Stock and recruitment data for Barndoor Skate from Georges Bank, 1966-2007.
Stock and recruitment data for Barndoor Skate (Dipturus laevis) from Georges Bank for three seasons.
A data frame with 31 observations on the following 4 variables.
a numeric vector giving CPUE of spawning fish
a numeric vector containing the CPUE of recruits
a numeric vector containing the year of the survey (recruits have been properly lagged (3 years) to match with spawners)
a factor containing the season of capture (fall, spring, winter)
Stock-Recruit
Recruitment
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.
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.
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)
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