THE SALMON FAMILY 71 



fish, but still did not feed, although the worms, as they 

 were thrown in, sailed right past his nose. 



After being a week in the pond the brown trout 

 under consideration took his food like the rest of the 

 fish. By the way he now fed it was quite obvious that 

 he was very hungry, and yet he would not feed until 

 he was accustomed to his new surroundings. 



The pond being not altogether unlike his usual habi- 

 tation, this brown trout fed in a week. In the past, 

 I have put wild adult brown trout in tubs and tanks 

 supplied with natural food and running water, but they 

 never became accustomed to their surroundings and 

 refused to eat. 



The fact that a salmon has come up into fresh water 

 to spawn does not appear to me to be the main reason 

 why they do not feed in fresh water. Early spring fish 

 coming up into fresh water ten months before they 

 spawn do not feed during the whole of the time, and 

 yet a salmon that remains in the sea until the late 

 autumn feeds freely until a month or two before spawn- 

 ing, and then only ceases to feed in fresh water. 



Rainbow trout, dace, and roach have spawned in the 

 pond, and all these fish fed freely the whole time. 



I believe the main reason for the non-feeding of 

 salmon in fresh water is that the change of environment 

 from the sea to the river, and from salt to fresh water, 

 causes the fish to be " off colour." 



Salmon will lie motionless for hours together at the 

 bottom of a deep pool with young trout and parr 



