Additional file 4.

Phenotypic distributions between approximately one- and two-year-old fish used in current study. The boxplot of phenotypic distributions were compared between approximately one- and two-year-old F2 fish. The increased VAB levels in two-year-old fish (top) was not associated with the increases of EO (middle; no significant difference: n.s.; The Mann-Whitney non-parametric test was applied since phenotypic values were not normally distributed), or SO-3 SN number (bottom; significantly decreased in two-year-old fish). N were indicated in the boxes.

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Yoshizawa et al. BMC Biology 2012 10:108   doi:10.1186/1741-7007-10-108