The `alkdata`

data frame has 39 rows and 16 columns.
The age-length key for Gulf of Hauraki snapper shown in Table 8.3 of Quinn and Deriso (1999)

`alkdata`

This data frame contains the following columns:

- len
length interval

- nl
number measured in length interval

- A3
number of fish aged in each age class 3 within each length interval

- A4
number of fish aged in each age class 4 within each length interval

- A5
number of fish aged in each age class 5 within each length interval

- A6
number of fish aged in each age class 6 within each length interval

- A7
number of fish aged in each age class 7 within each length interval

- A8
number of fish aged in each age class 8 within each length interval

- A9
number of fish aged in each age class 9 within each length interval

- A10
number of fish aged in each age class 10 within each length interval

- A11
number of fish aged in each age class 11 within each length interval

- A12
number of fish aged in each age class 12 within each length interval

- A13
number of fish aged in each age class 13 within each length interval

- A14
number of fish aged in each age class 14 within each length interval

- A15
number of fish aged in each age class 15 within each length interval

- A16
number of fish aged in each age class 16 within each length interval