186 DEPARTMENT OF FISH AND GAME 



Wales, J. H. 



Management of king salmon spawning in the Klamath River, Siskiyou County. 

 Submitted November 10, 1950. 10 p., including 4 figures and 3 tables. 



Abstract : Discussion of the number and location of spawning king salmon in the 

 upper Klamath River below Copco dam in 1950. Plans are submitted for future 

 management of these spawners. List of king salmon spawning tributaries of Klamath 

 is submitted, with possible spawning runs. 



Klamath River fish count, Klamathon racks, Siskiyou County. Submitted Decem- 

 ber 14, 1950. 8 p., including 3 tables. 



Abstract : Tables show the daily counts of fish going through the Klamathon 

 racks between August 27 and October 27, 1950. The dead fish drifting onto the racks 

 were sexed and presence of eggs recorded. Comments are made on these counts of 

 king and silver salmon and steelhead. The total king salmon count was 21,584, the 

 second highest in 17 years. 



Recommendations for management of the Trinity River, Trinity County, Part 2. 

 Recommended action. Submitted January 16, 1951. 8 p., including 2 tables. 



Abstract : Presents recommendations for course of action in connection with pro- 

 posed water use projects of U. S. Bureau of Reclamation. 



The decline of the Shasta River king salmon run. Submitted April 10, 1951. 82 p., 

 including 17 figures and 13 tables. 



Abstract : The several phases of the life cycle of the king salmon run in the 

 Shasta River has been considered with respect to the factors which may have con- 

 tributed to the decline of the run. It is presumed by the writer that the commercial 

 and sport fishing has been the most important factor. The Copco power dams with 

 their attendant river flow fluctuation, the irrigation use of the Shasta River water, 

 and possible predation by lampreys are also considered to be major causes of the 

 decline. 



Creel census, Shasta River, Siskiyou County. Submitted April 28, 1951. 2 p. 



Abstract : On the opening day, in the lower seven miles of the river 223 anglers 

 count 0.65 fish per hour or 2.6 fish per day for a total of 580 steelhead, 10 percent 

 one-year ; 80 percent two-year ; 10 percent three-year olds. 



Sacramento River experimental stream for 1950. Submitted May 30, 1951. 21 p., 

 including 11 tables, plus 3 figures. 



Abstract : From returns to date it appears that the anglers will catch from 5-8 

 percent of the hatchery planted fingerlings in the South and Middle Forks. How- 

 ever, these fish average less than 6 inches in length. There has been an 84 percent 

 return of a plant of yearling rainbow trout. The trout population was determined 

 by planting marked rainbow trout fingerlings one day and shocking representative 

 sections the following day. In the Middle Fork it is estimated that per mile there 

 were on August 20 the following : Wild rainbow trout — 1,658 fingerlings, 858 year- 

 lings, 74 two-year olds, 16 three-year olds. Hatchery rainbow trout — 1,056 finger- 

 lings, 74 yearlings. Total rainbow trout per mile — 3,736. 



Efficiency of king salmon spawning in Fall Creek, Siskiyou County. Submitted 

 September 28, 1951. 54 p., including 13 figures and 10 tables. 



Abstract : 750 male and 750 female king salmon were allowed to spawn in Fall 

 Creek in 1950. From computations of the total eggs contained and from the com- 

 puted number of fingerlings migrating downstream into the Klamath River it was 

 found that the spawning efficiency was 6.8 percent. 



1951 Klamath River fish count — Klamathon racks, Siskiyou County. Submitted 

 January 2, 1952. 9 p., including 3 tables. 



Abstract : The total number of king salmon counted through the Klamathon 

 racks from August 10-October 29, 1951, was 17,857. Of this total 61 percent were 

 females and 39 percent males. Of the latter 4 percent were grilse. This is the third 

 largest run of kings recorded at this station since 1925. Of 213 dead king salmon 

 females removed from the racks 49 percent had not spawned. Up to the time of the 

 removal of the racks 331 silver salmon and 1,002 steelhead had also been counted. 



