Cytochrome P450 and organochlorine contaminants in black-crowned night-herons from the chesapeake bay region, USA

摘要

Black-crowned night-heron (Nycticorax nycticorax) offspring were collected from a relatively uncontaminated coastal reference site (next to Chincoteague National wildlife Refuge, VA, USA) and two sites in the Chesapeake Bay watershed (Baltimore Harbor, MD and Rock Creek Park, Washington, DC, USA). Hepatic microsomal activities of benzyloxyresorufin-O-dealkylase and Ethoxyresorufin-O-dealkylase were significantly elevated (up to sixfold and ninefold induction, respectively) in pipping embryos From the Baltimore Harbor colony compared to the reference site, whereas values in embryos from the Rock Creek Park colony Were intermediate.