132 



TABLE XI. -Continued. 

 OCTOBER AND NOVEMBER. 



Average, 



2-78 

 2-78 



2-47 

 2-47 



These Tables show the following facts about the male salmon : 



1. In all the groups of fish the thick muscle contains more proteid 

 than the thin, 



2. The upper-water tish have a smaller percentage of nitrogen in 

 their muscle than the estuary fish. 



3. The total amount of proteid in the musculature is less in upper- 

 water fish than in estuary fish, the upper-water fish of October and 

 November being especially poor. 



4. The testes become richer in nitrogen as the season advances. 



5. The total proteid of the testes is greater as the season advances. 



G. The loss of proteid from the muscle is greater than the gain by 

 the testes, there being a surplus loss available for the production of 

 energy and processes of repair. 



This surplus loss is much greater than in female fish, and con- 

 sequently a much larger amount is available for energy. 



The changes being exactly comparable to those observed in female 

 salmon, it may be concluded that male salmon, like female salmon, 

 have sufficient proteid stored in their muscles to meet all their require- 

 ments in fresh water, and that this proteid is called on to supply the 

 wants of the growing testes, and for the liberation of energy. 



SALMON OF 1895. 



The small number of fish available for analysis prevents averages 

 being struck arid accurate comparisons being made. The results 

 obtained, and to be seen in Tables 12, 13, 14, and 15 show that the 

 amounts of proteid in the muscle and genitalia of these fish vary withir 

 the same limits as were found in the 1896 fish. No notes are available 

 as to whether the fish included in these Tables are fresh run or havt 

 been in fresh water for some time, but by comparing the amount of muscle 

 nitrogen per fish of standard length with that of the 1896 fish they can 

 be readily classified. Thus 31, 19, and 40 are evidently fresh run, as 

 their muscle contains as much nitrogen as the muscle of the fresh run 

 1896 fish of the corresponding periods, and 29, 39, and 43 are evidenth 

 fish which have been in fresh water for some time, their musculature 

 being in the condition found in upper- water fish of 1896 of thf 

 corresponding periods. The condition of the genitalia corroborates tVm 

 contention. 



[TABLE 



