Polychlorinated biphenyl congeners in emergent mayflies from the upper Mississippi river.

@article{Steingraeber1994PolychlorinatedBC,
  title={Polychlorinated biphenyl congeners in emergent mayflies from the upper Mississippi river.},
  author={Mark T. Steingraeber and Timothy Schwartz and James G. Wiener and Jon A Lebo},
  journal={Environmental science & technology},
  year={1994},
  volume={28 4},
  pages={707-14}
}
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 pglg of dry weight (1.2-29 pglg 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… CONTINUE READING