Ages and lengths of Channel Darters from two locations.

Description

Assigned ages (from otoliths), total length, and collection location of Channel Darter (Percina copelandi).

Format

A data frame of 54 observations on the following 3 variables:

• age: Otolith age-at-capture (years).

• tl: Total length (nearest 0.1 mm) at capture.

• river: Location of capture (Salmon or Trent Rivers).

Topic(s)

• Growth
• von Bertalanffy

Note

The original author used a linear model to describe the relationship between length and age.

Source

From Figure 2 of Reid, S.M. Age estimates and length distributions of Ontario channel darter (Percina copelandi) populations. Journal of Freshwater Ecology 19:441-444.

Examples

data(DarterOnt)
str(DarterOnt)
head(DarterOnt)
op <- par(mfrow=c(1,2),pch=19)
plot(tl~age,data=DarterOnt,subset=river=="Salmon",main="Salmon R.")
plot(tl~age,data=DarterOnt,subset=river=="Trent",main="Trent R.")
par(op)