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
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)