402 THE DRY-FLY MAN'S HANDBOOK 



later to fertilize (and fertilize successfully) salmon eggs, 

 there is every reason to believe that similar treatment 

 with trout-milt would prove equally successful. 



The exact method to be adopted by the managers of 

 fisheries must depend in a great degree on the nature 

 of their water. Given plenty of spawning shallows 

 they should introduce eyed ova, turned down in suit- 

 able places a week or even less before they are due to 

 hatch, and any trout-breeder can tell within a few days 

 when a particular batch of eggs will hatch out. If 

 preferred, the eggs can be hatched in the hatchery and 

 the alevins turned down. It is most important that 

 they should be laid down at the right moment, and 

 Mr. Corrie, in the second part of his article on " Re- 

 stocking of Trout Streams," in the " Journal of the 

 Fly-Fishers' Club," is so explicit on this that I cannot 

 do better than quote his words verbatim. " The age 

 when alevins must be liberated into the water they are 

 intended to stock is just before the little fish have 

 quite absorbed the umbilical sac (an age about which 

 the hatchery owner is unlikely to make any error). 

 The alevins on being liberated will dart to the bed of 

 the stream and take cover under the nearest stones 

 they can find. They have, and will retain, all the 

 instincts of self-preservation common to wild fry 

 hatched in the. open river, and have nearly as good a 

 chance of growing to maturity as the hand-fed, pond- 

 raised yearling of infinitely greater cost. Most fish- 

 eries have some places suitable for turning down trout 

 fry ; the exact positions are easy to locate, and often 



