Figure 3.- -Hand winch used to roll fyke traps out of river. 



on the trap when it was returned to its fishing 

 position. A push was usually all that was re- 

 quired to start the fyke trap rolling down the 

 river bank to its fishing position. Where the 

 slope was gentle it was necessary to pull the 

 trap into position with a skiff and outboard 

 motor. Traps were always fished in water 

 deep enough to cover the entrance tunnels. 



To insure that they would fish in a com- 

 parable manner at all times, traps were 

 brushed daily and thoroughly cleaned weekly 

 with the aid of a high-pressure jet of water. 

 Debris tended to accumulate and restrict the 

 waterflow through the trap. During high water 

 a constant watch had to be maintained to pre- 

 vent major damage to the traps from large 

 logs floating downstream. When water veloci- 

 ties exceeded 6 feet per second, mortalities 

 of fish increased markedly. 



Method of Sampling Fish 



With a dip net fish were removed through one 

 of three access doors and placed in a cradle 

 where they were measured and tagged. The 

 number of each species of fish was recorded at 

 each lift. The method of sampling the trap catch 

 for age and size composition varied from year 

 to year. In 1957 all red salmon were measured, 

 and a scale sample was taken from each, except 

 during the peak of the run when only every 10th 

 fish was sampled. In 1958 and 1959 scale 

 samples and length measurements were taken 

 weekly from 100 fishof each sex. Each fish was 

 measured from mideye to fork of tail, the 

 measurement being read to the nearest 5 mm. A 

 scale was removed with a forceps from the fish 

 in an area about three rows above the lateral 

 line and on a vertical line from the origin of 

 the dorsal fin. 



