| organochlorines in black-crowned night heron (nycticorax nycticorax) eggs reflect persistent contamination in northeastern us estuaries. | colonially nesting aquatic birds can indicate site-specific contamination because they are high-level predators and dependent upon local resources during the breeding season. we compared persistent organochlorine concentrations in black-crowned night heron (nvcticorax nvcticorax) eggs collected in 1992-93 among areas of known contamination (new york harbor, boston harbor, cape cod, and delaware bay) and a reference site (nantucket island) in the northeastern united states (7-16 eggs/site). total ... | 2004 | 15106680 |
| 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 islands. packed cell volume (pcv) and total solids (ts) did not differ among islands in either year. hero ... | 2007 | 17720576 |
| metals in feathers of black-crowned night-heron (nycticorax nycticorax) chicks from the new york harbor estuary. | in heavily urbanized landscapes such as the new york harbor estuary, the local environment is subject to a variety of contamination sources. environmental contaminants such as heavy metals and metalloids pose a risk to wildlife inhabiting the harbor. metal concentrations in feathers indicate exposure and provide insight into the potential adverse effects on birds. in 2004 and 2005 down feathers were collected from 147 black-crowned night heron (nycticorax nycticorax) chicks living on four island ... | 2010 | 20037785 |
| metal levels in eggs of waterbirds in the new york harbor (usa): trophic relationships and possible risk to human consumers. | health professionals are interested in evaluating the risks that heavy metals pose to eco-receptors and humans. the objective of this study was to examine levels of mercury (hg), lead (pb), cadmium (cd), and other contaminants in waterbirds nesting in the new york harbor in 2012 to determine (1) whether there were species and locational differences, and (2) whether consumption of eggs posed a health risk to predators or humans. for arsenic (as), pb, hg, and selenium (se), species contributed mor ... | 2015 | 25424617 |
| immunological and reproductive health assessment in herring gulls and black-crowned night herons in the hudson-raritan estuary. | previous studies have shown inexplicable declines in breeding waterbirds within western new york/new jersey harbor between 1996 and 2002 and elevated polychlorinated dibenzo-p-dioxins and polychlorinated biphenyls (pcbs) in double-crested cormorant (phalacrocorax auritus) eggs. the present study assessed associations between immune function, prefledgling survival, and selected organochlorine compounds and metals in herring gulls (larus argentatus) and black-crowned night herons (nycticorax nycti ... | 2013 | 23212976 |