| Abstract: | Black-crowned night-heron (Nvcticorax nvcticorax) pipping embryos were studied from undisturbed (Chincoteague National Wildl ife Refuge, VA) and industrialized (Cat Island, Green Bay WI, and Bair and W. Marin Islands, San Francisco Bay, CA) locations. Hepatic aryl hydrocarbon hydroxylase (AHH) , ethoxyresorufin-O-dealkylase, (EROD), benzyloxyROD (BROD), pentoxyROD (PROD) and ethoxycoumarinOD (ECOD) activities and burdens of organochlorines (embryo + yolk sac - liver) were quantified. AHH, BROD, ECOD and EROD were induced up to 100-fold (P<.O5) in embryos from Cat Island compared to the other sites. Greatest burdens of total PCBs and p,p?DDE were detected in Cat Island embryos. Monooxygenase activities (AHH, BROD, ECOD and EROD) and PCB concentrations were significantly correlated (r=O.50 to 0.72). These and other data indicate that monooxygenases may be rapid and inexpensive biomarkers of exposure to some PCB congeners. Current efforts include determination of PCB congeners and other contaminants in these embryos, additional characterization of the induced P-450 isozymes, and expanding the study to include heron embryos and nestlings at other estuaries. |
| Genre: | Article |
| ProdID: | 5224013 |
| Citation Author: | Rattner, B.A.; Melancon, M.J.; Custer, T.W.; Hothem, R.L.; King, K.A.; LeCaptain, L.J.; Spann, J.W. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation Language: | English |
| Citation Larger Work Title: | Society of Environmental Toxicology and Chemistry, annual meeting abstract book |
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| Citation Phsyical Description: | 86 (abstract no. 344) |
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| Citation Search Results Text: | Monooxygenase activity and contaminant burdens of pipping heron embryos in Virginia, the Great Lakes and San Francisco Bay; 1991; Article; Journal; Society of Environmental Toxicology and Chemistry, annual meeting abstract book; Rattner, B.A.; Melancon, M.J.; Custer, T.W.; Hothem, R.L.; King, K.A.; LeCaptain, L.J.; Spann, J.W. |
| Citation Start Page: | 86 (abstra |
| Citation Volume: | 12 |
| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | Monooxygenase activity and contaminant burdens of pipping heron embryos in Virginia, the Great Lakes and San Francisco Bay; 1991; Article; Journal; Society of Environmental Toxicology and Chemistry, annual meeting abstract book; Rattner, B.A.; Melancon, M.J.; Custer, T.W.; Hothem, R.L.; King, K.A.; LeCaptain, L.J.; Spann, J.W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 16 Jun 2010 12:18 -0500 |
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