Ages (subsample) and lengths (all fish) for Morwong from Morwong4.
A total of 104 fish dispersed proportionately over 1-cm fork length intervals from the Morwong4 data frame was obtained for age assignment. The remaining fish in the file were only measured for length (i.e., the ages were deleted). This data file can be used to demonstrate the use of age-length keys.
A data frame with 392 observations on the following 2 variables.
Fork lengths (cm)
Assigned ages
Age-Length Key
data(Morwong4a) str(Morwong4a) head(Morwong4a) ## extract aged sample m4a.aged <- subset(Morwong4a,!is.na(age)) str(m4a.aged) ## extract length sample m4a.length <- subset(Morwong4a,is.na(age)) str(m4a.length)
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