64 THE AGE AND GKOWTH OF SALMON AND TEOUT. 



of growth takes place. A comparison of the corresponding tables for salmon 

 and trout will make this clear (see pages 31 and 54). 



With regard to the size which the majority attain previous to migration, 

 I cannot speak from direct experience, seeing that, as already stated, I 

 have not examined any young fish ; the calculated sizes set down in 

 Table XXVIIc. allow us, however, to form a fairly reliable idea of the facts. 

 By availing ourselves of the values denoting what length each trout was 

 when the last winter-band was formed previous to migration, we get the 

 following result : 



The length, therefore, varies between 18 cm, and rather more than 

 30 cm., and these fish are accordingly, when transition to larger growth 

 takes place, considerably larger than either salmon or sea trout. The 

 sizes of the different age-classes have each their range of variation, which 

 advances with age, as does also the average length of the fish. 



