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Genetic divergence in Atlantic salmon (Salmo salar) from streams with low (blue, n = 5) vs. high (green, n = 5) parental nutrients. Plotted are raw estimates for (a) the number of surviving families and (b) the variance in family level survival for individual streams (unfilled circles) and the mean (filled circles; ± 1 SE) across streams within the low vs. high nutrient treatments.
