Summarized multiple mark-recapture data for Tan Riffleshell.

Format

A data frame with 6 observations on the following 4 variables.

t: Sample number
caught: Total number of fish caught in the sample
recaps: Number of previously marked fish in the sample
retmarks: Number of marked fish returned to the population

Source

From Table 1-2 of Rogers, S.O. 1999. Population biology of the Tan Riffleshell (Epioblasma florentina walkeri) and the effects of substratum and light on juvenile mussel propagation. Virginia Tech M.S. Thesis. CSV file

Details

The number of mussels caught in multiple samples of Tan Riffleshell (Epioblasma florentina walkeri) from Indian Creek, Virginia. The caught fish were examined for previous marks, marked (if previously unmarked), and then returned to the population.

Topic(s)

Population Size
Abundance
Mark-Recapture
Capture-Recapture
Schnabel
Schumacher-Eschmeyer

Examples

data(Riffleshell)
str(Riffleshell)
#> 'data.frame':	6 obs. of  4 variables:
#>  $ t       : int  1 2 3 4 5 6
#>  $ caught  : int  56 66 13 8 23 17
#>  $ recaps  : int  0 5 2 1 2 2
#>  $ retmarks: int  56 66 13 8 23 0
head(Riffleshell)
#>   t caught recaps retmarks
#> 1 1     56      0       56
#> 2 2     66      5       66
#> 3 3     13      2       13
#> 4 4      8      1        8
#> 5 5     23      2       23
#> 6 6     17      2        0