'\*r- ^ v - 



CONTENTS. 



Page 



Chapter I. Outline op Study 1-10 



Lake Winnebago and Green Lake 1 



Methods of making collections 8 



Chapter II. Annual Distribution op the Organisms op the 



Plankton . , 11-46 



Distribution of C. brevisi^inosus and C. pulehellus in Wiscon- 

 sin lakes 27 



The "bloom" 36 



Annual distribution of the total plankton 38 



Constituents which produce plankton maxima 39 



Comparison of amount of plankton in different years 41 



Comparison of plankton in Green lake and Lake Winnebago. . 42 



Comparison with the plankton of other lakes 43 



Chapter III. Discussion of Results 47-59 



Value of plankton collections 47 



Relative importance of plankton constituents in producing 



maxima 49 



Comparison of plankton and temperature curves 49 



Comparison of curves of total plankton with curves of plankton 



contituents 51 



Horizontal distribution 51 



Comparison of plankton collections over muddy and stony bot- 

 toms 59 



Chapter IV. Distribution op Species 60-69 



Geographical distribution 60 



Comparison of the faunae and florae of different classes of 



lakes 62 



Comparison of plankton of successive years 65 



Relative value of deep and shallow lakes for the production of 



fish 67 



List of Papers Quoted 70-71 



