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Unformatted text preview: DDT is good for Me o Agricultural yields increased o Malaria eradicated in North America and Europe o Worldwide malaria reduced from 192 to 7 per 100,000 Why so effective? o Toxic to many insects, less to mammals o Fat soluble, doesnt wash away with water o Persistent (not easily broken down) o Cheap and easy to apply o Birds Colonies of gulls began to decline in 1960s Many predatory birds declines Reproductive failure: interferences with egg shell development o Why are predatory birds most affected? Bioaccumulation an increase in concentration as you go up the food chain DDT accumulates in fatty tissues...
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This note was uploaded on 11/18/2011 for the course BIO 105 taught by Professor Adler,irschick,podos during the Fall '08 term at UMass (Amherst).
- Fall '08