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Science 27 November 1964:
Vol. 146. no. 3648, pp. 1164 - 1166
DOI: 10.1126/science.146.3648.1164
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Articles

Mayfly Distribution Indicates Water Quality on the Upper Mississippi River

Calvin R. Fremling 1

1 Winona State College, Winona, Minnesota

Hordes of mayflies emerge during the summer months from most sections of the Upper Mississippi River, thus creating nuisance problems for shoreline residents and river traffic. The presence of these pollution-sensitive forms indicates, however, that the river is more river-like than sewer-like in a given area.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)