Croaker1: Ages of Atlantic Croaker assigned from otoliths by two...

In FSAdata: Data to Support Fish Stock Assessment ('FSA') Package

Ages of Atlantic Croaker assigned from otoliths by two readers.

Description

Otolith age of Atlantic croaker (Micropogonias undulatus) from two readers.

Format

A data frame of 317 observations on the following 2 variables:

reader1

Age assigned by the first reader

reader2

Age assigned by the second reader

Topic(s)

• Age Comparison

• Age Precision

• Age Bias

• Ageing Error

Source

From Figure 2 in Chapter 1 (Atlantic Croaker) of the VMRC Final Report on Finfish Ageing, 1999 by the Center for Quantitative Fisheries Ecology at Old Dominion University. CSV file

Examples

data(Croaker1)
str(Croaker1)
head(Croaker1)
plot(reader2~reader1,data=Croaker1)
xtabs(~reader1+reader2,data=Croaker1)

FSAdata documentation built on Aug. 24, 2023, 5:06 p.m.