| Summary: | (A) Dependence of proportion of M . trossulus ( Ptros ) on proportion of T-morphotypes ( PT ). Dotted lines are empirical regressions (Model 4). Solid gray lines–predictions of “ Ptros by PT calculator” ( Eq 3 ). Solid black lines represent Y = X dependence. (B) Probability to find a mussel with a T-morphotype among M . edulis ( P(T|edu) ) (empty points), and M . trossulus ( P(T|tros) ) (filled points) as a function of Ptros . Lines are empirical regressions (Model 5). (C) Probability of correct species identification by the morphotype test: M . trossulus by T-morphotype, P(tros|T) (filled points) and M . edulis by E-morphotype, P(edu|E) (empty points) as a function of Ptros . Dotted lines are empirical regressions (Model 6). Sold lines–predictions of “genotype by morphotype calculator” for M . trossulus ( Eq 1 , red line) and M . edulis ( Eq 2 , blue line). On each graph, dots represent the observed proportions in samples, and shaded areas around regression lines– 95% CI of regressions.
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