51 0 
Fishery Bulletin 96(3), 1998 
Table 6 (continued) 
Sample location 
Locus, 
sample size Umnak Seguam Kiska Attu 
and alleles Island Pass Island Island 
IDDH* 1 
Sample location 
Locus, 
sample size Umnak Seguam Kiska Attu 
and alleles Island Pass Island Island 
No. 
63 
*100 
0.984 
*165 
0.016 
*25 
0.000 
IDHP-1* 
No. 
100 
*100 
1.000 
*65 
0.000 
*140 
0.000 
MPI* 
*100 
0.971 
*110 
0.014 
*116 
0.014 
*90 
0.000 
PEPB-1* 1 2 3 
n 
74 
*100 
0.993 
*90 
0.007 
No. 
73 
*100 
0.562 
*110 
0.397 
*118 
0.007 
*90 
0.000 
*113 
0.034 
PEPD* 
No. 
63 
86 76 
0.948 0.954 
0.006 0.007 
0.041 0.039 
80 74 
1.000 0.988 
0.000 0.000 
0.000 0.000 
0.969 0.994 
0.020 0.006 
0.000 0.000 
0.010 0.000 
90 80 
0.994 1.000 
0.000 0.000 
99 80 
0.576 0.544 
0.394 0.387 
0.005 0.019 
0.005 0.000 
0.020 0.050 
93 80 
*100 
74 
*110 
0.973 
*120 
0.007 
*92 
0.020 
PGDH* 1 
No. 
*100 
0.980 
*80 
0.007 
*115 
0.014 
PGK-1* 1 
No. 
0.993 
*100 
0.007 
*71 
0.000 
*45 
0.000 
*15 
PGM* 1 
74 
No. 
0.993 
*100 
0.007 
*80 
74 
SOD * 
0.500 
No. 
0.439 
*100 
0.034 
*190 
0.007 
TPI* 
0.020 
No. 
*-100 
74 
*-500 
0.738 0.742 
0.222 0.226 
0.024 0.011 
0.016 0.022 
69 99 
0.819 0.818 
0.152 0.152 
0.022 0.030 
72 100 
0.785 0.765 
0.097 0.115 
0.097 0.090 
0.014 0.030 
74 99 
0.926 0.960 
0.074 0.040 
75 96 
0.993 0.964 
0.007 0.036 
74 100 
1.000 1.000 
0.000 0.000 
0.794 0.804 
0.175 0.182 
0.025 0.014 
0.006 0.000 
79 72 
0.816 0.771 
0.152 0.153 
0.032 0.076 
79 74 
0.829 0.770 
0.082 0.122 
0.082 0.101 
0.006 0.007 
80 74 
0.944 0.953 
0.050 0.047 
80 74 
0.981 0.993 
0.019 0.007 
80 74 
0.994 0.986 
0.006 0.014 
1 Variation at alleles not listed above where the frequency of the allele is < 0.010: G3PDH-2*90 and IDDH*40 in Seguam Pass; IDHP-1*90 and *50 
in Kiska Island; PEPB1*115 in Seguam Pass; PGDH*70 and PGK1*55 in Gulf of Alaska; and PGM*115 in Kiska Island. 
2 Variation at 8 loci not listed above where the frequency of the alternate allele is < 0.010: AH-1*118 in Attu Island; ENO*-180 in Seguam Pass; 
FH*77, and GPI-2*93 , and *105 in Kiska Island; IDHP-2*73 in Seguam Pass; LDH*155 in Attu Island; MDH-1*150 (n=100) and PK*-350 in 
Seguam Pass. 
3 A seventh allele (*110) could not be reliably distinguished from the *115 allele and therefore was pooled with the latter allele. 
used von Bertalanffy curve, and the length-weight 
data were fitted to an allometric length-weight rela- 
tionship. The F-tests on the growth curves deter- 
mined that there was significant variability in the 
data among areas that was explained by separate 
growth curves rather than a single growth curve for 
all areas combined. Although the Gulf of Alaska and 
eastern Aleutian Islands data sets were small, data 
fits to the separate von Bertalanffy models were good, 
and an F-test indicated that separate growth curves 
were appropriate. There were low numbers of fish 
greater than five years in the Gulf of Alaska; how- 
ever, the data set still allowed for fairly precise esti- 
mation of the asymptotic length (CV=0.02), the pa- 
rameter most likely to be affected by the lack of older 
ages. 
Morphological and meristic evidence and growth 
patterns suggest that Atka mackerel may have some 
Table 7 
Within-sample genetic variability over 37 loci. 
Location 
Average 
heterozygosity 
Percent of 
loci P 0 95 
Average 
number of 
alleles/locus 
Umnak Island 
0.135 
35.1 
2.2 
Seguam Pass 
0.142 
32.4 
2.4 
Kiska Island 
0.135 
35.1 
2.3 
Attu Island 
0.137 
32.4 
2.2 
degree of stock separation, at least by broad geo- 
graphic areas (the eastern Bering Sea, Aleutian Is- 
lands, and Gulf of Alaska 12,3 ; Lee, 1985; Kimura and 
Ronholt, 1988). The present study is the first genetic 
