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Description

Article written by Cal R. Fremling regarding mayflies on the upper Mississippi River, population and distribution data over a 7-year period, and pollution levels of various river sections indicated by presence (or lack) of mayfly mass emergences. Fremling is credited as: "Winona State College, Winona, Minnesota." Abstract: "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." Article copied from Science, 27 November 1964, pages 1164-1166. 3 pages. Part of the Cal R. Fremling Collection.

Publication Date

1964

Publisher

Library

City

Winona, Minnesota

Keywords

Biologists; Insects Behavior; Mayflies; Upper Mississippi River; Pollution

Department

Special Collections-Library

Notes

1964-11-27

Rights Management

Requests to reproduce this image must be granted by the Winona County Historical Society.

Contributing Institution

Winona County History Center

Master File Format

TIFF

Scanning Responsibility

Northern Micrographics

Date Digital

2019-06-24 00:00

Metadata Creation Responsibility

Anna Gaffey

Unique Identifier

2011.003.0116

Mayfly distribution indicates water quality on the Upper Mississippi River

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