NATIONWIDE RESIDUES OF ORGANOCHLORINE COMPOUNDS IN WINGS OF ADULT MALLARDS AND BLACK DUCKS, 1979-80

  • 1 January 1981
    • journal article
    • research article
    • Vol. 15  (3) , 128-134
Abstract
Organochlorine residues in wings of adult mallards (A. platyrhynchos) and black ducks (A. rubripes) were monitored nationwide from birds harvested during the 1979-1980 hunting season. DDE residues were found in all samples. DDT residues had declined from levels reported in 1976 on a flyway basis but the decline was significant (P < 0.05) only in the Pacific Flyway. Levels of DDT, DDE, TDE and dieldrin were low on a flyway basis, and all but DDE declined significantly (P < 0.05) in the percent occurrence. Polychlorinated biphenyls (PCB) levels were lower in mallard wings from all flyways compared with 1976 data, but percent occurrence had significantly (P < 0.05) increased. Pools from Alabama and New Mexico [USA] continued to show higher DDE residues than pools from other areas.

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