5o MAKING A FISHERY. 



weeds ; and if the quantity of natural food is 

 plentiful, and the surroundings are not such 

 as to lead to their being scared away, they 

 speedily recover their condition. Any paucity 

 of food is supplemented by cannibalistic raids' 

 on their own or their neighbours' offspring ; and 

 when these means of satisfying appetite are 

 exhausted, they make the best of their way to 

 deeper parts of the river, which are more prolific 

 of animal life. Hence it is desirable that all 

 available means of keeping up thf> food supply 

 should be encouraged, as well for the protec- 

 tion of the fry as for the improvement in the 

 condition of the adult fish. In the due appor- 

 tionment of a shallow in weeds and gravel, 

 these points should be borne in mind, as well 

 as the necessity for slack places below patches 

 of weeds or other obstructions, where feeding 

 fish can rest without great exertion. The 

 absence of such places, which is the result of 

 wholesale clearing away of all weeds, will infal- 

 libly result in the migration of the larger trout 

 to quieter and more favourable water. 

 The side-and- Many plans have been tried of arranging the 



bar system. ... .... 



weeds on a shallow so as to carry out this idea, 

 but so far none known to me has proved so 

 successful as the side-and-bar system. This 

 system consists of leaving on the shallows, 

 across the river from bank to bank, bars of 



