164 FISH CULTUKE. 



CHAPTEE X. 



ON LAKES, POOLS, ETC. 



An immense portion of our water acreage consists 

 of lakes. Such of these lakes as communicate with 

 the sea by means of rivers that are passable to fish 

 are, for the most part, capable of supporting salmon 

 and sea-trout. In some there may be but a badly 

 defined passage to the sea ; in these instances every 

 art that can render such passages practicable to 

 fish should be put into requisition, as the addition 

 of a lake is always most valuable to a river or 

 fishery, being to the salmon a safe resting-place and 

 harbour of refuge. When there are impassable falls, 

 salmon-stairs should be erected (see Appendix); a 

 weir, with hatches at the outlet of the lake, should 

 be placed so as to force back the water, until a 

 sufficient quantity be collected to form a good run- 

 ning volume, on the first favourable rainfall. If 

 salmon or sea-trout exist not already in them, arti- 

 ficial propagation should be undertaken in the small 



