salmon {idr}

Salmon data

Description

This data is from Simonoff (1990, p 161). It concerns the size of the annual spawning stock and its production of new catchable-sized fish for 1940 through 1967 for the Skeena river sockeye salmon stock (in thousands of fish). It has three columns, year, spawners and recruits. It was speculated to consist of two different populations.

Usage

data(salmon)

Format

A data frame with 28 observations on the following 3 variables.

year

a numeric vector of the year

spawners

a numeric vector of the annual spawning stock

recruits

a numeric vector of the production of new catchable-sized fish

Source

Data is salmon.dat in Simonoff (1990). It can be downloaded from the book's website.

References

Simonoff, J. S. (1990), Smoothing Methods in Statistics, New York: Spinger-Verlag.

Examples

data(salmon)
plot(rank(salmon$spawners), rank(salmon$recruits))