FOURTEEN TELEOSTEAN FISHES AT BEAUFORT, N. C. 
413 
10 millimeters is attained. In these areas they remain throughout their first summer. 
Although the majority leave their first summer’s habitat when cold weather comes, a 
few remain there throughout the winter. 
GROWTH 
In the present studies an effort was made to secure information, mainly, relative 
to the rate of growth of the 
white perch during its first 
year of fife. However, 
older fish often were taken 
and such examples have 
been measured and are 
included in frequencies in 
Table 5. Table 6 and Fig- 
ure 40 include only the data 
pertaining to the O class. 
Since this fish has a com- 
paratively short spawning 
season, little if any over- 
lapping occurs between the 
O class and the older fish 
during the first 9 or 10 
months of fife. It is com- 
paratively easy, therefore, 
to follow the rate of growth 
of the young fish during 
that time. 
Tables 5 and 6 show 
that the young of the white 
perch grow rapidly during 
the first several months of 
life. For example some of 
the individuals attained a 
length of 30 to 39 millime- 
ters in June when only 2 % 
months old at the most. 
The average length for 
June for 1,642 specimens 
measured, however, is only 
8.7 millimeters. This low 
average is due to the very 
large number of recently 
hatched fry, less than 5 
millimeters long, which oc- 
cur in the collections. In 
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MAY JUNE JULY AUG. SEPT OCT. NOV. DEC JAN. FEB. MAR. APR 
Figure 40.— Growth curve of young white perch, based on Table 6. Solid line, 
average of all fish; broken line, smallest fish; dot-and-dash line, largest fish 
July, when the smallest fry taken were 9 millimeters 
and the largest fish 76 millimeters long, the average for 987 fish is 31.9 millimeters. 
In September the young secured range in size from 45 to 122 millimeters, and the 
average size for 559 specimens is 81 millimeters. 
2698—30 3 
