1 6 ESDAILE, Resu/is of the Salmon Scale Research. 



come back again in the summer and the summer fish 

 come back in the spring. 



Passing on to compare the lengths of time spent in 

 the sea between the return from the river after the first 

 spawning and the second return to the river previous to 

 the second spawning, there is again no definite regularity. 

 (See Tables 8 and 9.) All the "spring summer" fish, as 

 they might be called, spent only a few months in the sea 

 between the two spawning periods and the " spring spring " 

 fish and "summer spring" fish spent one year in the sea. 

 Among the " summer summer " fish there are examples of 

 two periods of differing lengths, and the three "grilse 

 summer " fish sho\v as many variations as there are 

 specimens. 



Lastly, there is the consideration of the five fish which 

 were caught on their way up the river to spawn for the 

 third time. Four of these belong to the same type. At 

 each return to the river in three consecutive years they 

 were summer fish, and they onl\' spent seven or eight 

 months in the sea l)etween each return to the river. The 

 fifth specimen spawned first as a spring fish, then as a 

 summer fish, and was finally caught as a spring fish on its 

 third return to the river. Between the first and second 

 spawning the fish was in the sea for only seven or eight 

 months, while between the second and third return about 

 fifteen months were spent in the sea. It is rather curiou.s 

 to notice that this corresponds with the sequence which is 

 indicated in Table 9, "spring," "summer," with a few 

 months spent in the sea between the first raid second 

 return to the river, and " summer," " spring," with a year 

 spent in the sea between the second and third return 

 to the river. 



From Table 8 it would appear that contrary to what 

 would have been exjjected the salmon is not generally an 

 annual spawner. Only 12 specimens out of "j-^^ made the 



