97 
loss of seventy-five per cent. of this number we have left 
70,312,500. At the end of the third year we would have 
1,068,750 spawning females casting on an average 450 
eggs each amounting to 480,937,500. Deducting from 
this amount seventy-five per cent. for loss, and we have 
left 120,234,375. These added to the original plant, 
after having deducted therefrom for loss on the original 
plant twenty-five, ten and five per cent. for the three 
years, and we have left as the result of a 5,000,000 plant 
193,753,125. ; 
Now let us take 100,000 yearling trout: At the end 
of the first year after planting we deduct ten per cent. 
for the mortality in the adult fish which leaves us 90,000. 
Of this number one-third being females, we would have 
30,000 spawning fish which would cast on an average 
250 eggs apiece. This would give us 7,500,000 and 
deducting seventy-five per cent. for mortality we have 
left 1,875,000. ' At the end of the second year after 
planting after having deducted five per cent. loss for 
adult fish, 85,500. One-third of these being spawners, 
will cast 450 eggs, each amounting to 12,825,000. Deduct 
from this amount seventy-five per cent. for mortality 
and we have left 3,206,250. At the end of the third 
year after having deducted five per cent. for loss we have 
left 81,225 fish. One-third of this number being females 
will cast on an average goo eggs to each fish amounting to 
24,367,500. From this amount deduct seventy-five per 
cent. for loss, leaving 6,091.875. 
At the end of the third year we must also take into 
consideration the fry hatched from the fish hatched at 
the end of the first year which will have arrived at their 
first spawning age. This number will amount to 1,875,000. 
From this amount deduct twenty-five per cent. for mor- 
tality and we have 1,406,250. One-third of these being 
females leaves 468.750 spawners which will cast 250 eggs © 
apiece amounting to 117,187,500. Deducting from this 
quantity a loss of seventy-five per cent. and we have left 
