Ages (subsample) and lengths (all fish) for Freshwater Drum from Lake Erie.

Description

A total of 253 fish dispersed proportionately over 10-mm total length intervals from the FWDrumLE1 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.

Format

A data frame with 1577 observations on the following 2 variables.

• age: Assigned ages (from scales).

• tl: Measured total lengths (mm).

Topic(s)

• Age-Length Key

See Also

FWDrumLE1.

Examples

data(FWDrumLE2)
str(FWDrumLE2)
head(FWDrumLE2)
## Extract the aged sample
FWD.aged <- subset(FWDrumLE2,!is.na(age))
str(FWD.aged)
## Extract the length sample
FWD.length <- subset(FWDrumLE2,is.na(age))
str(FWD.length)