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Titolo:
ORGANOCHLORINES AND TRACE-ELEMENTS IN 4 COLONIAL WATERBIRD SPECIES NESTING IN THE LOWER LAGUNA-MADRE, TEXAS
Autore:
MORA MA;
Indirizzi:
TEXAS A&M UNIV,DEPT WILDLIFE & FISHERIES SCI,NATL BIOL SERV,MIDWEST SCI CTR COLLEGE STN TX 77843
Titolo Testata:
Archives of environmental contamination and toxicology
fascicolo: 4, volume: 31, anno: 1996,
pagine: 533 - 537
SICI:
0090-4341(1996)31:4<533:OATI4C>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
RIO-GRANDE VALLEY; SOUTH TEXAS; REPRODUCTIVE SUCCESS; BLACK SKIMMERS; AQUATIC BIRDS; RESIDUES; SELENIUM; MERCURY; EGGS; CONTAMINATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
M.A. Mora, "ORGANOCHLORINES AND TRACE-ELEMENTS IN 4 COLONIAL WATERBIRD SPECIES NESTING IN THE LOWER LAGUNA-MADRE, TEXAS", Archives of environmental contamination and toxicology, 31(4), 1996, pp. 533-537

Abstract

Eggs from four aquatic bird species nesting on the National Audubon Sanctuary Islands of the lower Laguna Madre were collected during 1993 and 1994 to determine concentrations of organochlorine compounds and trace metals and to evaluate their possible detrimental effects on birds nesting in this aquatic ecosystem. The only chlorinated hydrocarbonsfound above detection limits were p,p'-DDE (DDE), p,p'-DDT (DDT), HCB, HCH, chlordane, and polychlorinated biphenyls (PCBs). Median DDE andPCB levels in eggs of four species were below 1 mu g/g ww. Concentrations of DDE were much greater (6-70 fold) than the concentrations of other chlorinated pesticides which were present at or near detection limits. One egg from a snowy egret contained 9.65 mu g/g DDE, 0.056 mu g/g DDD, and 1.75 mu g/g DDT. Ten heavy metals and trace elements (Hg, Se, B, Cr, Cu, Fe, Mg, Mn, Sr, and Zn) were detected in 90% of the samples but at levels that were not of concern. In 1993-1994, concentrations of DDE in eggs of aquatic birds of the lower Laguna Madre were much lower than levels detected in this area during the late 1970s and early 1980s. Concentrations of DDE, PCBs, and trace metals in eggs detected in this study could not be associated with deformities or other detrimental effects on birds.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 15:15:24