The frame consisted of five hoops of 3/4-inch 

 galvanized pipe, each having a larger external 

 hoop welded to it for a rolling surface (fig. 2). 

 Six 2- by 1- by 1/8-inch channel iron stringers 

 were welded to the hoops. This framework 

 was covered with nonclimable fencing made 

 of 2-inch square 14-gauge mesh wire. The 

 trap was divided into two compartments by a 

 funnel located at the midpoint of the trap. 

 This funnel had a 26-inch opening. Another 

 funnel with a 45-inch opening was located at 

 the entrance to the trap. The last compart- 

 ment had three equally spaced access doors 

 so that the trap could be emptied regardless 

 of its position on a streambank. The traps 

 weighed approximately 750 pounds and were 

 painted with a dark green, rust preventive, 

 dull-finish paint. A bridle of I/4-inch gal- 

 vanized wire cable with a swivel attachment 



was located on the bow end of the trap. From 

 this a 1/4-inch wire cable was stretched to 

 shore and made fast to a tree or other good 

 anchor to hold the trap in place against the 

 current and debris. 



Method of Fishing Fyke Traps 



The traps were emptied twice daily in 1957 

 and 1958 and daily in 1959. Frequent checks 

 were made each day during the height of the 

 migration to guard against possible over- 

 crowding of fish. 



Traps were rolled out of the water by 

 means of a 1/4-inch wire cable and a hand 

 winch (fig. 3). The cable, which was wrapped 

 around the trap about three turns, wound off 

 the trap as it was brought in and wound back 



Figure 2.— Metal fyke trap used in test-fishing experiments in the Kenai River. 



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