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Assigned ages, measured fork lengths, and observed sexes for European Perch (Perca fluviatilis) from Lake Tjuekemeer (The Netherlands).

Format

A data frame of 69 observations on the following 3 variables:

fl

Fork lengths (cm).

age

Assigned ages.

sex

Sex (female, male).

Source

From (approximately) Figure 2 in Mooij, W.M., J.M. Van Rooij, and S. Wijnhoven. 1999. Analysis and comparison of fish growth from small samples of length-at-age data: Detection of sexual dimorphism in Eurasian perch as an example. Transactions of the American Fisheries Society, 128:483-490. CSV file

Topic(s)

  • Growth

  • fon Bertalanffy

Examples

data(EuroPerchTJ)
str(EuroPerchTJ)
#> 'data.frame':	69 obs. of  3 variables:
#>  $ age: int  2 2 2 2 2 2 2 2 2 2 ...
#>  $ fl : num  19.8 20.2 20.5 20.9 21.3 21.7 22.1 22.6 23 23.2 ...
#>  $ sex: Factor w/ 2 levels "female","male": 2 2 2 2 2 2 2 2 2 2 ...
head(EuroPerchTJ)
#>   age   fl  sex
#> 1   2 19.8 male
#> 2   2 20.2 male
#> 3   2 20.5 male
#> 4   2 20.9 male
#> 5   2 21.3 male
#> 6   2 21.7 male
op <- par(mfrow=c(1,2),pch=19)
plot(fl~age,data=EuroPerchTJ,subset=sex=="female",main="Female")
plot(fl~age,data=EuroPerchTJ,subset=sex=="male",main="Male")

par(op)