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Relative reproductive success (RRS) of each F1 mating type in the wild, relative to W × W or W × – (RRS = 1.0, by definition). ‘–’ equals unknown/unassigned parent. (a) Female F1s, (b) male F1s. Weighted geometric mean RRS among return years 2003–2005 is plotted for H × W and H × H relative to W × W on the left panels, and for H × – relative to W × – on the right panels. Error bar represents 1 SD.
