BSkateGB {FSAdata}R Documentation

Stock and recruitment data for Barndoor Skate from Georges Bank, 1966-2007.

Description

Stock and recruitment data for Barndoor Skate (Dipturus laevis) from Georges Bank for three seasons.

Format

A data frame with 31 observations on the following 4 variables.

spawners

a numeric vector giving CPUE of spawning fish

recruits

a numeric vector containing the CPUE of recruits

year

a numeric vector containing the year of the survey (recruits have been properly lagged (3 years) to match with spawners)

season

a factor containing the season of capture (fall, spring, winter)

Topic(s)

Note

Only years within each season where more than one spawner and more than one recruit were captured were recorded. The authors noted that the Beverton-Holt model could NOT be fit to the winter data.

Source

estimated (using digitize) from figures 4-6 in Gedamke, T., J.M. Hoenig, W.D. DuPaul, and J.A. Musick. 2009. Stock-recruitment dynamics and the maximum population growth rate of the barndoor skate on Georges Bank. North American Journal of Fisheries Management 29:512-526.

Examples

data(BSkateGB)
str(BSkateGB)
head(BSkateGB)
op <- par(mfrow=c(3,2),pch=19)
plot(recruits~year,data=BSkateGB,subset=season=="fall",type="b",main="fall")
plot(recruits~spawners,data=BSkateGB,subset=season=="fall",main="fall")
plot(recruits~year,data=BSkateGB,subset=season=="spring",type="b",main="spring")
plot(recruits~spawners,data=BSkateGB,subset=season=="spring",main="spring")
plot(recruits~year,data=BSkateGB,subset=season=="winter",type="b",main="winter")
plot(recruits~spawners,data=BSkateGB,subset=season=="winter",main="winter")
par(op)


[Package FSAdata version 0.3.7 Index]