PikeWindermere: Stock and recruitment data for Northern Pike from Lake...

Description Format Topic(s) Note Source Examples

Description

Stock and recruitment data for Northern Pike (Esox lucius) from Lake Windermere, 1944-1981.

Format

A data frame of 75 observations on the following two variables:

year

Year

stock

Female biomass (kg)

recruits

Number at age-2

basin

Basin of Windermere (North or South)

tdd14

Temperature degree-days over 14C

Topic(s)

Note

Stock values were originally reported in 1000s of kgs and recruits were originally recorded in tens of numbers. Thus, plots look very discrete.

Source

From table 3 in Kipling, C. 1983. Changes in the population of pike (Esox lucius) in Windermere from 1944 to 1981. Journal of Animal Ecology 52:989-999.

Examples

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data(PikeWindermere)
str(PikeWindermere)
head(PikeWindermere)
op <- par(mfrow=c(2,2),pch=19)
plot(recruits~year,data=PikeWindermere,subset=basin=="North",main="North")
plot(recruits~stock,data=PikeWindermere,subset=basin=="North",main="North")
plot(recruits~year,data=PikeWindermere,subset=basin=="South",main="South")
plot(recruits~stock,data=PikeWindermere,subset=basin=="South",main="South")
par(op)

FSAdata documentation built on May 29, 2017, 11:07 p.m.