Ages (subsample) and lengths (all fish) of Jonubi.

Ages (subsample) and lengths (all fish) for Jonubi (Chalcalburnus mossulensis).

Format

A data frame with 410 observations on the following 2 variables.

fl: Fork length (cm) measurements
age: Assigned ages (years)

Source

Details

A total of 50 fish dispersed proportionately over 1-cm fork length intervals from the Jonubi1 data frame was obtained for age assignment. The remaining fish in the file were only measured for length (i.e., the ages were deleted). This data file can be used to demonstrate the use of age-length keys.

Topic(s)

Age-Length Key

Examples

data(Jonubi2)
str(Jonubi2)
#> 'data.frame':	410 obs. of  2 variables:
#>  $ fl : int  12 14 15 12 12 10 12 12 13 11 ...
#>  $ age: int  3 3 4 3 3 3 3 3 3 2 ...
head(Jonubi2)
#>   fl age
#> 1 12   3
#> 2 14   3
#> 3 15   4
#> 4 12   3
#> 5 12   3
#> 6 10   3
plot(fl~age,data=Jonubi2)