186 THE TROUT 



and vanish, and you can close the boxes without fear 

 of an attack from fungus. 



* There is no word/ says Livingston Stone, * in the 

 fish-breeder's vocabulary, that is so associated with 

 loss and devastation as the word fungus. There is 

 nothing with which he has to deal that is so insi- 

 dious and deadly ; ' there must therefore be no 

 thought of cure for fungus. Absolute prevention 

 must be your policy. With boxes well charred, how- 

 ever, and with close attention to cleanliness, fungus 

 should never trouble you, unless you are subject to 

 nightmare. 



Shortly before the last vestiges of the yolk sac are 

 absorbed the packed shoals of alevins begin to leave 

 the corners of the tray, to rise in the water and to 

 distribute themselves more evenly. All desire for 

 co-operation has left them, and henceforth their life, 

 unlike that of the minnow or the gudgeon, will be 

 individual rather than gregarious. Some of the alevins 

 will now be observed poising themselves in the water 

 and darting at particles which float past them, as if 

 making attempts at feeding. 



As soon as the little occupants of the tray have begun 

 to behave themselves in this fashion, they will require 

 wider scope and a greater depth of water. The time 

 in fact has come when they should be allowed to have 



