Ages of Bluefish assigned from otoliths by two readers.

Description

Ages assigned to Bluefish (Pomatomus saltatrix) otoliths by two readers.

Format

A data frame with 445 observations on the following 2 variables.

• r1: Ages assigned by the first reader
• r2: Ages assigned by the second reader

Topic(s)

• Age Comparison
• Age Precision
• Age Bias
• Ageing Error

Source

From Figure 2 in Chapter 3 (Bluefish) of the VMRC Final Report on Finfish Ageing, 2003 by the Center for Quantitative Fisheries Ecology at Old Dominion University.

Examples

data(BluefishAge)
str(BluefishAge)
head(BluefishAge)
plot(r1~r2,data=BluefishAge)