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Explanatory variables of skipped spawning. Relative liver size [(hepatosomatic index, HSI) = 100 × liver weight × (total weight − gonad weight)−1] in different months for developing (pink) and nondeveloping (gray) females, 2006–2007 (A) and 2007–2008 (B). Error bars represent the SE. (C) HSI values of skippers (blue) and immatures (green) in February–March 2008, with calculated probability lines of being a skipper fitted for P values from 0.1 to 0.9 (n = 280).
