AMATEUE FISH CULTUEE 



marks it is known as a parr 1 . In about fifteen 

 months it loses these marks and becomes quite 

 silvery, being now known as a smolt. Shortly 

 after assuming the smolt dress, the young sal- 

 mon takes its departure to the sea. In some 

 cases the young salmon do not appear to go 

 down to the sea till over two years after being 

 hatched out, but they should always be set at 

 liberty in March, April, or May in the year fol- 

 lowing that in which they were hatched out, 

 according to how far they have developed the 

 smolt or silver appearance. 



If spring water is obtainable, particularly if 

 the water, as is usually the case, is of an even 

 temperature throughout the year, the troubles 

 of the fish culturist are considerably lessened. 

 "Without a building for the hatching troughs it 

 is almost impossible in many places to guard 

 against frost unless such a spring is available. 

 Sediment may be avoided by putting frames 

 covered with flannel at the inlets to the hatching 

 beds, these will, if kept clean, prevent any sedi- 

 ment from coming into the ponds, and will allow 

 plenty of water to flow in. If hatching trays 



1 All the trouts go through this stage, which is dis- 

 tinguished by "finger marks" upon the sides. 



86 



