Stock and recruitment data for Lake Trout in Lake Superior, 1971-1991.
Stock and recruitment data for the 1971-1991 year-classes of Lake Trout (Salvelinus namaycush) in Michigan waters of Lake Superior.
A data frame of 105 observations on the following 5 variables:
Year of data
Recuit index – geometric mean number of age-7 fish/km/net-night
Wild fish spawning stock index – geometric mean number of wild age-8 and older fish/km/net-night
Stocked fish spawning stock index – geometric mean number of stocked age-8 and older fish/km/net-night
Lake Superior management unit
Stock-Recruit
Recruitment
From (approximately) figures in Richards, J.M., M.J. Hansen, C.R. Bronte, and S.P. Sitar. 2004. Recruitment dynamics of the 1971-1991 year-classes of Lake Trout in Michigan waters of Lake Superior. North American Journal of Fisheries Management. 24:475-489.
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)
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