Figure 2
Overview of the experimental design, experiment II. The experimental period lasted for 20 weeks. The 750 individuals sampled from each of the hatchery control treatment replicates (tank 1 and 2) were randomly selected, while all surviving individuals were sampled from the restricted hatchery treatment (tank 3 and 4) and the restricted semi-natural treatment (tank 5 and 6). Out of the 5620 initial individuals in the restricted hatchery treatment and the restricted semi-natural treatment, 5568 were included as dead or alive in the survival analysis. Hence, 52 individuals (0.8 individual/family in tank 2 and 1 individual/family in tank 3) were excluded to control for the unbalanced design and the few surviving individuals that were not unambiguously assigned to a single family in the restricted hatchery treatment. Out of the 3687 individuals genotyped, 34 individuals were removed due to unsuccessful family assignment, growth malformations or sampling errors, leaving the total data set for growth comparison consisting of 2236 individuals.