Fish Migration 199 



thousands of miles without taking a single 

 meal on the journey. 



The salmon is the most spectacular of 

 migrating fish, for to ensure the con- 

 tinuance of its race, it must ascend its 

 native river, and with its goal in sight 

 surmount obstacles that might daunt the 

 strongest of men. A salmon will leap 

 eight foot boulders or tire itself to death 

 in the attempt. But no amount of 

 courage can avail against the insidious 

 river-side factory. In this country the 

 only encouragement given to the king of 

 sporting fish is a half-hearted regulation 

 restricting dye-works and a mesh of 

 stake nets. In the United States the 

 salmon nets are laid down by the fishery 

 boards in restricted areas, and such 

 animals as may harm the fry are care- 

 fully weeded. In California there is a law 

 which ordains that every fisherman shall 

 release four young fish for every adult 

 individual caught. 



