Eggshell thinning, chlorinated hydrocarbons, and mercury in inland aquatic bird eggs, 1969 and 1970

Journal Article · Fri Jun 01 04:00:00 EDT 1973 · Pestic. Monit. J.; (United States)

OSTI ID:6165100

Faber, R A; Hickey, J J

In the Upper Great Lakes States, 9 out of 13 species of fish-eating birds were found in 1969-70 to have sustained statistically significant decreases in eggshell thickness since 1946. Heron eggs taken in Louisiana generally displayed a smaller post-46 change than herons in the Middle West. On a lipid basis, mean PCB- and DDE-residue levels exceeded 100 ppm in 7 out of 13 species in the Great Lakes States, and in 2 of 7 species in Louisiana, the average DDE:PCB ratios in the two regions being 1.25:1 and 3.9:1, respectively. Individual dieldrin values tended to be higher in Louisiana (31.6 and 13.95 ppm in heron species from two different locations), although values reached 10.1 and 9.4 ppm in great blue and black-crowned night herons in Wisconsin. BHC averaged 3.01 and 0.39 ppm in the Lake States and Louisiana, respectively. Of eggs examined for mercury, 29% had levels greater than 0.5 ppm, and 9% greater than 1.0 ppm on a wet-weight basis. Mercury levels in a small sample of eggs from Louisiana were consistently low. The differences in mercury levels between the two regions thus were similar to those found for the chlorinated hydrocarbons. While DDE was a prominent factor for most groups, especially herons, in relation to the eggshell thinning observed, dieldrin was also important to two groups even though DDE was present in much higher amounts. PCB's were also important to mergansers, while mercury was positively correlated with thickness index in grebes and negatively correlated in mergansers. 33 references, 1 figure, 5 tables.

• Research Organization: Univ. of Wisconsin, Madison
• OSTI ID: 6165100
• Journal Information: Pestic. Monit. J.; (United States), Journal Name: Pestic. Monit. J.; (United States) Vol. 7:1; ISSN PEMJA
• Country of Publication: United States
• Language: English

Related Subjects

560305* -- Chemicals Metabolism & Toxicology-- Vertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
AROMATICS
BIOLOGICAL ACCUMULATION
BIOLOGICAL VARIABILITY
BIRDS
CHLORINATED AROMATIC HYDROCARBONS
CONTAMINATION
DATA
DIELDRIN
DIMENSIONS
ECOLOGICAL CONCENTRATION
EGGS
ELEMENTS
EXPERIMENTAL DATA
FEDERAL REGION V
FEDERAL REGION VI
HALOGENATED AROMATIC HYDROCARBONS
INFORMATION
INSECTICIDES
LOUISIANA
MERCURY
METALS
NORTH AMERICA
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PESTICIDES
RESIDUES
THICKNESS
USA
VERTEBRATES