THE FEEDING OF SALMON 119 
Limits of U: Limits of 
Estuary: | Variation. | Water. | Variation. 
MayandJune . ‘ 121 58-175 263 104-415 
July and August . F 284 109-479 510 353-691 
Oct. and Nov. . F 1439 1310-1930 2230 1851-2888 
“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 tats per fish of stan- 
dard length is given for both muscle and ovaries as 
follows (Report, p. 97) :— 
Ovaries. Muscle. 
Estuary. | Upper Water. | Estuary | Upper Water. 
May and June fi . 12 29 768 448 
July and August . : 18 46 770 476 
Oct. and Nov. . | 145 204 426 159 
Here we see very plainly how with the decrease 
of muscle fat the ovary fat increases. Taking the 
