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Fig. 9. Changes in plasma levels of testosterone (T), 11-ketotestosterone (11KT),
estradiol (E2) and 17
-20β-dihydroxy-4-pregnen-3-one (DHP) during
upstream migration in 2002. Pre-spawning and mature adults were collected
along their homing pathway from the coast to the hatchery, as shown in
Fig. 1B. Fish at or near the
hatchery almost completed final maturation, so that they were considered as
mature adults. Furthermore, data are compared with those from maturing adult I
in the Bering Sea. Date of sampling and the number of fish are shown in
Table 4. Value are means
± s.e.m. Significant differences among sampling points are identified
with different letters (P<0.05 one-way ANOVA and Tukey's test).
Asterisks indicate significant difference (P<0.05) when compared
with the maturing adult 1 in the central Bering Sea.
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