68 Investigations on the Life-History 



TABLE VIII. 



Showing Average Weight of Ovaries per Fish of Standard Length ;- 



* Single Fish. 



Or taking these together : 



TABLE IX. 



Showing Average Weight of Ovcvries per Fish of Standard Length: 



This gives an increase from May to November of from 1 to 1 1 '9 in the 

 sea, or 1318 grms. per fish of standard length, and from 1 to 8*5 

 in the river, or 1967 grms. per fish of standard length. It will 

 thus be seen that although in the upper waters a greater amount of 

 material per fish of standard length is laid on by the ovaries, their rate 

 of growth, considering the weight with which they start in May, is quite 

 as great in the sea as in the river. 



Throughout every part of the season there is a most marked difference 

 in the ovaries in the upper reaches of the river and at the mouth. 



In May and June the ovaries of the fish in the upper reaches are 

 117 per cent, heavier than those at the mouth, while in October and 

 November they are 55 per cent, heavier. 



(d) Length of Salmon. 



6. The length of the fish coming to the mouth of the river increases 

 markedly in October and November, while the length of fish in the 

 upper reaches remains fairly constant throughout the season, and 

 corresponds to the length of fish at the mouths from May to August. 



TABLE X. 



Showing Average Length of Fish : 



