Premature Births in California Sea Lions: Association with High Organochlorine Pollutant Residue Levels

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Science  21 Sep 1973:
Vol. 181, Issue 4105, pp. 1168-1170
DOI: 10.1126/science.181.4105.1168


Premature pupping in California sea lions has been noted on the breeding islands since 1968. Organochlorine pesticides and polychlorinated biphenyl residues were two to eight times higher in tissues of premature parturient females and pups than in similar tissues of full-term parturient females and pups collected on San Miguel Island in 1970.