102 FISH AND GAME COMMISSION 



TITLES AND ABSTRACTS OF ADMINISTRATIVE REPORTS 



SUBMITTED BY THE BIOLOGICAL STAFF 



July 1, 1948, to June 30, 1950 

 Beck, Ralph V. 



Creel Returns From Crowley Lake, Mono County, California, Season of 1949. 

 Submitted November 18, 1949. 10 pp., including 7 figures and 4 tables. 



Abstract : A creel count was made at Crowley Lake by members of the fish- 

 eries staff during five four-day periods in the 92-day fishing season. During the 20 

 days of census 3,930 anglers fished 21,313 hours and caught 2,925 fish, including 2,349 

 rainbow (80.3 percent), 219 brown trout (7.5 percent), and 357 Tahoe cutthroat 

 trout (12.2 percent). The average catch was 0.74 and the average catch per angler 

 per hour was 0.14. In 1947 the average catch and average catch per angler per hour 

 was 1.2 and 0.19 respectively, and in 1946 they were 2.0 and 0.33, indicating a 

 gradual decline in the fishery. The percentage of brown trout and Tahoe cutthroat 

 trout caught was greater in 1949 than in the two previous years. It is estimated that 

 52,249 people fished Crowley Lake during the entire 92-day season and caught a 

 total of 38,887 trout of all species. 



Calhoun, Alexander J. 



1946 Angling Catch Records. Submitted July 28, 1948. 80 pp., 26 tables, 10 

 figures. 



Abstract : Angling catch questionnaires were .sent to a random sample of 

 3.9 percent of the 766,75.3 licensed anglers in California in 1946. Total catch trends 

 in recent years appear to have been relatively stable for trout, salmon and catfish. 

 They appear to have decreased slightly for striped bass, and to have increased for 

 black bass, sunfish and crappie. Numbers of anglers have increased sharply for all 

 species, and there has been a corresponding decrease in the mean annual catch of 

 all species, least extreme in the case of spiny rays. The validity of estimates derived 

 from postal card survey, the county of residence distribution of licensed anglers, and 

 migrations of trout and striped bass anglers from county of residence to county 

 of catch are discussed in the report. 



Calhoun, Alexander J., and G. M. Christman 



Migration of California Trout Anglers in 1948. Submitted September, 1949. 

 5 pp., 10 figures and 2 appendixes. 



Abstract : The 1948 migrations of licensed California trout anglers from six 

 residence areas to eight trout fishing regions within the State are outlined in a series 

 of tables and diagrams. Estimates of the numbers of trout caught by anglers making 

 the various migrations are included. 



Calhoun, Alexander J., and Charles E. Warren 



The Effect of Increased Towing Speed Upon Tow-net Catches of Small Striped 

 Bass. Submitted August 2, 1949. 8 pp. 



Abstract : The tow-net used in studies of striped bass fry is described. Results 

 of a series of test toAvs at different speeds indicated decreasing efficiency of the net 

 at speeds over 2.7 feet per second. No significant difference in length frequencies was 

 apparent at the different speeds used, ranging from 2.7 to 6.6 feet per second. 



Coots, Millard 



Fish Rescue 1949. Stream Improvement Headquartei-s, Treka. Submitted 

 April 3, 1950. 2 pp. including one table. 



Abstract : During the summer of 1949, 56,688 young salmonids, consisting of 

 21,832 silver salmon and 34,856 steelhead, were rescued from drying streams and 

 irrigation ditches tributary to the Scott and Klamath Rivers. This work was done 

 by a biological aid with assistance from the Stream Improvement Headquarters staff. 



Creel Census — April 29, 1950. Klamath River, Siskiyou County. Submitted 

 May 16, 1950. 3 pp. 



Abstract : Angling activity on the Klamath River was checked on this date. 

 222 anglers were counted between Copco and the Scott River, a river distance 

 of about 53 miles. 87 anglers were interviewed, including 42 who had completed 

 their angling effort. The average fishing time was 3.5 hours, the average catch 9.4 

 fish, catch per angler hour 2.7, estimated total catch 2,082. The catch consisted 

 mostly of immature steelhead, plus a few spent adult steelhead, immature salmon, 

 and yellow perch. 261 trout were measured, ranging from 4.0 inches to 13.9 inches 

 (fork length). The mean length was 6.58 inches. 



