Stock and recruitment data for White Shrimp off the coast of Georgia (USA), 1979-2000.

White Shrimp (Litopenaeus setiferus) stock and recruitment data from off the coast of Georgia (USA), 1979-2000.

Format

A data frame with 22 observations on the following 3 variables:

year: Year of data
stock: Spawning stock index -- CPUE in June assessment surveys
recruits: Recuit index -- commercial landings in pounds from Aug-Jan
yrconf: A code of confidence for whether or not the stock value is known to come from the year shown (see the note)

Source

From (approximately) Figures 2 and 3 of Belcher, C.N., and C.A. Jennings. 2004. Evaluation of stock-recruitment curves for white shrimp in Georgia. North American Journal of Fisheries Management 24:654-661. CSV file

Note

No graph was shown for stock values vs. year so some stock values had to be haphazardly paired with recruit values -- especially for stock values between 2.5 and 3.0.

Topic(s)

Stock-Recruit
Recruitment

Examples

data(WShrimpGA)
str(WShrimpGA)
#> 'data.frame':	22 obs. of  4 variables:
#>  $ year    : int  1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 ...
#>  $ recruits: num  4.45 NA 2.5 NA 2.55 0.8 3.35 3.25 2.8 2.75 ...
#>  $ stock   : num  1 NA 1.8 NA 0.3 2.3 0.5 2.9 2.2 4.8 ...
#>  $ yrconf  : Factor w/ 2 levels "N","Y": 2 NA 1 NA 1 2 2 2 1 1 ...
head(WShrimpGA)
#>   year recruits stock yrconf
#> 1 1979     4.45   1.0      Y
#> 2 1980       NA    NA   <NA>
#> 3 1981     2.50   1.8      N
#> 4 1982       NA    NA   <NA>
#> 5 1983     2.55   0.3      N
#> 6 1984     0.80   2.3      Y
op <- par(mfrow=c(1,2),pch=19)
plot(recruits~year,data=WShrimpGA,type="b")
plot(recruits~stock,data=WShrimpGA)

par(op)