FSAdata (version 0.4.1)

LakeTroutMI: Stock and recruitment data for Lake Trout in Lake Superior, 1971-1991.

Description

Stock and recruitment data for the 1971-1991 year-classes of Lake Trout (Salvelinus namaycush) in Michigan waters of Lake Superior.

Format

A data frame of 105 observations on the following 5 variables:

year

Year of data

recruits

Recuit index -- geometric mean number of age-7 fish/km/net-night

wild

Wild fish spawning stock index -- geometric mean number of wild age-8 and older fish/km/net-night

stocked

Stocked fish spawning stock index -- geometric mean number of stocked age-8 and older fish/km/net-night

area

Lake Superior management unit

Topic(s)

• Stock-Recruit

• Recruitment

Examples

data(LakeTroutMI)
LakeTroutMI$stock <- LakeTroutMI$wild+LakeTroutMI$stocked
str(LakeTroutMI)
head(LakeTroutMI)
op <- par(mfrow=c(3,2),pch=19)
plot(recruits~year,data=LakeTroutMI,subset=area=="MI3",type="l",ylim=c(0,max(recruits,na.rm=TRUE)))
lines(recruits~year,data=LakeTroutMI,subset=area=="MI4",col="blue")
lines(recruits~year,data=LakeTroutMI,subset=area=="MI5",col="green")
lines(recruits~year,data=LakeTroutMI,subset=area=="MI6",col="red")
lines(recruits~year,data=LakeTroutMI,subset=area=="MI7",col="yellow")
plot(recruits~stock,data=LakeTroutMI,subset=area=="MI3",main="MI3")
plot(recruits~stock,data=LakeTroutMI,subset=area=="MI4",col="blue",main="MI4")
plot(recruits~stock,data=LakeTroutMI,subset=area=="MI5",col="green",main="MI5")
plot(recruits~stock,data=LakeTroutMI,subset=area=="MI6",col="red",main="MI6")
plot(recruits~stock,data=LakeTroutMI,subset=area=="MI7",col="yellow",main="MI7")
par(op)