SUITABLE FISH AND WATEES 



however, some sluggish rivers where brown trout 

 do not thrive when they are introduced. In 

 such rivers and in many ponds in the South of 

 England I believe that no better fish exists than 

 the rainbow trout. I say particularly in the 

 south, because I do not think that the rainbow 

 trout will ever really thrive and breed in cold 

 waters. I have at other times given numerous 

 examples which go to show that the rainbow will 

 only thrive in warm waters. 1 I will therefore 

 only quote the case of New Zealand. The rain- 

 bow trout was introduced into both islands, but 

 while it thrived amazingly in the warm waters 

 of the North Island, it has proved a comparative 

 failure in the cold waters of the South Island. 



While the common or brown trout (Salmo 

 fario) and the rainbow trout (Salmo irideus) are, 

 in my opinion, to be strongly encouraged in the 

 waters suitable to their respective qualities, the 

 American brook trout (Salvelinus fontinalis) does 

 not seem to have met with the approval of most 

 of the authorities on pisciculture in this country. 

 My experience of this fish is not sufficient for 

 my holding any very strong views with regard 

 to its suitability to British waters. In one case 



1 The Rainbow Trout. Lawrence & Bullen, London. 

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