ACTIVITIES OF SALMON 185 



right spot is selected, and if the spectator approach 

 with the greatest caution and remain apparently 

 immovable and as much concealed as is possible. 



WHEN ENTERING FRESH POOLS 



It has been repeatedly noticed that when salmon 

 are running up a river they display remarkable 

 activity during the first few days after reaching any 

 fresh pool. This cannot be due to an appetite forgotten 

 during the final days of their stay in the lower pool, 

 and resuscitated in response to the exertion of reaching 

 the new water, because the run between these pools 

 has on several occasions been particularly noticed, 

 and it has not been of such a character as to exhaust 

 the fish, and create a temporary demand for food. 

 As a more likely explanation, it may be assumed that 

 their instinctive desire to destroy the possible enemies 

 of their young may be brought into renewed activity 

 by their new surroundings, and when they find that 

 they have demolished the river life in the new pool 

 they will be naturally suspicious as to any fresh 

 moving objects which they see, especially if there has 

 been no alteration in the water, such as a spate, etc. 

 Salmon which have apparently gone off the feed will, 

 when a spate occurs and the water begins to go down, 

 commence to "feed." This, again, can hardly be 

 due to the reaction attendant upon exhaustion, for 

 the salmon have left the more rapid portions of the 

 stream during the spate, and will have been resting 



