THE FEEDING OF SALMON 



119 



" This gives an increase from May to November of 

 from 1 to 11 "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." 



For the growth and development of those ovaries 

 a very large amount of fat is necessary, since the 

 constitution of the ovaries is very largely of fat. 



Now the average amount of fats per fish of stan- 

 dard length is given for both muscle and ovaries as 

 follows (Report, p. 97) : — 



Here we see very plainly how with the decrease 

 of muscle fat the ovary fat increases. Taking the 



