STOCKING. 139 



there are four methods of stocking, any one of 

 which, under favourable conditions, may, in a 

 longer or shorter time, prove efficacious. They 

 are : Firstly, by means of eyed ova, planted in 

 suitable portions ; secondly, by fry turned into 

 the stream itself, or into carriers properly fenced 

 off; thirdly, by yearlings ; and fourthly, by two- 

 year-olds, or even larger trout. 



When the fish breeder has spawned the Eyed ova. 

 female trout, the eggs being deposited in a dry 

 dish, a small quantity of milt from a male is 

 expressed on to the dish, and the eggs and milt 

 are mixed by tilting the dish gently backwards 

 and forwards. They are, after a few minutes, 

 put into a vessel of water and thoroughly 

 washed, until every trace of cloudiness caused 

 by the presence of superfluous mil-t is removed. 

 The eggs are then deposited in the hatching 

 troughs, and the following day all opaque or 

 unimpregnated ones are picked out, and from 

 time to time during the period of incubation 

 this process of removing opaque eggs . is 

 repeated. After the lapse of a certain number 

 of days, varying according to the temperature 

 of the water, the ova will have arrived at a 

 stage of development when two dark spots are 

 distinctly visible. These dark spots are the 

 eyes of the embryo within the egg, and at this 

 stage the eggs are called eyed ova. 



