222 DOMESTICATED TROUT. 



eating, at 75° begin to die, at 80° die faster, and at 

 90° all die. Seth Green's book says that trout will 

 die at 68°.* This may be the case in New York, but 

 it is not so in New England. Trout in our vigorous 

 swift running water will sometimes live through 75°. 

 Still I consider 75° very dangerous, and anything over 

 70° unsafe. 



There is no remedy for the water heating up, except 

 artificial cooling. If you have ice enough, you can do 

 something in that direction in a small stream as long 

 as the ice lasts ; but it is a forlorn hope. However, 

 if you find the water heating to a fatal extent, and 

 think it worth while to try to save them with ice, first 

 diminish their rations or stop them altogether, make 

 the current as swift as possible, and then do what you 

 can with ice. You will probably save some, if the 

 heated term does not last too long. But if your brook 

 heats up so as to require the application of ice, in any 

 but very exceptional instances I should say select 

 another place for your operations. Ice may save the 

 fish, but it is paying too dear for the whistle, and it is 

 coming a little too near danger to be desirable. 



4. Handle the fish cm-efiilly. Handle the fish care- 

 fully when you have occasion to handle them at all, 

 which will not be often, except in sorting, in moving 

 from one pond to another, and in spawning. It makes 

 a great difference in handling and carrying trout 

 whether it is hot or cold weather. In winter you can 

 do almost anything with them, short of using actual 

 violence, without killing them ; but in very hot weather 



* Trout Culture, p. 52. 



