{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Christine M Custer", "hasEmail": "mailto:ccuster@usgs.gov"}, "description": "Double-crested cormorant (Phalacrocorax auritus) fresh eggs and sibling embryos at pipping were collected from a polychlorinated biphenyl (PCB)- contaminated colony in Green Bay, Wisconsin, USA. Egg contents were analyzed for organochlorine (OC) contaminants, including 15 aryl hydrocarbon-active PCB congeners. Concentrations of 20 organochlorine contaminants present in double-crested cormorant eggs and nestlings from the upper Midwest, including the Green Bay system, are presented in this data report and include alpha-, beta-, gamma- and delta-hexachlorocyclohexane (HCH); alpha- and gamma-chlordane; oxychlordane; cis-nonachlor; trans-nonachlor; dieldrin; endrin; hexachlorobenzene (HCB); heptachlor epoxide; mirex; toxaphene; o,p-dichlorodiphenyldichloroethane(DDD); o,p-dichlorodiphenyldichloroethylene (DDE); o,p-dichlorodiphenyltrichloroethane (DDT); p,p-DDD; p,p-DDE; p,p-DDT; and total PCBs. Total PCBs were estimated based on Aroclor equivalents. See Environmental Toxicology and chemistry publications noted elsewhere for additional information. QA/QC were approved by the Patuxent Analytical Control Facility, Laurel, MD.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P1KGUVKR", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.66040f9cd34e64ff1549146c.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_66040f9cd34e64ff1549146c", "keyword": ["Double-crested cormorant", "Green Bay, WI", "Phalacrocorax auritus", "USGS:66040f9cd34e64ff1549146c", "biota", "birds", "double-crested cormorants", "organochlorine contaminants"], "modified": "2026-04-24T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-99.1187, 42.6178, -86.7480, 48.5893", "theme": ["geospatial"], "title": "Organochlorine contaminant concentrations in double-crested cormorant eggs or nestlings in the Green Bay, WI region from 1994 and 1995"}