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Titolo:
Persistent organochlorine pollutants in eggs of colonial waterbirds from Galveston Bay and East Texas, USA
Autore:
Frank, DS; Mora, MA; Sericano, JL; Blankenship, AL; Kannan, K; Giesy, JP;
Indirizzi:
Texas A&M Univ, US Geol Survey, TAMU 2258, College Stn, TX 77843 USA TexasA&M Univ College Stn TX USA 77843 U 2258, College Stn, TX 77843 USA Texas A&M Univ, Dept Wildlife & Fisheries Sci, TAMU 2258, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 U 2258, College Stn, TX 77843 USA Texas A&M Univ, Geochem & Environm Res Grp, TAMU 2258, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 U 2258, College Stn, TX 77843 USA Michigan State Univ, Natl Food Safety & Toxicol Ctr, Dept Zool, E Lansing,MI 48824 USA Michigan State Univ E Lansing MI USA 48824 t Zool, E Lansing,MI 48824 USA Michigan State Univ, Inst Environm Toxicol, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 xicol, E Lansing, MI 48824 USA
Titolo Testata:
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
fascicolo: 3, volume: 20, anno: 2001,
pagine: 608 - 617
SICI:
0730-7268(200103)20:3<608:POPIEO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORMORANTS PHALACROCORAX-AURITUS; CROWNED NIGHT-HERONS; FISH-EATING BIRDS; GREAT-LAKES; 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN EQUIVALENTS; ENVIRONMENTAL CONTAMINANTS; REPRODUCTIVE SUCCESS; PCBS; PESTICIDES; CONGENERS;
Keywords:
Galveston Bay, Texas, USA; polychlorinated biphenyls; dioxins; chlorinated pesticides; colonial waterbirds;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Mora, MA Texas A&M Univ, US Geol Survey, TAMU 2258, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 ollege Stn, TX 77843 USA
Citazione:
D.S. Frank et al., "Persistent organochlorine pollutants in eggs of colonial waterbirds from Galveston Bay and East Texas, USA", ENV TOX CH, 20(3), 2001, pp. 608-617

Abstract

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 use of relative potencyfactors (TEQs) or the H4IIE-luc bioassay TCDD-EQs. Concentrations of 1,1,-dichloro-2,2-bis(p-chlorophenyl)ethylene (DDE) were greater in eggs of neotropic cormorants from Alexander Island (mean = 1,040 ng/g wet wt) in the Houston Ship Channel (Houston, TX, USA) and in those from Telfair Island (mean = 1,460 ng/g wet wt), a reference location outside the bay, than in most locations inside the bay (mean range = 119-453 ng/g wet wt). Mean PCB concentrations were greater in eggs of neotropic cormorants from Alexander Island (mean = 5,720 ng/g wet wt) than in eggs of cormorants from areas farther away from the ship channel, including two reference sites outside the bay (mean range = 404-3,140 ng/g wet wt). The TCDD was the main dioxin congener detected in eggs from all locations within Galveston Bay. Instrumental TEQsin eggs ranged from 67 pg/g wet weight at control sites to 452 pg/g wet weight at Alexander Island. Concentrations of TCDD-EQs determined in the H4IIE assay were correlated with instrumental TEQs and were greater in eggs of cormorants from islands within the bay, although these were farther away from the ship channel. Overall, concentrations of DDE, PCBs, TCDD, and TODD-EQs were less than the threshold levels known to affect reproduction. However, some eggs contained concentrations of total PCBs or DDE greater than what would elicit adverse effects on birds. No identifiable deformities or abnormalities were detected in embryos collected from all sites.

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Documento generato il 01/12/20 alle ore 22:44:49