PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1923. 



21 



Pounds and cost per pound of fish food used during the fiscal year 1923 — Con. 

 ROCKY MOUNTAIN TROUT STATIONS— Continued. 



NEW ENGLAND TROUT AND SALMON STATIONS. 



STATIONS PROPAGATING BOTH TROUTS AND POND FISHES. 



POND FISH-CULTURAL STATIONS. 



HATCHERY FISH-CULTURAL NOTES. 



METHOD OF PREPARING FOOD FOR YOUNG SALMON. 



In connection with the sahnon-rearing operations at the Oregon 

 station and substations, considerable quantities of immature sahnon 

 eggs are used as a fish food with very satisfactory results. This 

 spawn is taken in immense quantities in the commercial fisheries 

 of the Columbia River and is held in cold storage until needed, 

 when it is thawed by immersion in cold water. In preparing the 

 material for food it is first passed through the coarse plate of a 

 meat chopper and is then cooked in a single boiler for about 2^ 



