Merkouris et al.: Genetic diversity in Chionoecetes bairdi and C. opilio 
529 
Table 3 
Allele frequency estimates for Chionoecetes bairdi and C. opilio collections, 
quency of 0.000. 
ND indicates no 
data. 
Dashed lines indicate fre- 
Population 2 
AAT-l 
* 
AAT-2* 
AH-2* 
n 
*100 
*64 
*210 
*120 
n 
*100 
*131 
*69 
n 
*100 
*110 
*83 
Chionoecetes bairdi 
Bristol Bay pooled 
100 
0.995 
— 
— 
0.005 
100 
1.000 
— 
- 
ND 
Bering Sea pooled 
283 
1.000 
- 
- 
— 
274 
0.998 
— 
0.002 
280 
1.000 
— 
— 
Port Moller 1990 
42 
1.000 
— 
— 
— 
42 
1.000 
— 
— 
42 
1.000 
— 
— 
Sand Pt/Pavlof 1990 
37 
1.000 
— 
— 
— 
47 
1.000 
— 
— 
ND 
Kodiak N. 1990 
48 
1.000 
— 
— 
— 
48 
0.990 
0.010 
— 
38 
1.000 
— 
— 
Kodiak S. 1990 
43 
0.988 
— 
— 
0.012 
43 
0.988 
0.012 
— 
36 
1.000 
— 
— 
Kamishak 1990 
50 
0.990 
0.010 
— 
— 
50 
1.000 
— 
— 
50 
1.000 
— 
— 
Montague St. 1990 
42 
1.000 
— 
— 
— 
49 
1.000 
— 
— 
50 
1.000 
— 
— 
Kachemak Bay 1990 
50 
1.000 
— 
— 
— 
50 
0.990 
0.010 
— 
50 
1.000 
— 
— 
Prince Wm. Sd. 1990 
50 
1.000 
— 
— 
— 
50 
1.000 
— 
— 
50 
1.000 
— 
— 
Sullivan Is. 1993 
100 
1.000 
— 
— 
— 
100 
0.995 
0.005 
— 
100 
1.000 
— 
— 
Seymour C. pooled 
125 
1.000 
- 
— 
— 
123 
1.000 
- 
— 
125 
1.000 
- 
- 
Chionoecetes opilio 
Bering Sea pooled 
124 
0.992 
— 
0.004 
0.004 
123 
1.000 
— 
— 
115 
0.991 
0.009 
— 
St. Matt. Is. pooled 
192 
0.992 
— 
— 
0.008 
193 
0.987 
0.005 
0.008 
200 
1.000 
— 
— 
Pribilof Is. pooled 
211 
0.991 
0.005 
— 
0.005 
193 
0.995 
0.003 
0.003 
214 
0.993 
0.002 
0.005 
Atlantic 0. 1991 
97 
1.000 
- 
— 
- 
97 
0.995 
0.005 
- 
97 
1.000 
- 
— 
AH-3* 
ALAT* 
CBYR* 
G3PDH-1 
* 
G3PDH-2* 2 
Population' 
n 
*100 
*94 
*91 
*106 
n 
*100 
*87 
n 
*100 
*117 
n 
*100 
*117 
n 
*100 
*86 
*111 
Chionoecetes bairdi 
Bristol Bay pooled 
100 
0.005 
0.995 
— 
— 
100 
1.000 
— 
100 
1.000 
— 
96 
0.974 
0.026 
100 
1.000 
— 
— 
Bering Sea pooled 
279 
0.014 
0.982 
0.004 
— 
283 
0.998 
0.002 
285 
0.998 
0.002 
265 
0.958 
0.042 
196 
0.949 
0.008 
0.043 
Port Moller 1990 
42 
— 
1.000 
— 
— 
42 
1.000 
— 
42 
1.000 
— 
41 
0.976 
0.024 
20 
0.950 
0.025 
0.025 
Sand Pt/Pavlof 1990 
3 
— 
1.000 
— 
— 
ND 
50 
1.000 
— 
1 
1.000 
— 
ND 
Kodiak N. 1990 
38 
0.013 
0.987 
— 
— 
50 
1.000 
— 
50 
1.000 
— 
46 
0.967 
0.033 
50 
0,990 
— 
0.010 
Kodiak S. 1990 
33 
0.015 
0.985 
— 
— 
50 
1.000 
— 
50 
1.000 
— 
37 
0.946 
0.054 
42 
1.000 
— 
— 
Kamishak 1990 
50 
— 
1.000 
— 
— 
50 
1.000 
— 
50 
1.000 
— 
49 
0.990 
0.010 
50 
1.000 
— 
— 
Montague St. 1990 
49 
— 
1.000 
— 
— 
49 
1.000 
— 
50 
1.000 
— 
50 
0.970 
0.030 
31 
1.000 
— 
— 
Kachemak Bay 1990 
50 
— 
1.000 
— 
— 
50 
1.000 
— 
50 
1.000 
— 
50 
0.950 
0.050 
50 
0.970 
— 
0.030 
Prince Wm. Sd. 1990 
50 
— 
0.990 
0.010 
— 
50 
1.000 
— 
50 
1.000 
— 
50 
0.970 
0.030 
47 
1.000 
— 
— 
Sullivan Is. 1993 
95 
0.011 
0.979 
0.011 
— 
97 
1.000 
— 
50 
1.000 
— 
89 
0.933 
0.067 
49 
0.980 
— 
0.020 
Seymour C. pooled 
122 
0.004 
0.992 
0.004 
— 
125 
1.000 
- 
100 
1.000 
- 
122 
0.959 
0.041 
109 
1.000 
- 
- 
Chionoecetes opilio 
Bering Sea pooled 
124 
0.923 
0.077 
— 
— 
123 
1.000 
— 
125 
0.996 
0.004 
125 
0.988 
0.012 
96 
0.995 
— 
0.005 
St. Matt. Is. pooled 
197 
0.939 
0.058 
— 
0.003 
195 
1.000 
— 
200 
1.000 
— 
198 
0.990 
0.010 
174 
0.994 
— 
0.006 
Pribilof Is. pooled 
213 
0.937 
0.063 
— 
— 
214 
1.000 
— 
214 
1.000 
— 
214 
0.998 
0.002 
183 
0.992 
0.003 
0.005 
Atlantic 0. 1991 
95 
0.937 
0.063 
- 
- 
97 
1.000 
- 
97 
1.000 
- 
97 
1.000 
- 
94 
1.000 
- 
- 
continued 
pies were from single panmictic populations. Average 
observed heterozygosities ranged from 0.016 to 0.035. 
Asnong-population variation 
Various measures indicated a low level of population 
differentiation. F ST values were low, however two loci, 
G3PDH-2* and PEPA* with respective F gT values of 
0.0137 (P=0.0005) and 0.0154 (P=0.0020), and the 
overall F gT value of 0.0046 for 15 polymorphic loci 
(P-0.0295) differed significantly from zero. A com- 
parison of all C. bairdi populations with a hierarchi- 
cal log-likelihood analysis, indicated significant het- 
erogeneity at four loci, G3PDH-2*, IDHP-1*, PEPA*, 
and PROT-3*; however the overall statistic was not 
significant (Table 4). In contrast, when populations 
