24 



UNIVERSITY OF WISCONSIN STUDIES 



were not caught during the present investigations indicates they 

 are not abundant enough to be an important element in the fish 

 fauna of a lake. For example, the writer has caught dog-fish in 

 Lake Mendota, both in gill nets and in seines, but such catches 

 are uncommon enough to make him feel that it is proper to ac- 

 cept the catches here considered as furnishing a fair representa- 

 tion of the fish life of the lake and its distribution during the 

 summer season. As the various species of ciscoes have much the 

 same habits everywhere, and are therefore ecologically similar, 



TABLE VIII 



COMPARISON OF TOTAL AVERAGE CATCH PER HOUR IN GILL NETS IN Six 

 WISCONSIN LAKES 



These averages are not directly comparable to others in this table as they came wholly or 

 in part from Table IV. 



t In Lake Wingra no 2-inch or 3-inch mesh nets were set (Pearse and Achtenberg, 1920). 

 In the other lakes a "battery" including %, 1 , 1 H, 2, and 3-inch mesh nets was set. 



