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Catches of various species in consecutive removal events at various locations.

Format

A data frame of 58 observations on the following 7 variables:

species

Species of fish.

stream

Stream name.

first

Catch on the first removal pass.

second

Catch on the second removal pass.

third

Catch on the third removal pass.

fourth

Catch on the fourth removal pass.

pop.cs

Population estimate by Carle-Strub method.

Source

From Appendix in Simonson, T.D. and J. Lyons. 1995. Comparison of catch per effort and removal procedures for sampling stream fish assemblages. North American Journal of Fisheries Management 15:419-427. CSV file

Topic(s)

  • Population size

  • Abundance

  • Removal

Examples

data(SimonsonLyons)
str(SimonsonLyons)
#> 'data.frame':	58 obs. of  7 variables:
#>  $ species: Factor w/ 27 levels "Campostoma.anomalum",..: 22 23 26 4 1 9 22 23 26 2 ...
#>  $ stream : Factor w/ 9 levels "Bohris","Joos",..: 1 1 1 1 2 2 2 2 2 2 ...
#>  $ first  : int  68 55 55 46 163 250 33 129 163 39 ...
#>  $ second : int  17 11 12 23 14 37 10 33 12 1 ...
#>  $ third  : int  5 9 0 24 2 6 2 4 2 0 ...
#>  $ fourth : int  NA NA NA NA NA NA NA NA NA NA ...
#>  $ pop.cs : int  91 77 67 130 179 293 45 167 177 40 ...
head(SimonsonLyons)
#>                   species stream first second third fourth pop.cs
#> 1   Rhinichthys.atratulus Bohris    68     17     5     NA     91
#> 2  Rhinichthys.cataractae Bohris    55     11     9     NA     77
#> 3 Semotilus.atromaculatus Bohris    55     12     0     NA     67
#> 4       Culaea.inconstans Bohris    46     23    24     NA    130
#> 5     Campostoma.anomalum   Joos   163     14     2     NA    179
#> 6       Hotropis.dorsalis   Joos   250     37     6     NA    293

## extract data for one species and stream (e.g., 3rd row)
SimonsonLyons[3,]
#>                   species stream first second third fourth pop.cs
#> 3 Semotilus.atromaculatus Bohris    55     12     0     NA     67