200 
PACIFIC SCIENCE, VoL XX, April 1966 
TABLE 3 
Bilateral Variation in the Number of Branchiostegal Rays 
sample source 
(year) 
SPECIES 
SEX 
NUMBER 
EXAMINED 
% 
asymmet- 
rical 
% 
asymmetrical 
TOWARD LEFT 
MEAN 
OF 
(L-R) 
100 
(P) 
Nichiro 
sockeye 
male 
41 
61.0 
80.0 
.415 
< 1 
50°-53°N, 
female 
72 
54.2 
87.0 
.472 
< 1 
160°-178°E (1956) 
total 
113 
56.6 
84.0 
.451 
< 1 
Karluk River 
sockeye 
male 
35 
60.0 
90.0 
.543 
< 1 
(1957) 
female 
15 
46.7 
100.0 
•533 
< 1 
total 
50 
56.0 
89.0 
.540 
< 1 
Naknek River 
sockeye 
male 
14 
64.3 
100.0 
.857 
< 1 
(1957) 
female 
18 
77.8 
100.0 
.889 
< 1 
total 
32 
71.9 
100.0 
.875 
< 1 
Egegik River 
sockeye 
male 
22 
81.8 
94.0 
.818 
< 1 
(1957) 
female 
24 
70.8 
100.0 
.750 
< 1 
total 
46 
76.1 
97.0 
.783 
< 1 
Kvichak River 
sockeye 
male 
13 
38.5 
100.0 
.385 
< 5 
(1957) 
female 
16 
87.5 
100.0 
.938 
< 1 
total 
29 
65.5 
100.0 
.690 
< 1 
Ozernaya River 
sockeye 
male 
46 
52.2 
95.8 
.522 
< 1 
(1959) 
female 
91 
65.9 
95.0 
.659 
< 1 
total 
137 
61.3 
95.2 
.613 
< 1 
Combined cockeye 
male 
171 
59.6 
91.2 
.556 
< 1 
samples 
female 
236 
64.0 
94.7 
.640 
< 1 
total 
407 
62.2 
93.3 
.604 
< 1 
MV "Celtic” 
chum 
male 
39 
76.9 
73.6 
.820 
< 1 
5Q°-57°N, 
female 
31 
80.6 
96.0 
.774 
< 1 
145°-154° W (1956) 
total 
70 
78.6 
94.5 
.800 
< 1 
Ketchikan 
chum 
male 
13 
76.9 
100.0 
.923 
< 1 
(1959) 
female 
9 
77.8 
100.0 
1.333 
< 1 
total 
22 
77.2 
100.0 
1.090 
< 1 
Ozernaya River 
chum 
male 
58 
75.9 
90.9 
.655 
< 1 
(1959) 
female 
39 
92.3 
100.0 
.974 
< 1 
total 
97 
82.5 
95.0 
.784 
< 1 
Bolshaya River 
chum 
male 
24 
70.8 
88.2 
.625 
< 1 
(1959) 
female 
67 
77.6 
100.0 
.900 
< 1 
total 
91 
75.8 
97.1 
.824 
< 1 
Okhotsk River 
chum 
male 
29 
62.1 
94.4 
.552 
< 1 
(1959) 
female 
41 
73.2 
100.0 
.854 
< 1 
total 
70 
68.6 
97.9 
.728 
< 1 
Combined chum 
male 
163 
73.0 
92.4 
.693 
< 1 
samples 
female 
187 
80.2 
99.3 
.904 
< 1 
total 
350 
76.8 
96.3 
.806 
< 1 
Ketchikan 
pink 
male 
31 
67.7 
95.2 
.677 
< 1 
(1959) 
female 
28 
75.0 
100.0 
.893 
< 1 
total 
59 
71.2 
97.6 
.780 
< 1 
