PERSISTENT ORGANOCHLORINE POLLUTANTS IN EGGS OF COLONIAL WATERBIRDS FROM GALVESTON BAY AND EAST TEXAS, USA

摘要

Eggs of neotropic cormorants (Phalacrocorax brasilianus), black-crowned night herons(Nycticorax nycticorax), and great egrets(Ardea alba)nesting on several locations in Galveston Bay(TX, USA)and at two control sites outside the bay were collected during April-May 1996 and analyzed for chlorinated pesticides, PCBs, polychlorinated dibenzo-p-dioxins, and polychlor- inated dibenzofurans. Additionally, concentrations of 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents(TCDD-Eqs)were determined by use of relative potency factors(TEQs)or the H4IIE-luc bioassay TCDD-EQs.