Fig. 4From: Recent range expansion of an intermediate host for animal schistosome parasites in the Indo-Australian Archipelago: phylogeography of the freshwater gastropod Indoplanorbis exustus in South and Southeast AsiaObserved and expected mismatch distributions for the total population of the IAA. The observed distributions (black points and dotted line) are compared for their goodness-of-fit to a Poisson distribution under a model of sudden population expansion (a) and a model of spatial expansion (b)Back to article page