Marine Resources Commercial Fishing in Alaska..

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Presentation transcript:

Marine Resources Commercial Fishing in Alaska.

Marine Resources Through History Trade/ Shipping Desalinization Whaling Fur Trade

Renewable Resources Replaced by organisms, the sun or other natural processes Wave Energy Water Desalinization refers to the removal of salts and minerals Fisheries

Non-Renewable Resources Not replaced by natural processes (within a human lifetime) Fossil Fuels Minerals A salt farm.

Biological Resources-are important to society for the various services they provide, as well as problems they may create. Involve Biological Processes Kelp-supplements-iodine Fish-Food Marine Mammals Dolphins-The Cove Seals-oil, food Sea lions-aggressive

Fisheries Typical evolution of ocean fisheries

Physical Resources Do not involve biological processes Oil Natural Gas (Methane) Minerals Energy

Whaling Meat, Blubber Revolutionized in 1868 with harpoon cannon 1960’s – spotter airplanes, sonar 1946 – International Whaling Commission (IWC)

Whaling (con’t.) 1986 – Moratorium Banned because many species were in danger of becoming extinct Whaling still occurs in some places Japan Norway Canada, Alaska, Greenland, Russia

Tuna Fishing 1972 - U.S. Marine Mammal Protection Act 1988 – U.S. Congress banned all tuna imports from nations that do not follow USMMPA-United States Marine Mammal Protection Act Dolphin - Safe Tuna Consumers boycotted tuna from companies that did not practice dolphin-safe fishing.

Human Impact PSA

12.06 How is Algae used commercially? Food (Biological Resource) Algin Thickening Agar

12.07 Mariculture Marine aquaculture/Biotechnology Algae, finfish, shellfish Racks, pens and cages Pros Supplements wild-caught seafood Produces food, cosmetics, pharmaceuticals Provides jobs Cons Crowded Conditions Concentrated Wastes Antibiotics Fish Escapes of genetically modified species/invasives

A coastal fish farm.

An offshore tuna farm.

12.08 Commercial Fishing Fish Markets Grocery Stores Restaurants

12.08 Declining Trends in Various Fisheries Orange Roughy Atlantic Cod Swordfish Atlantic Blue Fin Tuna Sharks Grouper Atlantic Cod (Gadus morhua)

12.09 Maximum Sustainable Yield= Endless Supply? The amount of a resource that can be harvested so that the population can survive for the future OVERFISHING Catching more fish than the maximum sustainable yield

12.10 Factory Ships Large ships that process and package fish at sea Prevent trips inshore for fishing boats More time at sea = more fish caught

The End…