Figure 8.
Growth reaction norms across treatments, experiment II. Mean weight (log10) norm of reaction across all treatments for salmon of farmed, hybrid and wild origin. Replicated tanks are pooled. Error bars show the range of the family means within each experimental group. The elevations of the reaction norms were significantly different between the treatments, as well as between the farmed, hybrid and wild salmon. Wild salmon displayed a significantly flatter negative reaction norm slope between the hatchery control and the restricted hatchery treatments than the hybrid and farmed salmon, which displayed similar and steeper slopes. All groups displayed significantly different reaction norm slopes between the hatchery control and the restricted semi-natural treatment, with farmed salmon displaying the steepest slope, followed by the hybrid salmon. Salmon of all origin displayed similar positive reaction norm slopes between the restricted hatchery treatment and the restricted semi-natural treatment.