WASHINGTON (Cont. ) 

 University of Washington 



1. Nutrition of Salmonoid Fishes. 



Objectives of the project include studies of the basic diet requirements of 

 salmon and trout to aid in developing better hatchery diets; an evaluation of 

 processing techniques for fish food products - drying, freezing, canning, etc. ; 

 and feeding experiments to develop efficient, cheap diets for hatchery use. 



Hdqrs. Fisheries Center; began 1930, indefinite; $3,000; Lauren R. Donaldson, 

 Leader; reports available. 



Address inquiries to: Lauren R. Donaldson, 110 Fisheries Center, University 

 of Washington, Seattle 5, Wash. 



2. Study on the Response of Salmon to Physical Changes That May Influence Migra- 

 tion. 



Salmon returning to the ponds at the Fisheries Center are "checked in" at 

 their time of arrival. Records are maintained of the water temperature, air 

 temperature, rainfall, illumination, barometric pressure, etc. , and the cor- 

 relation between the time of arrival and the physical conditions determined. 



Hdqrs. Fisheries Center; began October 1953, to close January 1954; 

 $2,000; Lauren R. Donaldson, Leader; reports available. 



Address inquiries to: Lauren R. Donaldson, as in No. 1 above. 



3. Selective Breeding of Rainbow and Cutthroat Brood Stock. 



This project is a continuing one in which rainbow and cutthroat brood stocks 

 capable of producing the best possible young fish for stocking lakes and streams 

 in this region are being developed. 



Selection is based on individually paired matings of the choice combinations. 

 Maximum egg production, highest percent hatch, fastest rate of growth, best 

 food utilization, resistance to disease, age at maturity, season of spawning, 

 etc. are evaluated in making final selections. 



Hdqrs. Fisheries Center; began March 1932, indefinite; $3,000; Lauren R. 

 Donaldson, Leader; reports available. 



Address inquiries to: Lauren R. Donaldson, as in No. 1 above, 



4. Interracial Hybridization of Cutthroat Trout. 



The practice and techniques of interracial hybridization used for many farnn 

 crops and in breeding farm animals are applied to cutthroat trout. 



Two racially distinct stocks of cutthroat trout, one the select strain developed 

 at the University of Washington, and the second a wild strain from Lake Whatcom, 

 Washington, are cross-fertilized. The survival, rate of growth, and stocking 

 qualities of the interracial hybrids are compared with the two original stocks. 



Hdqrs. Fisheries Center; began January 1953, indefinite; $1,800; Lauren R. 

 Donaldson, Leader; reports available. 



Address inquiries to: Lauren R. Donaldson, as in No. 1 above. 



5. Release of Marked Silver Salmon, of Transplanted Stock, at Two Locations in a 

 Watershed. 



This project is an attempt to evaluate the homing tendencies and survival rate 

 of silver salmon fingerlings released at two locations in the same watershed. 



Silver salmon fingerlings reared at the Soos Creek Hatchery of the State 

 Department of Fisheries were transferred to the Issaquah Hatchery and to the 

 Fisheries Center. After a period of retention of six weeks the fish were marked 

 for identification and released from the two places on the same day. Most of 

 the adults have returned and the data are being evaluated. 



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