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Table 3.

Specific growth rates and final condition factors of dominant and subordinate rainbow trout Oncorhynchus mykiss from cortisol and cortisol+RU486 treatment groups confined in size-matched pairs for 5 days

TreatmentSocial statusSGR (% growth/day)CFf(100×g cm-3)
Cortisol Dominant 0.25±0.12a (14) 1.09±0.03 (14) 
 Subordinate -1.16±0.19b (14) 0.99±0.03 (14) 
Cortisol+RU486 Dominant -0.58±0.13b (10) 1.04±0.03 (10) 
 Subordinate -1.01±0.13b (10) 1.05±0.04 (10) 
TreatmentSocial statusSGR (% growth/day)CFf(100×g cm-3)
Cortisol Dominant 0.25±0.12a (14) 1.09±0.03 (14) 
 Subordinate -1.16±0.19b (14) 0.99±0.03 (14) 
Cortisol+RU486 Dominant -0.58±0.13b (10) 1.04±0.03 (10) 
 Subordinate -1.01±0.13b (10) 1.05±0.04 (10) 

SGR, specific growth rate; CFf, final condition factor.

Values are means ± 1 s.e.m. (N). For SGR, groups that do not share a letter are significantly different from one another(two-way ANOVA with treatment group and social status as factors, P=0.036 for treatment group, P<0.001 for social status,and P=0.003 for interactions between these two factors); there were no significant effects of treatment group or social status on CFf(two-way ANOVA, P=0.937 for treatment group, P=0.141 for social status, and P=0.088 for interactions).

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