88 Salmonidae 



spawning grounds. In years of high water doubtless many 

 salmon run in the spring which might otherwise have waited 

 until fall. 



The key to the situation lies in the artificial propagation of 

 salmon by means of well-ordered hatcheries. By this means the 

 fisheries of the Sacramento have been fully restored, those of the 

 Columbia approximately maintained, and a hopeful beginning 

 has been made in hatching red salmon in Alaska. 



