• Marine Food Resources: • Fisheries: Highly useful source of human nutrition (about 4% of human protein source) • Fishes (sardine, herring, anchovy, mackerel, salmon, tuna, cod, flounder etc.) • Mollusks (shelled creatures: oysters, mussels, clams; and squids/octopus) • Crustaceans (crabs, shrimps, and lobsters) • Economic Impact: 15 million jobs;
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Marine Food Resources: Fisheries: Highly useful source of human nutrition (about 4% of human protein source) Fishes (sardine, herring, anchovy, mackerel,
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• Marine Food Resources:
• Fisheries: Highly useful source of human nutrition (about 4% of human protein source)
•High Technology, Global scale fisheries are now well established but:
•cost/unit has increased •annual harvests are declining and per capita catch is rapidly declining catch is decreasing, population continues to increase
•1999 - $224 billion spent to generate $70 billion in fish
Peru Sardine
Pacific herring and mackeral
•Impact of global warming •Maximum Sustainable Yield: fundamental concept for renewable resource exploitation:
•Over fishing => depletion of breeding stock below that required for replenishment of the species -
•North Atlantic Cod fishery •Pacific Northwest Salmon (E&S) and King crab fishery
•Bycatch: discarded catch of non-selective fishing gear
•Tragedy of the Commons •Depleted fisheries cause fisherman to increase harvest, which further depletes fisheries which causes fisherman to increase harvest, which further depletes fisheries, etc. etc...... •"The tragedy of the commons"
•Benefits are reaped by the individual •Costs are shared communally
•No incentive to conserve •Only solution -
•informed populace - Communication, •scientifically understood population and •regulations, incentives (to help the resource) •universal acceptance •monitoring and enforcement