GROWTH AND MATURITY OF SALMON IN THE OCEAN 
51 
beyond this point. The points that show the average size of the fish of tliis age 
group taken in the various collections are distributed quite closely about the trend. 
The fish that were taken in the river, however, tend to be smaller toward the end of 
the season than at the beginning, as is shown by the downward slope of the line of 
60 
so 
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[3 s/oec/men. 
e 
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1 
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1 0 
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1 ^ 
1 „^ 
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1 — 
1 
1 
1 
1 • 
1 
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_L 
Fig. 14.— Length of fish in their second year, ocean nuclei. As in the illustrations showing 
sizes of eggs, the upper and lower limits of twice the standard deviation (±2(7) are shown 
by the vertical lines extending from the points that indicate the position of the mean. The 
same conventions have been used in the other illustrations of length 
trend, and the deviation of the points from the trend is distinctly greater than in the 
case of the fish taken outside. 
FISH IN THEIR THIRD YEAR, OCEAN NUCLEI 
Figm-e 15 shows the variations in the length of the fish in their third year, ocean 
nuclei. The trends for the fish of the two groups — ^those taken outside and those 
