Ages and lengths of Longjaw Cisco from two locations in Lake Michigan.

Description

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).

Topic(s)

• Growth
• von Bertalanffy

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.

Examples

data(LJCisco)
str(LJCisco)
head(LJCisco)
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)