You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Organochlorine Residues and Shell Thinning in Oregon Seabird Eggs
Charles J. Henny, Lawrence J. Blus and Richard M. Prouty
Vol. 63, No. 1 (Spring, 1982), pp. 15-21
Published by: Society for Northwestern Vertebrate Biology
Stable URL: http://www.jstor.org/stable/3535474
Page Count: 7
You can always find the topics here!Topics: Eggs, Eggshells, Petrels, Polychlorinated biphenyls, Sea birds, Species, Coasts, Pesticides, Haystacks, Geometric mean
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
A single egg was collected at 62 nests of 10 seabird species from Oregon in 1979. The eggs were analyzed for organochlorine contaminants; contemporary shell thickness was compared with eggshells collected during earlier time periods. Concentrations of DDE and PCB's in 1979 were generally low with the most contaminated species being the Double-crested Cormorant (Phalacrocorax auritus), Leach's Storm Petrel (Oceanodroma leucorhoa), and Forktailed Storm Petrel (O. furcata). Limited eggshell data provide evidence that shell thinning was more severe along the Oregon coast in the 1950's than in 1979. With the possible exception of the Fork-tailed Storm Petrel, the residues in 1979 posed no known threat to the welfare of the species.
The Murrelet © 1982 Society for Northwestern Vertebrate Biology