Appendix. 7 1 



but the number, whatever it is, should be adjusted so as 

 to secure a minimum average of 1 Ib. per trout caught 

 with the rod. 



NUMBER REQUIRED TWO-YEAR-OLDS USED. 



The number required for a single stocking of two-year- 

 olds (under the suppositions above) does not materially 

 differ from the number of yearlings, viz. : 50,000 for 500 

 acres of 12 feet depth and under as the loss at Howie- 

 toun between year- olds and two-year-olds for the year is 

 under 5 per cent. "But when the case of annual stocking 

 is considered, \ of 50,000 or 12,500 per annum is nearly 

 equivalent, as although single stocking with two-year- 

 olds requires to be triennial, and it would give 16,500 

 approximately, yet the 15,000 allowed for casualties with 

 yearlings is not required, and thus restores the balance. 

 However, if the two-year-olds are retained as T Ib. trout, 

 that is, when caught the same season they are placed in 

 the loch, some addition must be made to the annual 

 stocking. 



COST OF STOCKING OVA IN REDDS. 



The redds being mere ditches communicating with the 

 natural stream, are not in themselves expensive. In 

 favourable situations two men can cut a redd sufficient for 

 20,000 eggs in two days, and the first cost of 20,000 eggs 

 is about 7, 10s. But the two burns running in to the 

 Lake of ... are not capable of rearing sufficient 

 fry to keep up a fair stock of trout. Therefore, though 

 two or three redds might be made advantageously, they 

 would only provide a small supplementary stocking. 



COST OF STOCK FRY. 



Fry cost about 75 delivered per 100,000, but have no 

 advantage over a corresponding amount of ova in redds 

 100,000 three-month-old fry is practically the produce of 



