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)

• Stock-Recruit
• Recruitment

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)