THE INFLUENCE OF TEMPERATURE. 95 



of the day's fishing were the variation of the kinds of fly that hatched out, and the trout's 

 determination to only look at the artificials which were the same colours and sizes as the 

 natural flies. This was about the best day's fishing I ever had on the Itchen. The trout 

 fought very well indeed well enough to try strength of tackle to its utmost. Nearly every 

 fish when hooked rushed passed me, straight down stream towards deeper water, where the 

 short waders I was wearing did not allow of pursuit. I might have returned to the bank 

 and so got below hooked fish, but the shallow was so clear that much movement on my 

 part must have cleared fish in all directions, so I simply played the fish against the stream, 

 and was fortunate that I had no breaks and very few holds gave way." 



E. V. C. 



A river, then, which can support such a wonderful 

 number of natural fish is eminently suited for trout rearing, 

 and the trout which are reared at Lower Chilland breeding 

 pounds, fully establish the advantages which I claim for such 

 a method ; there are probably not many rivers in England 

 so favourably situated in every way to produce such happy 

 results, but if there are, such a system is well worthy of trial. 



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 assists 

 and quickens the incubation of all sub-aqueous eggs, and 

 hastens the metamorphosis of all insect life. 



Mr. Livingstone Stone is decidedly against the establish- 

 ment of breeding pounds in the natural bed of streams, but 

 his objections are due to the dangers connected with such 

 a locality. Trout, he admits, will flourish most when placed 

 in strong running, natural trout water, plentifully supplied 



