Ward. — Migration of the Sockeye Salmon 397 



jumping at intervals along the shore on which we were en- 

 camped. 



In Lake Klutina itself conditions seemed to be equally 

 definite. This body of water is crescentic in form and some 

 25 miles in length, with a maximum breadth at the center of 

 the crescent of about 4 miles. I watched carefully for the 

 appearance of salmon during all of the time we were either 

 moving along on the beach or following close to the shore in 

 our boat. Fish were seen jumping regularly in the water 

 adjacent to each bank, but in no instance did I find them jump- 

 ing in the open water of the lake. Now this evidence is ob- 

 viously imperfect, but it indicates the same conditions I have 

 found elsewhere and it agrees with the situation in Lake 

 Tazlina which we studied a month later. It looks much as 

 if the fish in their movements followed the general shore 

 outline of the lake and in the rivers also moved along near 

 the banks. Much more evidence will have to be collected 

 before one can accept this as a final demonstration. Mean- 

 while, it may be taken as a working hypothesis. There is 

 every reason to accept it as the only possible condition of 

 movement through difficult channels, such as the Abercrombie 

 Rapids, and it will aid in explaining the conditions of move- 

 ment into subordinate streams. 



The situation just pointed out has a very direct and im- 

 portant bearing on fixing limitations on the fishing of the 

 stream. The Copper River is one of those few streams in 

 which fishing for red salmon is allowed in fresh water. Miles 

 Lake, just below the rapids, is viewed as a splendid fishing 

 ground, and large numbers of fish have been taken in the rapids 

 also. At present fishing is confined to part of one shore, and 

 is entirely forbidden on the other bank. It is apparent at 

 once that if the streams of migrating salmon which pass up 

 both banks go to different spawning grounds, then this method 

 is directly responsible for the depletion of the run ^at one place, 

 and conversely serves for the protection of those fish that 



