CYTOCHROME P450 AND ORGANOCHLORINE CONTAMINANTS IN BLACK-CROWNED NIGHT-HERONS FROM THE CHESAPEAKE BAY REGION, USA

Health assessment of Black-crowned Night-herons (Nycticorax nycticorax) of the New York Harbor estuary.

Blood samples from 145 Black-crowned Night-heron (Nycticorax nycticorax, BCNH) chicks (mean age 3 weeks) were taken from four island colonies (Goose (2004), Canarsie Pol (2005), Hoffman (2004 and 2005) and North Brother (2004 and 2005)) in New York Harbor in 2004 and 2005 to establish baseline health reference ranges for this species and to compare health indices of birds reared on different is...

Organochlorine Contaminants and Reproductive Success of Double-crested Cormorants from Green Bay, Wisconsin, Usa

In 1994 and 1995, nesting success of double-crested cormorants (Phalacrocorax auritus) was measured at Cat Island, in southern Green Bay, Lake Michigan, Wisconsin, USA. Sample eggs at pipping and unhatched eggs were collected and analyzed for organochlorines (including total polychlorinated biphenyls [PCBs] and DDE), hepatic microsomal ethoxyresorufin-O-dealkylase (EROD) activity in embryos, an...

Ecology and contaminant exposure of Lake Calumet Black-crowned Night Herons: Population Levels and Nesting Ecology Final Report

We examined a suite of organic and inorganic analytes in a sample of Black-crowned NightHeron (BCNH) embryos collected from a colony located adjacent to Lake Calumet in southeastern Chicago, Illinois, in 2002. Our objectives were to determine whether embryos from the Lake Calumet colony had greater exposure to environmental contaminants, when compared to samples from other contemporary populati...

Evaluation of Contaminants in Black-crowned Night Heron Eggs From Barnstable County, MA and Richmond County, NY

Age, Growth, and Mortality of Black Drum, Pogonias cromis, in the Chesapeake Bay Region

-we used otolith ageing to describe the population dynamics of black drum, Pogonias cromis, collected over a three-year period from the Chesapeake Bay region's commercial and recreational fisheries. Black drum average age, total length, and weight were 26 years, 109.5 cm, and 22.1 kg respectively. The oldest fish was 59 years and fish older than 50 years were present in the catch from 1990 to 1...