organochlorine insecticide residues in ducklings and their dilution by growth.residues of ddt, ddd, dde, and dieldrin in 7 species of ducklings from alberta, canada, were measured. levels of ddt and metabolites ranged from 0 to 36.48 ppm in fat of 96% of the birds and from 0 to 0.97 ppm im muscle from 67% of the birds. residue levels of dieldrin ranged from 0 to 2.62 ppm in fat and from 0 to 0.11 ppm in muscle of 43 and 19% of the birds, respectively. growth dilution was considered to be the most significant factor in reducing the insecticide residue levels in the ducklin ...1976963316
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