Pacific Salmon Color
Skin color sockeye and kokanee morphs of the Pacific salmon (Oncorhynchus nerka) raised in a low carotenoid environment.
A data frame with 35 observations on the following 2 variables.
a factor with levels kokanee and
sockeye
a numeric vector
Craig, J.K. and C. Foote. 2001. Countergradient variation and secondary sexual color: phenotypic convergence promotes genetic divergence in carotenoid use between sympatric anadromous and nonanadromous morphs of sockeye salmon (Oncorhynchus nerka). Evolution 55: 380-391.
SalmonColor histogram(~ skin.color | species, SalmonColor) bwplot(skin.color ~ species, SalmonColor)
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