Fig. 4From: The origin of the parrotfish species Scarus compressus in the Tropical Eastern Pacific: region-wide hybridization between ancient species pairsThe distribution of hybrid indexes for the three different hybrid zones (rows) and among the three localities (columns). Hybrid indexes are = Q-values from a STRUCTURE, K = 2 model representing each cross. Individuals within each bar are colour coded by phenotypeBack to article page