synlik (version 0.1.7)

bf: Nicholson's 1954 blowfly data

Description

Data from figures 3 and 4 of Nicholson, 1954.

Usage

data(bf1)

Value

matrix of replicate data series

Arguments

bf1

the dataset name

Author

Simon N. Wood, maintainer Matteo Fasiolo <matteo.fasiolo@@gmail.com>

Details

bf1 is Nisbet and Gurney's run 1, and Nicholson's (1954) figure 3 (adult food limitation). The data are actually from the global population dynamics database at Silwood. They are daily: Nicholson's figure 3 plots data every other day, but the text says that measurements were taken daily. However elsewhere they are reported every other day. Probably best to assume that they have been interpolated to daily.

bf2 and bf3 are digitized from Nicholson's (1954) figure 4. bf2 is the upper series: larval food limitation, with 50g per day of larval food provided. bf3 is the lower series: same set up, half as much food. These are Nisbet and Gurney's runs 2 and 3, respectively.

References

Alexander J Nicholson. An outline of the dynamics of animal populations. Australian Journal of Zoology, 2(1):9--65, 1954.

See Also

blowfly

Examples

  library(synlik)
  data(bf1)
  data(bf2)
  data(bf3)
  par(mfrow=c(3,1),mar=c(4,4,1,1))
  with(bf1,plot(day,pop,type="l"))
  with(bf1,points(day,pop,pch=20,cex=.8))
  abline(mean(bf1$pop),0,col=2); abline(median(bf1$pop),0,col=3);
  with(bf2,plot(day,pop,type="l"))
  with(bf2,points(day,pop,pch=20,cex=.8))
  abline(mean(bf2$pop),0,col=2); abline(median(bf2$pop),0,col=3);
  with(bf3,plot(day,pop,type="l"))
  with(bf3,points(day,pop,pch=20,cex=.8))
  abline(mean(bf3$pop),0,col=2); abline(median(bf3$pop),0,col=3);