CreekChub {FSAdata}

Ages (subsample) and lengths (all fish) for Creek Chub.

Description

Ages (subsample) and lengths (all fish) for Creek Chub (Semotilus atromaculatus).

Format

A data frame with 218 observations on the following 2 variables.

len

Total length (mm)

age

Assigned ages (yrs; from scales)

Details

As many as 10 fish per 10 mm length interval were sampled for age assignment with scales.

Topic(s)

• Age-Length Key

• Growth

Note

Used in the Introductory Fisheries Analyses with R book.

Source

Recreated (random digits were added to construct mm lengths from the cm length bins) from information in Box 15.2 of Quist, M.C., Pegg, M.A., and DeVries, D.R. 2012. Age and growth. In Zale, A.V., Parrish, D.L., and Sutton, T.M., editors. Fisheries Techniques, Third Edition, chapter 15, pages 677-731. American Fisheries Society, Bethesda, MD. CSV file

Examples

data(CreekChub)
str(CreekChub)
head(CreekChub)
xtabs(~age,data=CreekChub)
plot(len~age,data=CreekChub)