Figure 2 | Scientific Reports

Figure 2

From: The evolutionary consequences for seawater performance and its hormonal control when anadromous Atlantic salmon become landlocked

Figure 2

Plasma ACTH (a), cortisol (b), GH (c), IGF-I (d), thyroxine (T4; e) and triiodothyronine (T3; f) levels in juvenile anadromous and landlocked Atlantic salmon in freshwater. Values are mean ± standard error of 10–12 individuals. For plasma cortisol, ACTH and GH levels there was a significant effect of time (p < 0.0001), strain (p < 0.0001) and a significant interaction (p < 0.02). For plasma IGF-I and T4 levels there was a significant effect of time (p < 0.0001), no effect of strain (p > 0.8) but a significant interaction (p < 0.026). For plasma T3 there was a significant effect of time (p < 0.0001) and strain (p = 0.005) and no significant interaction (p = 0.15). Asterisk indicates significant difference from the landlocked strain at the same time period (p < 0.05, Neuman-Keuls test).

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