170 FISH CULTUEE 



fry or fingerlings they are too small to sort, 

 but through the agency of heavy feeding there 

 will be a sufficient growth to warrant the work 

 being done for the first time about the middle 

 of June. There should be a second sorting in 

 August and a third not later than the middle of 

 October. 



In ordinary circumstances the fish can be 

 divided, in June, into three classes, or at most 

 four, and it is probable that the same number 

 of grades can be maintained both in August 

 and October. The nursery-ponds will continue 

 to be the abiding place of the fish after both 

 the June and August sortings. After this work 

 in October they are not returned to the nursery- 

 ponds, but transferred to the yearling-ponds, 

 where they remain until after they reach the 

 age of 20 months, or until the spawning period. 

 After having the spawn taken from them the 

 fish are transferred to their final home in the 

 largest adult-ponds. 



During the two or three months immedi- 

 ately following the recovery of the fish 

 from the labour of spawning, or the or- 

 deal of being stripped, trout grow faster 



