Duffy-Anderson et al.: Stage-specific vertical distribution of Pleuronectes quadrituberculatus eggs 
167 
A 
o-io 
10-20 
20-30 
30-40 
40-50 
50-60 
B 0 1 2 3 
0-10 
E 10-20 
.1 20-30 
| 30-40 
§ 40-50 
50-60 
^ 0 1 2 3 
0-10 
10-20 
20-30 
30-40 
40-50 
50-60 
0 5 10 15 20 25 
2003 
X 
2005 
2003 
D 
2005 
Mean abundance (catch per 1000 m 3 ) 
Mean abundance (catch per 1000 m 3 ) 
Figure 3 
Mean abundance (± standard deviation) of Alaska plaice < Pleuronectes quadrituberculatus ) eggs by developmental stage 
and depth. The symbol X indicates that no sample was taken at that depth. Data are derived from catches with the mul- 
tiple opening and closing net and environmental sampling system in 2003 and 2005. (A) Early stage, (B) middle stage, 
(C) early-late stage, (D) middle-late stage, (E) late-late stage. 
Table 3 
Statistical comparisons Off differences in abundances of Alaska plaice ( Pleuronectes quadrituberculatus) eggs in 
by depth bin. Significance is noted at P<0.05. ns=not significant. ML=middle late stage. LL=late late stage. 
2003 and 2005 
ML 2003 
0—10 m 
10-20 m 
20—30 m 
30-40 m 
40-50 m 
50-60 m 
60+ m 
0-10 m 
ns 
10-20 m 
0.004 
ns 
20—30 m 
<0.001 
ns 
ns 
30-40 m 
0.035 
ns 
ns 
ns 
40-50 m 
0.001 
ns 
ns 
ns 
ns 
50-60 m 
ns 
ns 
ns 
ns 
ns 
ns 
60+ m 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
continued 
