3-10 Human Impact on Fisheries

3-10 Human Impact on Fisheries - Food fromtheS a e hapte 11...

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Food from the Sea Chapter 11 Topic 24
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Human Impacts on Fisheries Substantial human impacts due to overfishing, eutrophication and pollution on ocean biota Food from the sea worth $55 B in 1995 1% of human food consumption but 10% of the protein Used for human, pet and animal food, fertilizer and industry
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Fisheries include: Clupeids anchovies, herring, menhaden #1 in tons Shallow continental shelf fishery Phytoplankton feeders Large purse seines used Fish meal and fertilizers
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Gadoids: cod, pollack, hake #2 in tons Bottom-dwelling predators Continental shelf and shallow coastal waters Bottom trawls Used in fish burgers and artificial crabmeat
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Tuna and mackerels: #4 in tons Top carnivores in oceanic food webs with 7-8 trophic levels below them Active, cruising fishes that prey on clupeids Purse-seine and long-line fishery Human consumption Dolphins may drown in seines although regulations have reduced mortality
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Other fisheries: Crustaceans mostly estuarine-dependent shrimp
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This note was uploaded on 09/13/2010 for the course BIOL 4262 taught by Professor Stickle during the Spring '10 term at LSU.

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3-10 Human Impact on Fisheries - Food fromtheS a e hapte 11...

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