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INHS Bulletin vol. 15:5PDF


Title:Changes in the Small Bottom Fauna of Peoria Lake, 1920 to 1922
Author(s):Richardson, R.E.
Subject(s):Illinois River
Peoria Lake
Dredging -- Environmental aspects -- Illinois
Abstract:Early in July 1922 the cooperative program of chemical and biological investigations of the middle Illinois River and Peoria Lake begun in the summer of 1920 by the State Natural History Survey and the State Water Survey was again taken up after an interval of two years. The summer's work included, as one item among several others, between the date of opening and the middle of September, quantitative bottom dredgings at seventy-one stations in the channel and wide waters of Peoria Lake and contiguous river between Chillicothe and the Peoria and Pekin Union Railway Bridge opposite the lower part of the city of Peoria. The dredging stations were distributed over approximately the area covered by the thirty-five stations worked in Peoria Lake in the summer of 1920, and covered a linear distance of 19.9 miles. Collections were made and handled as in 1920. Assistance was furnished by Dr. C. P. Alexander in determining the larval Chironomidae (midges), by Mr. F. C. Baker and by Dr. V. Sterki on snails of the family Sphaeriidae, and by Prof. Frank Smith and Dr. J. P. Moore on the worms and leeches. The nitrogen data on which the 1921 curve of per cent free ammonia is based have been furnished in advance of publication by the U.S. Public Health Service.
Issue Date:1925-08
Publisher:Champaign : Illinois Natural History Survey
Series/Report:Illinois Natural History Survey Bulletin; v. 015, no. 05
Publication Status:published or submitted for publication
Peer Reviewed:is peer reviewed
Rights Information:This work is in the public domain.
Date Available in IDEALS:2013-11-03

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