110 KENNET VALLEY FISHERIES 



but 300 stock Rainbows and 500 stock Brown Trout 

 are also used. These domesticated fish are fenced oft' 

 in another portion of the river above the mill (see 

 Plate XVIII.). The circumstances surrounding are 

 admirably calculated to produce a strong and healthy 

 stock. The water contains a very large amount of 

 natural food, flowing as it does through extensive beds 

 of watercress and other food-producing weeds. 



Some 70,000 Fario fry are reared annually and fed 

 on natural food peculiar, I believe, to these Fisheries, 

 but the particulars of which I am not permitted to 

 disclose. These Fisheries are within an easy distance 

 of London. 



In the Kennet Valley Fisheries, which rear, princi- 

 pally on Natural Fish Food, a very fine and healthy two- 

 year fish for stocking rivers, they make a specially pre- 

 pared Food for streams in which there is a scarcity of 

 natural food, common to some rivers in early spring. 

 They also supply waterside and aquatic plants of all 

 kinds, including trees, etc., which will afford cover for 

 the angler and shade and insect food for the fish ; 

 plants suitable for river margins and shallow water ; 

 and. other varieties for the deep water of lakes and 

 rivers, etc. 



THE INFLUENCE OF TEMPERATURE, ETC. 



Variations in the temperature of the air and water 

 exercise a most important influence on aquatic life. 

 The relative increase in the temperature of water 



