40 



DEPARTMENT OF GAME AND FISHERIES 



No. 9 



The water supply at each station varies, being most voluminous at the 

 trout-rearing stations at Dorion and Sault Ste. Marie. In each case the quality 

 of the water, physically, chemically, and biologically, is highly satisfactory. 



The development of trout-rearing stations is the outcome of a great and 

 insistent demand for more and larger fish; and in the populated districts where 

 waters are more heavily fished, the consistent introduction of large fish appears 

 to be the only practical means of maintaining good fishing. A glance at Appendix 

 No. 4 shows that the general trend in the culture of trout is in this direction, but 

 it should be noted that there is not yet sufficient scientific evidence of a quanti- 

 tative nature on the survival of deposited fry to discredit their introduction in 

 suitable small tributary streams. 



Yearling speckled trout, Xormandale trout ponds. 



The establishment of District Rearing Stations is, we believe, a step in the 

 right direction, for two reasons at least: 



1. Long-distance hauls are curtailed or eliminated. This is important 

 economically and also from the standpoint of the health and vigour of the fish 

 on arrival at their destination. 



2. Trout are being reared in waters which flow over or through the same 

 rock formation as waters in which the fish will be ultimately introduced, provided 



e waters are suitable biologically. 



This method, though reasonable from the standpoint of transportation 

 id protection of trout from injury due to long hauls and from sudden change 

 a the reactio* )r chemical content of the water as opposed to that in which the 

 trout were r ed, may not be of any significance as regards the possibility of 

 the fish sur^ . g in waters differing widely in chemical composition, as shown in 

 compariso .ade of a number of waters supplying hatcheries located in the 

 various t of rock formations. 



