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Greater Lizardfish (Saurida tumbil) stock and recruitment by year, 1955-1964.

Format

A data frame of 10 observations on the following 6 variables:

year

Year of data

stock

Spawning stock (in ten thousands)

recruits

Recruits (in hundred thousands)

Source

Visually estimated from Figure 7.12 (p. 267) of Hilborn, R. and C.J. Walters. 1992. Quantitative Fisheries Stock Assessment: Choice, Dynamics, and Uncertainty. Chapman and Hall, New York. 570 p. CSV file

Topic(s)

  • Stock-Recruit

  • Recruitment

Examples

data(Lizardfish)
str(Lizardfish)
#> 'data.frame':	10 obs. of  3 variables:
#>  $ year    : int  1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
#>  $ stock   : num  1.5 1.3 NA 0.6 0.8 0.75 0.5 0.45 0.3 0.25
#>  $ recruits: num  2.75 3.7 NA 2.6 2.4 1.7 1.3 1.25 1.7 1.65
head(Lizardfish)
#>   year stock recruits
#> 1 1955  1.50     2.75
#> 2 1956  1.30     3.70
#> 3 1957    NA       NA
#> 4 1958  0.60     2.60
#> 5 1959  0.80     2.40
#> 6 1960  0.75     1.70
op <- par(mfrow=c(1,2))
plot(recruits~year,data=Lizardfish,type="l")
plot(recruits~stock,data=Lizardfish)

par(op)