Ages, lengths, and sexes of Troutperch.

The assigned ages (by scales), total lengths (mm), and sexes of Troutperch (Percopsis omsicomaycus) captured in southeastern Lake Michigan.

Format

A data frame with 431 observations on the following 3 variables:

age

Assigned ages (by scales).

tl

Measured total length (mm).

sex

Sex (f=female and m=male).

Source

Simulated from the age-length data provided in Table 1 of House, R., and L. Wells. 1973. Age, growth, spawning season, and fecundity of the trout-perch (Percopsis omsicomaycus) in southeastern Lake Michigan. Journal of the Fisheries Research Board of Canada 30:1221-1225. CSV file

Topic(s)

• Growth

• von Bertalanffy

Examples

data(TroutperchLM1)
str(TroutperchLM1)
#> 'data.frame':	431 obs. of  3 variables:
#>  $ age: int  1 1 1 1 1 1 1 1 1 1 ...
#>  $ tl : int  48 50 51 52 56 56 55 56 56 57 ...
#>  $ sex: Factor w/ 2 levels "f","m": 2 2 2 2 2 2 2 2 2 2 ...
head(TroutperchLM1)
#>   age tl sex
#> 1   1 48   m
#> 2   1 50   m
#> 3   1 51   m
#> 4   1 52   m
#> 5   1 56   m
#> 6   1 56   m
op <- par(mfrow=c(1,2),pch=19)
plot(tl~age,data=TroutperchLM1,subset=sex=="f",main="female")
plot(tl~age,data=TroutperchLM1,subset=sex=="m",main="male")

par(op)