| organochlorine contaminant exposure and reproductive success of black-crowned night-herons (nycticorax nycticorax) nesting in baltimore harbor, maryland. | the declining size of the baltimore harbor black-crowned night-heron (nycticorax nycticorax) colony has been hypothesized to be linked to polychlorinated biphenyl (pcb) exposure. in 1998, a "sample egg" was collected from 65 black-crowned night-heron nests (each containing > or = three eggs) for contaminant analysis, and the remaining eggs in these 65 nests, plus four two-egg nests, were monitored for hatching and fledging success. eggs were also collected from 12 nests at holland island, a refe ... | 2001 | 11385592 |
| element patterns in feathers of nestling black-crowned night-herons, nycticorax nycticorax l., from four colonies in delaware, maryland, and minnesota. | the pattern of elements in nestling black-crowned night-heron feathers from a rural minnesota colony differed from colonies in industrialized regions of maryland and delaware. except for chromium, however, the differences did not reflect the elements associated with waters and sediments of the maryland and delaware colonies. therefore, elements in water and sediment do not necessarily bioaccumulate in night-heron feathers in relation to potential exposure. although trace element patterns in feat ... | 2008 | 18496631 |