yellowfin: Yellow fin tuna catch rate in Tropical Indian Ocean

In jverzani/UsingR: Data Sets, Etc. for the Text "Using R for Introductory Statistics", Second Edition

Description

Mean catch rate of yellow fin tuna in Tropical Indian Ocean for the given years.

Usage

data(yellowfin)

Format

A data frame with 49 observations on the following 2 variables.

year

The year

count

Mean number of fish per 100 hooks cast

Details

Estimates for the mean number of fish caught per 100 hooks are given for a number of years. This can be used to give an estimate for the size, or biomass, of the species during these years assuming the more abundant the fish, the larger the mean. In practice this assumption is viewed with a wide range of attitudes.

Source

This data is read from a graph that accompanies Myers RA, Worm B (2003) “Rapid worldwide depletion of predatory fish communities”. Nature 423:280-283.

References

See also http://www.soest.hawaii.edu/PFRP/large_pelagic_predators.html for rebuttals to the Myers and Worm article.

Examples

data(yellowfin)
plot(yellowfin)

jverzani/UsingR documentation built on Aug. 3, 2020, 11:57 a.m.