256 
BULLETIN OF THE BUREAU OF FISHERIES 
Table 11. — Variation in number of vertebrae in Cook Inlet and Kodiak- Afognak district 
Locality 
Date 
Vertebrae 
48 
49 
50 
51 
52 
53 
54 
55 
56 
2 
16 
36 
6 
1 
1 
32 
56 
11 
4 
21 
29 
9 
1 
4 
39 
61 
18 
3 
2 
29 
35 
10 
4 
36 
44 
15 
1 
8 
16 
1 
4 
25 
42 
14 
2 
1 
4 
11 
27 
7 
1 
1 
u 
32 
7 
1 
1 
— 
26 
228 
378 
98 
8 
— 
1 
27 
38 
9 
3 
14 
26 
7 
14 
13 
3 
1 
8 
11 
4 
1 
1 
7 
15 
2 
5 
14 
23 
9 
1 
1 
3 
71 
106 
27 
1 
2 
12 
13 
2 
4 
13 
16 
3 
1 
20 
180 
261 
66 
3 
1 
9 
34 
51 
5 
1 
30 
63 
17 
3 
1 
5 
42 
82 
35 
1 
2 
21 
52 
12 
1 
Num- 
ber 
Mean 
Prob- 
able 
error 
Standard 
deviation 
of dis- 
tribution 
Kaehemak Bay: 
Halibut Cove lagoon___ 
Homer Spit lagoon 
McEwan Flats 
McDonald Spit lagoon. 
Off McDonald Spit 
McDonald Spit 
Halibut Cove Light 
Halibut Cove lagoon 
Halibut Cove Light 
1926 
1926 
1926 
1926 
1926 
1926 
1927 
1927 
1927 
1927 
61 
100 
64 
125 
76 
100 
25 
87 
50 
52 
52. 80 
52.77 
52. 72 
52.82 
52.70 
52.73 
52.72 
52.82 
52.68 
52.79 
0. 062 
.044 
.071 
.049 
.056 
.054 
.091 
.062 
.092 
.084 
Total - 
Shuyab Strait.. 
1925 
1925 
1925 
1926 
1926 
1926 
1927 
1928 
1928 
740 
75 
50 
30 
25 
25 
52 
209 
29 
36 
52. 76 
52.73 
52.74 
52.63 
52.84 
52.72 
52.75 
52. 76 
52.52 
52.50 
.031 
.053 
.065 
.081 
.119 
.090 
.086 
.034 
.091 
.090 
Total . 
531 
52.72 
.022 
Dogfish Bay 
Old Harbor 
Shearwater Bay.. 
Zachar Bay 
1925 
1926 
1928 
1928 
100 
115 
165 
87 
52.50 
52.95 
52.91 
52.85 
.051 
.050 
.041 
.048 
0.720 
.646 
.838 
.804 
.726 
.798 
.531 
.857 
.947 
.927 
.790 
.680 
.770 
.650 
.880 
.666 
.920 
.728 
.724 
.799 
.757 
.763 
.790 
.776 
.670 
Table 12. — Variation in number of vertebrae in western Alaska 
Locality 
Date 
Vertebrae 
Num- 
Mean 
Prob- 
able 
error 
Standard 
deviation 
51 
52 
53 
54 
55 
56 
57 
ber 
of dis- 
tribution 
1926 
4 
5 
55 
39 
3 
1 
107 
53. 33 
0.053 
0.806 
1923 
1 
7 
36 
130 
213 
62 
7 
456 
54. 67 
.029 
.928 
1927 
1 
5 
2 
8 
53.13 

( 1928 
3 
21 
15 
1 
40 
53. 35 
.067 
.654 
Unalaska - 
1 1928 
6 
22 
16 
44 
53.23 
.068 
.668 
1 1928 
( 1928 
33 
30 
n 
12 
50 
49 
53. 10 
53.22 
.055 
.065 
.574 
.677 
— 
5 
2 
20 
106 
54 
3 
183 
53.22 
.032 
.650 
1926 
2 
43 
77 
18 
140 
52.79 
.038 
.671 
In southeastern Alaska (Table 13) the three localities in Chatham Strait, Point 
Gardner, Tebenkof Bay, and Larch Bay show no differences which could be regarded 
as significant even were the samples truly representative. Both Craig and Stephens 
Passage show significant differences from these three Chatham Strait localities. 
Craig and Stephens Passage do not differ significantly from one another, but con- 
sidering their geographical location, with the three Chatham Strait localities inter- 
posed, it may be supposed that they represent separate populations. In support 
of this contention, there are large spawning grounds, occupied at the same season 
of the year, both at Craig and in Stephens Passage. The samples from Gravina 
Island, Whale Bay, and Yakutat are only considered to be sufficient in numbers to 
give a general indication of the true mean. 
