AGE AND GROWTH OF THE CISCO 
271 
ANNUAL INCREMENTS OF GROWTH 
VARIATION IN THE AMOUNT OF GROWTH IN DIFFERENT CALENDAR YEARS 
Tables 50 to 54 show the calculated annual growth increments for each of the 
best represented age groups in the collections of each cisco population. (In Clear 
Lake all age groups below the IX group were included.) The arrangement of the 
tables is such that each horizontal row shows the growths in different calendar years 
of fish of the same age and in the same year of life. The vertical columns show 
growth increments for the same calendar year but for fish that are either of different 
age or in different years of life, sometimes both. Each diagonal row shows the 
growth increments in the different calendar years of a single age group in a single 
year’s collection. The calendar year corresponding to the first year of life of any 
particular age group is the year of birth, while the year of capture of each age group 
is one year later than the calendar year of the last growth increment shown in the 
table for that age group. 
Table 50. — Annual calculated growth increments in millimeters of the' Trout Lake cisco, ages III to 
V, according to calendar year and year of life 
Age 
Year 
of 
life 
1924 
1925 
1926 
1927 
1928 
1929 
1930 
Aver- 
age 
V .. 
12 
9 
10.5 
4 
13 
10 
11.5 
3 
19 
17 
18.0 
2 
34 
37 
35. 5 
1 
82 
81 
81.5 
IV . 
4 
10 
10 
11 
10.3 
3 
13 
19 
20 
17.3 
2 
35 
36 
37 
36.0 
1 
85 
82 
78 
81.7 
III 
3 
14 
22 
17 
17.7 
2 
39 
38 
36 
37. 7 
i 
84 
79 
84 
82. 3 
Table 51. — Annual calculated growth increments in millimeters of the Muskellunge Lake cisco, ages 
II and III, according to calendar year and year of life 
Age 
Year 
of 
life 
1925 
1926 
1927 
1928 
1929 
1930 
Aver- 
age 
HI . 
3 
20 
25 
18 
21.0 
2 
37 
47 
49 
44.3 
1 
105 
85 
96 
95.3 
II 
2 
48 
48 
40 
45 3 
i 
99 
95 
98 
97.3 
Table 52. — Annual calculated growth increments in millimeters of the Silver Lake cisco, ages II to 
VI, according to calendar year and year of life 
Age 
VI 
V. 
IV. 
Ill 
II. 
1923 
1924 
1925 
1926 
1927 
1928 
1929 
1930 
15 
12 
16 
19 
27 
16 
22 
23 
40 
41 
72 
78 
14 
20 
14 
19 
20 
18 
27 
25 
24 
39 
46 
46 
76 
74 
80 
16 
21 
17 
25 
26 
27 
46 
48 
52 
79 
78 
80 
30 
33 
29 
54 
57 
54 
73 
77 
83 
60 
52 
47 
- 
90 
99 
104 
Aver- 
age 
13.5 
17.5 
21.5 
22.6 
40.5 
75.0 
10.0 
19.0 
25.3 
43.7 
76.7 
18.0 
26.0 
48.7 
79.0 
30.7 
65.0 
77.7 
49.7 
97.7 
