FOR PLEASURE AND PROFIT. 87 



When the fry are three months old the fine perforation screens 

 may be changed for others of coarser perforation, so as to per- 

 mit of the young fry leaving the redds at will, while still pre- 

 venting larger fish getting on the redds. A large number of 

 the fry will avail themselves of the opportunity to leave the 

 redds and seek a living elsewhere, and thus they will gradually 

 populate the adjacent waters in communication with the 

 redds. If too many remain behind after June, a lot of them 

 may be carefully netted out and transferred to suitable quar- 

 ters in any waters clos2 by that it is wished to stock. In 

 August you may take the screen away to let any fish that 

 choose have access to the redds ; but by this time your stock 

 of fry on them should be as small as possible. Thereafter the 

 conduct of the redds I have already instructed you in. You 

 will be fortunate if you rear twenty-five pen cent, of fry from 

 the alevins to the six-months stage. This percentage will 

 cost considerably less than purchasing six-months fry, and 

 certainly they will be more valuable fish, seeing that they have 

 been actually hatched and reared in the water in which they 

 have to live. In concluding this portion of my subject, I again 

 impress upon you the importance of providing plenty of shade 

 for the y cung fish. 



You may purchase fry and stock with them. But I cannot 

 ses wher)3 the advantage of " planting " fry over " sowing" ova 

 conies in ; and I certainly know of a lot of disadvantages. 

 First, there is the difficulty of travelling fish at the time of 

 year when fry are fit to move. If you stock with alevins this 

 objection does not obtain ; but, again, I ask, Wherein lies the 

 superiority of these over fully-eyed ova? Secondly, I main- 

 tain that you cannot expect fry to do so well if planted as fry 

 as those reared from ova sowed on redds, seeing that the latter 

 are hatched in the waters they are tot live in ai consideration 

 to which I lend much importance. I have known it to mean 

 the difference between success and failure. I admit the pro- 

 bability of a loss in the alevin stage, and even a big loss in the 

 early fry stage; but consider the very large number of eggs 

 you can sow at the cost of a few thousand fry delivered to your 



