QUANTITATIVE STUDIES OF THE BOTTOM FAUNA IN 
THE DEEPER WATERS OF LAKE MENDOTA 1 
Chancey Juday 
Notes from the Biological Laboratory of the Wisconsin Geological and 
Natural History Survey. ( XV. 
Introduction 
A general investigation relating to the biological productivity of 
Lake Mendota was begun in the year 1911, and various phases of 
this problem have received attention during the intervening period 
of time. The first phase of the work involved a study of the plank¬ 
ton of the lake, both from a quantitative and from a chemical stand¬ 
point. This part of the investigation was continued from 1911 to 
1917, and a bulletin which deals with the results obtained in this 
study is now ready for publication. 
In the autumn of 1913, Muttkowski (4) began a statistical study 
of the bottom fauna in the shallower water of Lake Mendota. Par¬ 
ticular attention was given to the region between the shore line 
and the seven-meter contour line, comprising an area of about 12 
square kilometers or slightly more than 30 per cent, of the total 
area of the lake. His investigation was continued until Septem¬ 
ber 1, 1916, thus covering a period of approximately three years, 
and the results were embodied in a report which was published in 
1918. 
In addition to this quantitative study of the bottom fauna of the 
shallower water, attention may be called to the fact here that one 
of the papers in the present series of notes (no. XVII) deals with 
the results obtained in a quantitative investigation of the larger 
1 Part of this investigation was done in cooperation with the U. S. Bureau 
of Fisheries, and the results are published with the permission of the Commis¬ 
sioner of Fisheries. 
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