Ages of Morwong assigned from otoliths by two readers.

Description

Ages assigned by two different readers to the otoliths of Jackass Morwong (Nemadactylus macropterus).

Format

A data frame with 58 paired observations on the following 2 variables.

• readerA: Ages assigned by Reader A
• readerB: Ages assigned by Reader B

Topic(s)

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

Source

From Table 7 of Restall, J.E., and K. Krusic-Golub. 2004. Development of jackass morwong age-length keys for 2000-2002. Final report to Australian Fisheries Management Authority. 13 pp. Primary Industries Research Victoria, Queenscliff. Available at http://web-test.afma.gov.au/wp-content/uploads/2010/07/r03_1724b.pdf.

Examples

data(Morwong3)
str(Morwong3)
head(Morwong3)
plot(readerB~readerA,data=Morwong3)
with(Morwong3,table(readerA,readerB))