Assigned age (by scales) and total length of Longjaw Cisco (Leucichthys alpenae) captured at two locations in Lake Michigan.

## Format

A data frame with 378 observations on the following 3 variables.

age

Assigned age (by scales).

tl

Measured total length (mm).

loc

Capture location (NE=northeast and S=south).

## Source

Simulated from age-length data provided in tables 2 and 3 of Jobes, F.W. 1946. The age, growth, and distribution of the longjaw cisco, Leucichthys alpenae Koelz, in Lake Michigan. Transactions of the American Fisheries Society 76:215-247. CSV file

## Topic(s)

• Growth

• von Bertalanffy

## Examples

data(LJCisco)
str(LJCisco)
#> 'data.frame':	378 obs. of  3 variables:
#>  $age: int 2 2 2 2 2 2 2 2 2 2 ... #>$ tl : int  208 210 227 223 233 237 232 234 234 231 ...
#>  \$ loc: Factor w/ 2 levels "NE","S": 1 1 1 1 1 1 1 1 1 1 ...
#>   age  tl loc
#> 1   2 208  NE
#> 2   2 210  NE
#> 3   2 227  NE
#> 4   2 223  NE
#> 5   2 233  NE
#> 6   2 237  NE
op <- par(mfrow=c(1,2))
plot(tl~age,data=LJCisco,subset=loc=="NE",main="northeast")
plot(tl~age,data=LJCisco,subset=loc=="S",main="south")

par(op)