16 



UNIVERSITY OF WISCONSIN STUDIES 



eight species were caught in the nets as compared to thirteen 

 caught in Lake Pepin. 



The writer made three trips on Lake Michigan with the 

 boats "Albert C. Kalmbach" and "Four Brothers." The gill 

 nets used by the crews were about eight feet deep and the 

 meshes were 2J inch or 1 5/16 inch, "bar mesh." On July 

 22, 1600 feet of 2} inch mesh net was hauled from 15 to 30 

 fathoms, where it had been set for four days. On July 26, 

 1600 feet of 1 5/16 inch mesh net was hauled from 65 to 80 

 fathoms off Bayley's Harbor where it had been set seven days. 

 On July 27, 3200 feet of 2J inch mesh net was lifted from 15 to 

 35 fathoms where it had been for four days. The catches on 

 these days have been figured to the same catch-per-hour basis 

 as that for a gill net seventy-five feet long in order that they may 

 be compared with the catches of the writer's nets in shallower 

 water. They are summarized in Table IV. 



It will be noted that the catch per hour for the bloater caught 

 by the writer (Leucichthys harengus) was somewhat less (Table 

 III) than that (L. hoyi) of the deep water fisherman (Table IV). 

 The other species caught in deep water were not taken in any of 

 the writer's nets down to 28.5 meters. The long-nosed sucker, 

 whitefish, and longjaw were caught in 2% inch mesh nets at 

 depths of from 27 to 64 meters, but were not taken in 1 5/16 

 mesh nets set from 119 to 146 meters. The opposite is true of 

 the blackfin and cottid. The cottid was probably not taken at 

 depths of 27 to 64 meters because the mesh of the nets set was 

 too large, as it was found in the stomachs of other fishes. The 



TABLE IV 



LAKE MICHIGAN. CATCH PER HOUR IN GILL NETS SET IN DEEP WATER BY 

 COMMERCIAL FISHERMEN, ON THE BASIS OF A NET 75 FEET LONG 



