Ages of Morwong assigned from otoliths by Reader A at two times.
Ages assigned at two different times by Reader A to the otoliths of Jackass Morwong (Nemadactylus macropterus).
A data frame with 217 paired observations on the following 2 variables.
Ages assigned on the first reading
Ages assigned on the second reading
Age Comparison
Age Precision
Age Bias
Ageing Error
From Table 5 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. Was (is?) available at http://web-test.afma.gov.au/wp-content/uploads/2010/07/r03_1724b.pdf.
data(Morwong1) str(Morwong1) head(Morwong1) plot(second~first,data=Morwong1) xtabs(~first+second,data=Morwong1)
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