Figure 1From: Identifying environmental variables explaining genotype-by-environment interaction for body weight of rainbow trout (Onchorynchus mykiss): reaction norm and factor analytic modelsDay length profiles in four experimental environments. The x-axis represents the rearing period in two-month intervals (month-year); each observation represents the average day length during a two-week interval; the rearing period differed across environments: NUC = breeding environment, FI = Freshwater Institute, PE = Peru and GE = Germany.Back to article page