| Abstract: | Previous research reported that concentrations of selenium in the livers of 88a??95% of lesser scaup from locations in Lake Erie, Lake St. Clair, and Lake Michigan, USA were either elevated (10a??33 A?g/g dry weight [dw]) or in the potentially harmful range (>33 A?g/g dw). In order to determine the geographic extent of these high selenium concentrations, we collected lesser scaup in Louisiana, Arkansas, Illinois, Minnesota, Wisconsin, and Manitoba and analyzed the livers for 19 trace elements. We found that all trace element concentrations, except for selenium, generally were low. Arsenic, which usually is not detected in liver samples, was detected in Louisiana and may be related to past agricultural usages. Chromium, which also is not usually detected, was only present in lesser scaup from Arkansas and may be related to fertilizer applications. Cadmium and mercury concentrations did not differ among locations and concentrations were low. Selenium concentrations in Arkansas (geometric mean=4.2 A?g/g dw) were significantly lower than those in Louisiana (10.7 A?g/g dw), Illinois (10.5 A?g/g dw), and Minnesota (8.0 A?g/gdw); concentrations in Wisconsin and Manitoba were intermediate (6.6 and 6.5 A?g/g dw). About 25% of lesser scaup livers contained elevated selenium concentrations; however, none were in the harmful range. We concluded that selenium concentrations in lesser scaup in the Mississippi Flyway are elevated in some individuals, but not to the extent that has been documented in the industrial portions of the Great Lakes. |
| Genre: | Article |
| ProdID: | 1002983 |
| Citation Author: | Custer, C. M.; Custer, T. W.; Anteau, M. J.; Afton, A. D.; Wooten, D. E. |
| Citation Contributing Office: | Upper Midwest Environmental Sciences Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 54 |
| Citation Issue: | 1-4 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Ecotoxicology |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 8 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | pp. 47-54 |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Trace elements in lesser scaup (Aythya affinis) from the Mississippi flyway; 2003; Article; Journal; Ecotoxicology; Custer, C. M.; Custer, T. W.; Anteau, M. J.; Afton, A. D.; Wooten, D. E. |
| Citation Start Page: | 47 |
| Citation Volume: | 12 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Trace elements in lesser scaup (Aythya affinis) from the Mississippi flyway; 2003; Article; Journal; Ecotoxicology; Custer, C. M.; Custer, T. W.; Anteau, M. J.; Afton, A. D.; Wooten, D. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (INDEX PAGE): | http://www.springerlink.com/content/v1l63l4744831q75/ |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
| Publisher: | |
