158 DOMESTICATED TROUT. 



violently disturbed, and if they have had a, good stirring 

 up will not generally return to it soon again. Therefore, 

 when you wish to drive them out of a hole or corner, 

 agitate the water violently with a feather, or, better 

 yet, dip up a few cups of water and pour into the 

 corner from a little height above. The effect will be 

 magical. In a few moments the place which it might 

 have taken half an hour to clear otherwise will be 

 willingly deserted. 



Though so very frail at this stage, the alevins will 

 stand the cold wonderfully. I have frozen them sev- 

 eral times so that they were glued tight on to the ice 

 and could not stir, and in most instances it did not 

 seem to hurt them at all. I have taken pains to keep 

 these " frozen thaws " by themselves, where they could 

 be watched for some weeks afterwards. In some in- 

 stances they appeared as well as any trout of their age, 

 and showed no signs of being injured by the freezing. 



If, however, they are frightened while they are 

 freezing in or thawing out, they will, in trying to 

 extricate themselves from their icy fetters, tear them- 

 selves so that they will afterwards die. 



Alevins will also live a long while without change 

 or aeration of the water, if the temperature is low. 

 A hundred young alevins will live a day or two in a 

 gill of water at 34°, incredible as it seems. This is 

 consequently a very favorable time to transport them. 

 As they can stand the cold, you can, by reducing the 

 water to a very low temperature with ice, send them a 

 great distance in small bulk without change or aeration 

 of water. 



