FORTY-FIRST BIENNIAL REPORT 105 



Johnson, William C. 



A Bottom Dredge for the Striped Bass Investigation. Submitted September 

 16, 1949. 7 pp., including 5 figures. 



Abstract : A bottom dredge was designed to survey shallow water areas where 

 the standard tow net could not be used for the striped bass investigation. A descrip- 

 tion of the net and its construction is given in detail ; dimensional drawings and 

 photographs are also included. 



Analysis of 1949 Striped Bass Party Boat Fishing Effort. Submitted June 

 14, 1950. 7 pp., including 1 table, 1 exhibit. 



Abstract : This is a routine report analyzing the fishing effort of the striped 

 bass party boat operators during 1949. The analysis is made up from the daily logs 

 the operators have submitted and other methods of contacting them for reports. 



Kersnar, Frank J. 



Chlorination of Crystal Lake. Submitted September 15, 1949. 21 pp., includ- 

 ing 8 figures. 



Abstract: Crystal Lake was chlorinated in an effort to eradicate all aquatic 

 life. Plan was to chlorinate so that residuals of 10 p. p.m. were obtained, but 

 mechanical difficulties encountered prevented reaching this standard. Residuals 

 slightly greater than 2.5 p. p.m. were obtained throughout the lake. Results achieved 

 were good, although higher residuals would have given better results. Description 

 given of apparatus and method used. 



Kimsey, J. B. 



Wildlife Conservation Board Project No. 49 FT(0), Tahoe National Forest 

 Flow Maintenance and Improvement Program. Report of Surveys in 1949. Sub- 

 mitted March 20, 1950. 46 pp., including 4 maps, 8 photos, 2 tables, and appendix. 



Abstract : Report of surveys made in 1949. Five units listed, two unsatis- 

 factory. Unit 1. Two check dams proposed. Dams on three other lakes tentatively 

 recommended pending work in 1950. Unit 2. Chemical treatment of lakes — not rec- 

 ommended. Unit 3. Barrier removal on south fork Yuba River, Nevada County. 

 Recommended removal three impassable falls in first two miles of stream. Unit 4. 

 Chemical treatment of lakes — not recommended. Unit 6. Retained dams recom- 

 mended on Lower and Middle Loch Leven Lakes. 



Chemical Treatment of Miller Lake, Placer County, August 21, 1949. Sub- 

 mitted March 27, 1950. 4 pp. plus map, 2 photos, blueprint. 



Abstract : A description of the lake, its fishery and past stocking is given. 

 The survey and subsequent chemical treatment is described. The treatment appears 

 to have been successful and thousands of suckers and only one large brown trout 

 were removed. A barrier dam was designed and constructed to prevent entry of 

 rough fish from outlet waters. The lake will be restocked in 1950 with 15,000 rain- 

 bow trout. 



Chemical Treatment of Richardson Lake, El Dorado County, August 20, 1949. 

 Submitted March 27, 1950. 4 pp. plus map, 2 photos, blueprint. 



Abstract : A description of the lake, its past stocking and fishery is given. 

 The chemical treatment was successful with thousands of introduced minnows and 

 suckers being killed and only one eastern brook and one rainbow trout killed. A bar- 

 rier dam to prevent rough fish migrations into the lake was designed and constructed. 

 The lake will be restocked in 1950 with 8,000 eastern brook trout. 



Notes on Kokanee (Oncorhynchus nerka kennerlyi) spawning in Donner 

 Lake, Nevada County, 1949. Submitted June 30, 1950. 18 pp., including 6 figures. 



Abstract : Spawning Kokanee and their nests were observed periodically 

 from November, 1949, to February, 1950. Drawdown of lake by power and irriga- 

 tion companies exposed nests. Most of eggs were killed by prolonged freezing. Some 

 eggs which were frozen for only short periods continued development as did eggs in 

 seepage areas. It appears successful natural reproduction of Kokanee in Donner 

 Lake is possible, providing water levels can be manipulated reasonably. Discussion 

 of possible remedies, including moving gravels into deeper water. 



Miller, Richard G. 



A Study of the Food of Lake Tahoe Fishes. Progress Report: 1948. Sub- 

 mitted April 29, 1949. 27 pp., including 11 tables and 2 figures. 



Abstract: Summarizes findings of first half of proposed two-year program 

 investigating ecology of Lake Tahoe fishes. Lists 10 species present, with lake chub 

 and sculpin as principally utilized forage fishes, whitefish and sucker as incidental 



