representative s/, and that rainbow and' cuttlTToat ti'out taken in Gibson 

 Reservoir and tne strea.m. above were about tv/ice as large as those taken 

 below Gibson Reservoir. 



The average rate of catch for the IJorth Fork Sun River fishery as 

 a whole was 0,43 fish per hour (table 2). The average rate for the two 

 reservoirs was 0«34 fish per hour, considerabljr less than the 0«52 fish 

 per hour for the stream. Both the highest and lowest rates of catch were 

 recorded on sections of the stream (0,78 fish per hour on one portion of 

 the Lower River and 0,16 fish per hour at the jixnction of the two forks 

 of the ITorth Fork Sun River). The 0,34 fish per hour for the two reser- 

 voirs was more or less intermediate betr/een the tv/o extremes for the 

 stream. 



The average rate of catch in terms of pounds of fish per hour varied 

 from 0,13 pound per hour (Liiddle River) to 0.34 pound per hour (Lovrer 

 River C); that for the area as a whole vras 0.19 pound per hour. The 

 average for the two reservoirs (0,19) and that for the strea.m (0,20) vrere 

 essentially the same. Variations in rate of catch for the several check 

 areas are shoiivn in table 2, 



Estimated fishermen use and yield in 1951 6/ of the associated fish- 

 eries, exclusive of that of Wood Lake 7/, T/as about 2,976 fishermen-days 

 (13,629 fisherman-hours) and 1,546 fish weighing 2,155 pounds (tables 5 

 and 6). This represents only about 29 percent of the use, about 9 percent 

 of the yield in mimbers, and about 24 percent of the yield in pounds of 

 fish of that of the entire study area, in spite of the fact that there are 

 about 1,000 8/ more acres of waters in the associated fisheries than in the 



5/ Larger samples could not be secured because fishermen generally 

 cleaned their fish before leaving fishing viraters, but a sufficient number 

 of cleaned fish were examined to justify the conclusion reached. Data ob- 

 tained on 30 fish taken from the upper section in 1951, but not recorded 

 during the course of the census, tends to substantiate the stated contention. 

 The 12 rainbow, 3 cutthroat, 6 hybrid, ^and 10 brook trout in this sample 

 averaged 1,52, 0,95, 1.43, and 0,33 pounds, respectively, 



6/ See footnote 3, page 11, 



7/ Wood Lake is unaffected by water development on the Ilorth Fork Sun 

 River and will be discussed separately, 



8/ Acreage in Pishkun Reservoir (1,550 acres). Willow Creek Reservoir 

 (1,40'U' acres). Tunnel Lake (30 acres), and Split Rock Lakes (about 100 

 acres), excluding that in Pishkun Canal, equals about 3,100 acres, whereas 

 Gibson Reservoir (1,360 acres). Diversion Reservoir (100 acres), and an 

 estimated 700 acres in the river equals about 2,100 acres. 



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