exercises
Use the Endangered Species web page of the NOAA Fisheries web site to answer the following questions. Under the heading "Listed Species," click on the "Threatened and Endangered" link. Explain the difference between a threatened and an endangered species as defined by the Endangered Species Act of 1973.
There are currently 19 marine species on the Domestic Endangered Species list. Determine how many of these are from each of the following groups: Sea Turtles, Marine and Anadromous Fish, Cetaceans, and Pinnipeds. Use the back button on your browser to return to the "Endangered Species web page" where you can find information about species that belong to the groups listed above.
Read through the information regarding the Marine Mammal Protection Act on the NOAA Fisheries, Protected Resources web site. Give five main points of the Marine Mammal Protection Act. Why was it necessary to develop the MMPA? Has it had a significant result?
Select "Aquaculture" and then "National Aquaculture Act of 1980." What is the purpose of the National Aquaculture Act? How does aquaculture impact the world food resources? What organisms are currently grown as aquaculture organisms?