“26 Brown ‘Trout 
feet in depth can usually sustain about two hundred trout to the acre, 
while one of the same depth at an altitude of rooo feet will only 
produce food for half that amount. The owners of lochs usually pay 
far too little attention to this when stocking them, and in their manage- 
ment afterwards. 
Large sums of money have been spent introducing Loch Leven 


Fic. 177.—13 lbs., Loch Rannoch. 25th June 1906. 
trout into lochs which contain small trout that are scarcely worth 
catching, in the belief that the size of the trout will be improved in 
this way. Instead, however, of increasing the size, those who do 
this are selecting the best possible means of reducing it. The 
small size is caused by there being too many trout for the quantity 
of food in the loch. Reduce the number of trout and the size will 
very soon increase. This can be done by netting and curtailing the 
spawning-ground, or by fishing it well. It seems rather strange that 
those who have the care of lochs give them so little attention. One 
