FORTY-SECOND BIENNIAL. REPORT 181 



Dill, William A. 



A preliminary report on the status of the golden trout fishery of California. Sub- 

 mitted September 25, 1950. iii plus 28 p., including 2 figures. 



Abstract : Prepared for use as Appendix I in the California Fish and Game's 

 "A report on the golden trout fishery of California" submitted to California Fish and 

 Game Commission December 1, 1950. The most inclusive report yet prepared on 

 golden trout (Salmo agua-tonita) . Covers systematic status, desirability of the spe- 

 cies, natural range and its extension, hatchery program, abundance, factors affecting 

 depletion, protective measures, recommendations. The bibliography contains the 

 major references on the species. 



The Dingell-Johnson program in California. Submitted June 16, 1952. 8 p. 



Abstract : Describes five current projects together with their background. F-l-R, 

 a study of the yellowtail fishery. F-2-R, a study of the catfish fishery of California. 

 F-3-R, experimental backcountry fish management. F-4-D, north-coastal stream 

 restoration. F-5-R, surf fishing investigation. Other prospective projects include a 

 study of the effect of diversions on salmon and steelhead, and integrated studies of 

 both trout and warm-water fisheries. 

 Dill, William A. ; Elden H. Vestal ; and J. C. Fraser. 



A partial list of waters in California known or reported to contain golden trout. 

 Submitted September 25, 1950. 6 p. 



Abstract : Prepared for use as Appendix IT in the California Division of Fish 

 and Game's "A report on the golden trout fishery of California," submitted to the 

 California Fish and Game Commission on December 1, 1950. The most complete 

 list of this nature yet prepared. Records present distribution in California outside 

 the National Parks (Yosemite. Sequoia, and Kings Canyon) insofar as can be de- 

 termined from the easily available records. 

 Douglas, Philip A. 



Lake Wohlford, San Diego County — catch record analysis 1947-48-49. Submitted 

 April 24, 1951. 11 p., including 3 tables. 



Abstract : During the three-year period 1947-1948-1949 an average of about 

 15.8 percent of all the registered fishermen at Lake Wohlford were checked and 

 daily catch records maintained. The lake was opened to fishing between April and 

 September of each year. 



The average angling success was about 3.3 fish per angler per trip (a trip com- 

 prised 3.76 hours of fishing). This is approximately 45 percent better than the re- 

 turns on Norris Reservoir in 1940, and 23 percent poorer than the San Diego City 

 Reservoirs indicated for the 20-year period, 1929-1948. 



The yield, measured in pounds per surface acre, was estimated to average about 

 200, which is more than twice the expectancy of production on lakes in the rest of 

 the country. It is also on a par with the 200 pounds-per-acre-yield found in un- 

 fertilized waters in Alabama. 



Catch composition varied somewhat during the three years of these records, but 

 the average as shown in Table III would indicate that the catfish were doing better 

 than the other game fish species in this water. Bluegill show a good average return, 

 with crappie and bass giving the poorest results. 



Farm pond investigation — Southern District No. 8, report No. 2, June 1949. 

 Submitted August 20, 1951. 11 p., plus 1 figure and 2 tables. 



Abstract: Covers data, discussion and analysis of a farm pond recheck in the 

 Antelope Valley area, Los Angeles County. Five ponds were seined and partial 

 chemical analyses made. It was found that heavy water fluctuations during the 

 spring, a low poundage ratio (1:2) of predator to forage fish, a high average pH, 

 and low fish removal by angling, provided poor fish production. 



Recommendations : 



1. That small, less than i acre, fluctuating irrigation reservoirs not be stocked 

 with bluegill-largemouth black bass combinations. 



2. That a straight stocking of black bass be carried out on an experimental 

 basis. 



3. That a "use-education" program be inaugurated to utilize this fishery, and 

 maintain sufficient water levels to provide suitable spawning conditions and 

 normal habitat. 



