| Abstract: | We determined polychlorinated biphenyls (pcbs) in emergent mayflies (hexagenia bilineata) from a 1250-km reach of the upper mississippi river (umr). Total pcb concentrations (sum of 125 congeners) ranged from 0.21 To 4.1 Mu g/g of dry weight (1.2-29 mu g/g of lipid weight). Concentrations were highest in pools near the twin cities and the quad cities metropolitan areas. Longitudinal movement of pcbs was extensive downstream from the twin cities (175-320 km) but was not apparent downstream from the quad cities. The pcb composition of mayflies was relatively homogeneous throughout most of the river. However, the congener composition in mayflies from two distant locations differed markedly from the other samples and contained a greater abundance of lower molecular weight congeners. Recent pcb discharges from point and nonpoint sources may account for these differences. Emergent mayflies seem to be a useful indicator of pcb contamination of the umr. |
| Genre: | Article |
| ProdID: | 1003508 |
| Citation Author: | Steingraeber, M. T. ; Schwartz, T. R. ; Wiener, J. G. ; Lebo, J. A. |
| Citation Contributing Office: | Upper Midwest Environmental Sciences Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 714 |
| Citation Issue: | 4 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Environmental Science and Technology |
| 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. 707-714 |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | National Biological Service |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Polychlorinated biphenyl congeners in emergent mayflies from the upper Mississippi River; 1994; Article; Journal; Environmental Science and Technology; Steingraeber, M. T. ; Schwartz, T. R. ; Wiener, J. G. ; Lebo, J. A. |
| Citation Start Page: | 707 |
| Citation Volume: | 28 |
| Citation Year: | 1994 |
| Type: | citation/reference |
| Text: | Polychlorinated biphenyl congeners in emergent mayflies from the upper Mississippi River; 1994; Article; Journal; Environmental Science and Technology; Steingraeber, M. T. ; Schwartz, T. R. ; Wiener, J. G. ; Lebo, J. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | National Biological Service |
