Ages, lengths, and sexes of Atlantic Croaker by sex.

Assigned ages (by otoliths), total lengths, and sexes of Atlantic Croaker (Micropogonias undulatus).

Format

A data frame of 318 observations on the following 3 variables:

age: Otolith age-at-capture (years).
tl: Total length (nearest mm) at capture.
sex: Sex of the fish (M=male and F=female).

Source

From Figure 4 in Chapter 1 (Atlantic Croaker) of the VMRC Final Report on Finfish Ageing, 1999 by the Center for Quantitative Fisheries Ecology at Old Dominion University. CSV file

Topic(s)

Growth
von Bertalanffy

Examples

data(Croaker2)
str(Croaker2)
#> 'data.frame':	318 obs. of  3 variables:
#>  $ age: int  1 1 1 2 2 2 2 2 2 2 ...
#>  $ tl : int  243 247 248 330 320 285 280 265 260 248 ...
#>  $ sex: Factor w/ 2 levels "F","M": 1 1 2 1 1 1 1 1 1 1 ...
head(Croaker2)
#>   age  tl sex
#> 1   1 243   F
#> 2   1 247   F
#> 3   1 248   M
#> 4   2 330   F
#> 5   2 320   F
#> 6   2 285   F
op <- par(mfrow=c(1,2),pch=19)
plot(tl~age,data=Croaker2,subset=sex=="F",main="Female")
plot(tl~age,data=Croaker2,subset=sex=="M",main="Male")

par(op)