Samples of Roseate Tern eggs were collected in 1981 from 5 of the largest colonies in the northeastern U.S. and from one large colony in the U.S. Virgin Islands. No organochlorine compounds were detected in eggs from the U.S. Virgin Islands. PCBs were found in all eggs and DDE was found in most eggs from the northeastern U.S., but concentrations were substantially lower than in Common Terns from the same colonies. There were no significant correlations between eggshell characteristics and organochlorine concentrations. DDE concentrations in Roseate Tern eggs were well below those reported to induce adverse effects in Common Terns.
Additional publication details
Organochlorine residues and shell characteristics of roseate tern eggs, 1981