Fig. 4

STRUCTURE analysis of the Lisbon arched-mouth nase Iberochondrostoma olisiponense samples. (a) Bar plot of the posterior probability of the coefficient of membership, each vertical line represents an individual and colours represent the inferred ancestry from K populations. Results for K = 2 to K = 4 are shown; (b) Plot of the Log posterior probability (Ln(P), red line) and Evanno’s method (Delta K, black line) vs K.