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
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)