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Fig. 1. The effects of cortisol and cortisol+RU486 treatments (single dose
injections) on the behaviour scores of (A) size-matched (respectively, 14 and
10 pairs) and (B) size-mismatched (respectively, 14 and 10 pairs) pairs of
rainbow trout Oncorhynchus mykiss confined together for 5 days.
Values are means ± 1 S.E.M.;
N values are given in the figure. Means were calculated for each
combination of social status and treatment within a treatment group to give
dominant treated, subordinate treated, dominant untreated, and subordinate
untreated categories. There was no significant effect of treatment group on
behaviour score within a category (Student's t-test,
P>0.05).
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