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
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