| chlorinated hydrocarbons and biomarkers of exposure in wading birds and fish of the lower rio grande valley, texas. | during 1997 we evaluated reproductive success in colonial water birds nesting in the lower rio grande valley (lrgv), texas, and correlated success with concentrations of contaminants in eggs. we also measured steroid hormones and gonadosomatic index (gsi) as biomarkers of endocrine effects in common carp (cyprinus carpio). nest and fledging success of green herons (butorides virescens) and great egrets (ardea alba) were similar to those found in other parts of north america; however, nesting suc ... | 2001 | 11116345 |
| persistent organochlorine pollutants in eggs of colonial waterbirds from galveston bay and east texas, usa. | 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 polychlorinated dibenzofurans. additionally, concentrations of 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (tcdd-eqs) were determined by ... | 2001 | 11349863 |