15 
currents and temperatures ; but what I wish to impress in 
this paper is that the sea food of the migratory Salmones 
forms a very necessary preliminary study to the great 
question of Salmon culture. 
A diagram expressing the art of Salmon culture would 
contain no broad, hard, rectangular lines, no vivid colouring 
easy to be understood, but flowing curves traced by the ever 
varying intensity of the now few now many circumstances 
whose combination constitute the problem of the migratory 
Salmones. Temperature and food are here, as with the non- 
migratory species, the principal factors. The modes of 
capture and obstructions in rivers also weigh heavily against 
the increase of Salmon. But when one of our watersheds is 
sufficiently artificially stocked so that the advantages of the 
process are brought clearly and directly before the public an 
alteration in the modes of legal capture will assuredly follow. 
Of obstructions in the river it is difficult to treat; many 
upper proprietors prefer good Trout fishing to the pleasure 
of dragging about a few kelts in spring, and it cannot be 
too strongly impressed that Trout are most destructive to 
Salmon spawn, and that Salmon in their turn are after 
spawning most destructive to Trout. 
I am aware it is very commonly held that Salmon do not 
feed in fresh water, probably because in common with all 
large-ovaed Salmonide the ovaries for from two to eight 
weeks completely fill the cavity of the abdomen, and should 
the fish yield to hunger during this time the freshly 
swallowed food causes the immediate extrusion of the ova. 
If Salmon never fed in fresh water a well-mended kelt 
would be a superfluous expression in the parlance of 
fishermen. 
The deduction as to kelts in certain parts of the rivers is 
obvious. 
