Single census mark-recapture data for Brown Trout (Salmo trutta) from Valley Creek, MN captured in April, 1988. Length of trout was recorded so that abundance estimated can be made by length categories.

## Format

A data frame with 1014 observations on the following 3 variables.

len

A numeric vector of total length measurements (cm)

sample

A factor variable representing the sample in which the fish was captured. The marking run is labelled with first and the recapture run is labelled with second

recap

A factor variable representing whether the fish was a “recap”ture in the second sample (YES) or not (NO)

## Source

Obtained directly from Tom Kwak, North Carolina Cooperate Unit at North Carolina State University and part of the data published in Kwak, T.J. and T.F. Waters. 1997. Trout production dynamics and water quality in Minnesota streams. Transactions of the American Fisheries Society, 126:35-48. CSV file

## Topic(s)

• Population Size

• Abundance

• Mark-Recapture

• Capture-Recapture

• Petersen

## Examples

data(BrownTroutVC1)
str(BrownTroutVC1)
#> 'data.frame':	1014 obs. of  3 variables:
#>  $len : num 11.8 11.2 8 14.1 18.1 9 10.4 8.1 7.6 8.1 ... #>$ sample: Factor w/ 2 levels "first","second": 1 1 1 1 1 1 1 1 1 1 ...
#>  $recap : Factor w/ 2 levels "NO","YES": 1 1 1 1 1 1 1 1 1 1 ... head(BrownTroutVC1) #> len sample recap #> 1 11.8 first NO #> 2 11.2 first NO #> 3 8.0 first NO #> 4 14.1 first NO #> 5 18.1 first NO #> 6 9.0 first NO hist(BrownTroutVC1$len,main="")