Ages (subsample) and lengths (all fish) for Rock Bass from Lake Ontario.

Description

Ages (subsample) and lengths (all fish) for Rock Bass from Lake Ontario.

Format

A data frame with 1288 observations on the following 2 variables:

• age: Assigned ages (from scales)
• tl: Measured total lengths (mm)

Details

As many as 10 fish per 10-mm total length intervals from the RockBassLO1 data.frame was obtained for age assignment. The remaining fish in the file were only measure for length (i.e., the ages were deleted). This data file can be used to demonstrate the use of age-length keys.

Topic(s)

• Age-Length Key

See Also

RockBassLO1.

Examples

data(RockBassLO2)
str(RockBassLO2)
head(RockBassLO2)

## extract aged sample
rb.aged <- subset(RockBassLO2,!is.na(age))

## extract length sample
rb.length <- subset(RockBassLO2,is.na(age))