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salmon, which continue to ascend the rivers during July and 

 August. 



Before entering the rivers, they live a while in the brackish 

 water of the tide-ways, as they do also when they descend to 

 the sea, to render the change from one to the other less abrupt, 

 and to rid themselves of certain parasitical animals, which 

 attach to them, when they remain long either in fresh water, or 

 in salt, as the case may be. 



The spawn is not deposited until the water is greatly below its 

 summer temperature. Professor Agassiz stated personally to ■ 

 the writer, that 42° of Fahrenheit's thermometer, or 10° above 

 the freezing point, was the temperature at which salmon usually 

 cast their ova. It is absolutely necessary, that the water should 

 be aerated, or highly supplied with oiygen ; hence the salmon 

 resort to shallow, pure water, and swiftly running streams, the 

 rapidity and frequent falls in which, impart purity and vitality, 

 by mingling their waters with the atmosphere. 



In this state the young salmon fry are called parrs, and are 

 readily known by their silvery scales, and by their having 

 perpendicular bars, of a dusky gray colour, crossing the lateral 

 line. In this state, the fry remain a whole year in the fresh 

 water, not going down to the sea until the second spring after 

 being hatched. As they readily take both fly and bait, great 

 numbers are often destroyed in mere wantonness ; and it is 

 desirable all colonists should know, that the destruction of these 

 fry, (which from their dark cross-bars and small red spots like 

 the young of trout, are supposed not to be the young of salmon) 

 will inevitably destroy the run of salmon in any river, and tend, 

 with other causes, to the extirpation of this magnificent fish. 

 When parr are taken in angling, they should, if uninjured, be 

 immediately returned to the stream, and every true sportsman 

 will carefully do so. 



The growth of the parr is very slow, but when it has attained 

 the length of T inches, a complete change takes place in its 

 colour. The dark cross-bars disappear, as also the small red 

 spots, and the fish assumes a brilliant silvery appearance. It 



