OREGON (Cont. ) 



2. Stream Pollution in the South Saniam River, Oregon, as Measured by Biological 

 Indicators. 



Fishes and aquatic insects were sampled at monthly intervals at two sta- 

 tions on the South Santiam River, one above Lebanon and the other below the 

 City. Objectives were to ascertain the seasonal biological changes in a polluted 

 river zone extending over a 12 -month period and to ascertain the degrees of 

 biological recovery resulting from abatement measures. 



State Sanitary Authority, U. S. Public Health Service, Division of Water 

 Pollution Control cooperating; hdqrs. Corvallis; began September 1952, to close 

 October 31, 1953; $1,000; R. E. Dimick and Charles Ziebell, Leaders; reports 

 available. 



Address inquiries to: R. E. Dinnick, as in No. 1 above. 



3. The Pathology of Fishes Subjected to Kraft Mill Effluents. 



The objectives have been to ascertain if Kraft Mill effluents and constituent 

 parts of the effluent cause characteristic tissue damage to fishes. So far all 

 tests have been negative, and the investigation is now directed to studying effects, 

 if any, on blood of fishes. 



National Council for Streann Innprovement cooperating; hdqrs. Corvallis; 

 began June 1, 1952, to close June 30, 1954; $1,800; Charles Warren and Robert 

 McHugh, Leaders. 



Address inquiries to: Charles Warren, Department of Fish and Game Man- 

 agement, Oregon State College, Corvallis, Oreg. 



4. The Dissolved Oxygen Requirements of Juvenile Salmon. 



Objectives are to ascertain the effects of low D. O. on juvenile salmon at 

 particxilar temperature levels. The various tests are being conducted in running 

 water aquaria in which the D. O. levels and temperatures are held constant. 

 Young silver and chinook salmon have been employed as test animals. Most of 

 the tests were conducted for 5 -day periods and recent trials have been made for 

 over 20 days duration. 



National Council for Stream Improvement cooperating; hdqrs. State College 

 Fisheries Laboratory, Yaquina; began June 1952, to close June 1954; $2,000; 

 Charles Warren and Robert Davison, Leaders; reports available. 



Address inquiries to: Charles Warren, as in No. 3 above. 



5. The Avoidance Reactions of Juvenile Salmon to the Effluents of Pulp Mill Wastes. 



The project objectives are to ascertain if juvenile salmon avoid the effluents 

 of Kraft Mill and of sulphite mill wastes. If so, at what concentrations or dilu- 

 tions does avoidance occur. Studies with Kraft Mill effluents have been concluded 

 and investigations with sulphite mill wastes have just begun. 



National Council for Stream Improvement cooperating; hdqrs. Corvallis; 

 began June 1952, to close June 30, 1955; $1,200; Charles Warren and Ben Jones, 

 Leaders; reports available. 



Address inquiries to: Charles Warren, as in No. 3 above. 



6. A Study of Delayed Mortality in Liberated Hatchery Reared Trout. 



The objective of the project is to reduce the cost of fish for stocking by elim- 

 inating delayed mortality losses. Project consists of detailed physical and chemi- 

 cal analysis of the entire problem. Tests of equipment with a study of trout re- 

 sponses carried out on both an experimental and practical stream liberation 

 program. This includes testing of tank trucks of various types and with various 

 facilities for water aeration and agitation. 



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