Ages of Atlantic Croaker assigned from otoliths by two readers.
Otolith age of Atlantic croaker (Micropogonias undulatus) from two readers.
A data frame of 317 observations on the following 2 variables:
Age assigned by the first reader
Age assigned by the second reader
Age Comparison
Age Precision
Age Bias
Ageing Error
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.
data(Croaker1) str(Croaker1) head(Croaker1) plot(reader2~reader1,data=Croaker1) xtabs(~reader1+reader2,data=Croaker1)
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