PART I. INTRODUCTION: 

 REVIEW OF THE PROBLEM AND SCOPE OF THE STUDY 



By G. Ivor Jones* and Maurice E. Stansby** 



The Hatchery-Feed Problem 



A complete program for the maintenance and rehabilitation of the 

 fisheries of the Columbia River and its tributaries has been developed 

 because of the depletion of the salmon runs in this great river system. 

 Surveys (Barnaby 1945; Bryant 1949; and State of Washington 1949), have 

 indicated numerous causes for the decline of the salmon runs and have 

 recommended corrective programs for stream improvement and for increased 

 hatchery propagation of salmon. At the present time sin extensive state 

 and federal collaborative program of hatchery construction in the lower 

 Columbia River region is being undertaken. During the 10-year period of 

 the plan, now under way, many existing hatcheries are being enlarged and 

 about 24 new fish cultural stations will be constructed in Washington and 

 Oregon. As the new hatcheries go into operation, the demand for nutri- 

 tionally adequate feed for young salmon will increase accordingly. It 

 has been estimated that the new stations will require as much as 3«5 

 million pounds of fish-feed per year. This expected new demand along with 

 existing hatchery feed requirements will necessitate finding new feeds in 

 adequate supply since present sources of supply of feeding materials are 

 being utilized to near their maximum limit. 



Scope of the Study 



Early in 1947 the Seattle Fishery Technologica± Laboratory was enabled, 

 by means of a grant from t-he Office 

 of Technical Services, Department 

 of Commerce, to carry out research 

 investigations on the utilization 

 of Alaskan saunon cannery waste. 

 As a part of this project a cooper- 

 ative study with the Leavenworth, 

 Wasnington, salmon hatchery 

 (figure I-l) was initiaoed to 

 determine the value of salmon can- 

 nery waste as fish hatchery feed. 

 Salmon viscera had previously been 

 used in some natcneries to replace 

 a portion of the beef liver and 

 other animal products used in the Figure I-l. Fish and Wildlife Service 

 feeding of salmon fingerlings. Be- hatchery at Leavenworth, Washington 

 cause the use of viscera in the diet where feeding tests were conducted, 

 had shown promise, it was believed 



worthwhile to attempt a critical evaluation of salmon waste in the diet of 

 young salmon. 



•»• cnemist formerly with the Fish and Wildlife Service, Fishery Technological 



Laboratory, Seattle, Washington. 

 ** Chief, Pacific Coast and Alaska Technological Research, Fish and Wildlife 



Service, Fishery Technological Laboratory, Seattle, Washington. 



