Catches in removal events of Brown and Rainbow Trout at various locations.

Catches of Brown (Salmo trutta) and Rainbow Trout (Oncorhynchus mykiss) in consecutive removal events at various locations.

Format

A data frame of 40 observations on the following 10 variables:

species: Species of trout (brown or rainbow).
site: Site in the watershed. See source.
age0: Logical is TRUE if age-0 and FALSE if age is >0.
first: Catch on the first removal pass.
second: Catch on the second removal pass.
third: Catch on the third removal pass.
pop.cs: Population estimate by Carle-Strub method.
pop.sch: Population estimate by Schnute method.
q.cons: Logical is TRUE if catchability was constant.
rejected: Logical is TRUE if Schnute method rejected the population estimate because the standard error was too large.

Source

From Table 1 in Jones, M.L. and J.D. Stockwell. 1995. A rapid assessment procedure for enumeration of salmonine populations in streams. North American Journal of Fisheries Management, 15:551-562. CSV file

Topic(s)

Population size
Abundance
Removal

Examples

data(JonesStockwell)
str(JonesStockwell)
#> 'data.frame':	40 obs. of  10 variables:
#>  $ species : Factor w/ 2 levels "brown","rainbow": 2 2 2 2 2 2 2 2 2 2 ...
#>  $ site    : Factor w/ 12 levels "A10","A15","A9",..: 2 3 1 4 4 6 6 7 7 8 ...
#>  $ age0    : logi  FALSE TRUE TRUE TRUE FALSE TRUE ...
#>  $ first   : int  17 17 25 69 6 38 13 250 17 71 ...
#>  $ second  : int  10 12 10 43 2 20 10 166 5 48 ...
#>  $ third   : int  7 8 8 23 1 20 4 142 6 40 ...
#>  $ pop.cs  : int  40 47 48 164 9 108 30 927 30 250 ...
#>  $ pop.sch : num  42.1 50 48.5 166 9 114 31.5 942 31 260 ...
#>  $ q.cons  : logi  TRUE TRUE TRUE TRUE TRUE TRUE ...
#>  $ rejected: logi  FALSE FALSE FALSE FALSE FALSE FALSE ...
head(JonesStockwell)
#>   species site  age0 first second third pop.cs pop.sch q.cons rejected
#> 1 rainbow  A15 FALSE    17     10     7     40    42.1   TRUE    FALSE
#> 2 rainbow   A9  TRUE    17     12     8     47    50.0   TRUE    FALSE
#> 3 rainbow  A10  TRUE    25     10     8     48    48.5   TRUE    FALSE
#> 4 rainbow   B1  TRUE    69     43    23    164   166.0   TRUE    FALSE
#> 5 rainbow   B1 FALSE     6      2     1      9     9.0   TRUE    FALSE
#> 6 rainbow Bio1  TRUE    38     20    20    108   114.0   TRUE    FALSE

## extract data for one species, age, and site (e.g., 3rd row)
JonesStockwell[3,]
#>   species site age0 first second third pop.cs pop.sch q.cons rejected
#> 3 rainbow  A10 TRUE    25     10     8     48    48.5   TRUE    FALSE