Stickleback data {paleoTS}R Documentation

Stickleback data from Bell et al. (2006)

Description

Data of dorsal spine data from a fossil stickleback lineage.

Usage

data(dorsal.spines)

Format

a paleoTS object for the time-series of dorsal spine counts

Details

These data are already in the form of a paleoTS object, with sample means (mm), variances (vv) sample sizes (nn), and ages in Kyr (tt).

Source

Bell, M.A., M.P. Travis and D.M. Blouw 2006. Inferring natural selection in a fossil threespine stickleback. Paleobiology 32:562-577.

Examples

data(dorsal.spines)

# get subset of samples from invading lineage (tt>=4.5 Kyr), only those with nn>=5
ok<- dorsal.spines$tt >= 4.5 & dorsal.spines$nn >=5
ds2<- sub.paleoTS(dorsal.spines, ok=ok)

# convert time scale to generations (500 gen per Kyr)
ds2$tt<- ds2$tt*(1000/2)	
plot(ds2, pool=TRUE)

# compare URW (drift) and OU (adaptive) models
m.urw<- opt.joint.URW(ds2, pool=TRUE)
m.ou<- opt.joint.OU(ds2, pool=TRUE)
aw<- akaike.wts(c(m.urw$AICc, m.ou$AICc))
cat ("Akaike wts: ", round(aw, 3),"\t", "[URW, OU]", "\n")

[Package paleoTS version 0.3-1 Index]