| blood lead concentrations of waterfowl from unhunted and heavily hunted marshes of nova scotia and prince edward island, canada. | blood lead concentrations of juvenile american black ducks (anas rubripes) sampled in unhunted sanctuaries of nova scotia (ns) and prince edward island (pei), canada, usually were < 30 parts per billion (ppb). based on gizzard content analyses of juvenile american black ducks from hunted areas, eight (24%) of 33 flightless birds contained ingested lead shot. blood lead concentrations were > or = 100 ppb in seven of eight juveniles with ingested shot; thus we adopted blood lead concentrations 100 ... | 1993 | 8258857 |