Pacific Salmon Color

Skin color sockeye and kokanee morphs of the Pacific salmon (Oncorhynchus nerka) raised in a low carotenoid environment.

Usage

SalmonColor

Format

A data frame with 35 observations on the following 2 variables.

species

a factor with levels kokanee and sockeye

skin.color

a numeric vector

Source

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.

Examples

SalmonColor
#>    species skin.color
#> 1  kokanee       1.11
#> 2  kokanee       1.34
#> 3  kokanee       1.55
#> 4  kokanee       1.53
#> 5  kokanee       1.50
#> 6  kokanee       1.71
#> 7  kokanee       1.87
#> 8  kokanee       1.86
#> 9  kokanee       1.82
#> 10 kokanee       2.01
#> 11 kokanee       1.95
#> 12 kokanee       2.01
#> 13 kokanee       1.66
#> 14 kokanee       1.49
#> 15 kokanee       1.59
#> 16 kokanee       1.69
#> 17 kokanee       1.80
#> 18 kokanee       2.00
#> 19 kokanee       2.30
#> 20 sockeye       0.98
#> 21 sockeye       0.88
#> 22 sockeye       0.97
#> 23 sockeye       0.99
#> 24 sockeye       1.02
#> 25 sockeye       1.03
#> 26 sockeye       0.99
#> 27 sockeye       0.97
#> 28 sockeye       0.98
#> 29 sockeye       1.03
#> 30 sockeye       1.08
#> 31 sockeye       1.15
#> 32 sockeye       0.90
#> 33 sockeye       0.95
#> 34 sockeye       0.94
#> 35 sockeye       0.99
histogram(~ skin.color | species, SalmonColor)

bwplot(skin.color ~ species, SalmonColor)