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Stock and recruitment data for Hake (Merluccius merluccius), 1982-1996.

Format

A data frame with 15 observations on the following 3 variables.

year

a numeric vector of years 1982-1996

recruits

a numeric vector of the number of recruits in millions

spawn.biomass

a numeric vector of spawning biomass in thousand tonnes

Source

Cadima, E. 2003. Fish Stock Assessment Manual, FAO Fisheries Department. 131 pp. CSV file

Topic(s)

  • Stock-Recruit

  • Recruitment

Examples

data(Hake)
str(Hake)
#> 'data.frame':	15 obs. of  3 variables:
#>  $ year         : int  1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 ...
#>  $ recruits     : int  125 107 136 97 104 97 84 56 59 69 ...
#>  $ spawn.biomass: num  59.8 61.4 58.8 44.1 26.4 24.2 22.8 18.9 19.4 20.5 ...
head(Hake)
#>   year recruits spawn.biomass
#> 1 1982      125          59.8
#> 2 1983      107          61.4
#> 3 1984      136          58.8
#> 4 1985       97          44.1
#> 5 1986      104          26.4
#> 6 1987       97          24.2
op <- par(mfrow=c(1,2),pch=19)
plot(recruits~year,data=Hake,type="l")
plot(recruits~spawn.biomass,data=Hake)

par(op)