SPECIES COMPOSITION OF THE 

 TRAWL CATCH 



Species composition and catch rate varied 

 with fishing depth primarily because of the 

 increasing abundance of chubs at depths greater 

 than 30 fathoms. Of the 157 hours of total 

 fishing time, 86 hours (55 percent) were spent 

 in 30 fathoms or less. These drags, however, 

 produced only 25 percent of the total catch 

 (fig. 5). 



Figure 6 shows the total species composition 

 as well as the species composition for drags 

 at two depth ranges --up to 30 fathoms and 35 to 

 70 fathoms. Shallow water drags caught a 

 variety of species with one-third of the catch 

 composed of smelt; whereas, chubs accounted 

 for 25 percent; suckers, 22 percent; and lake 

 trout, 8 percent. In deeper water, the catch was 

 nearly homogeneous, with 90 percent chubs and 

 only 2-1/2 percent smelt, 2 percent suckers, 

 and 1-1/2 percent lake trout. The total species 



TOTAL-ALL DEPTHS 

 (55.977 lb.) 



0-32 FATH. 

 (13.890 lb.) 



33-75 FATH. 

 (42.087 lb) 



CHUBS 



SPECIES LEGEND 



SUCKERS 



LAKE HERRING 





SMELT 



ALE WIFE 



OTHERS 



LAKE TROUT 



WHITEFISH 



Figure 6. — Species composition of catch taken by Kaho trawl drags in Lake Superior. Top circle 

 is total catch for all drags. Lower circles represent species composition of catch taken in the 

 0- to 30-fathom and 35- to 75-fathom depths. 



