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Catches in removal events of Cutthroate Trout and Steelhead of various sizes in two reaches of McGarvey Creek (CA).

Source: R/SalmonidsMCCA.R
SalmonidsMCCA.Rd

Catches in removal events of Cutthroate Trout (Oncorhynchus clarki) and Steelhead (Oncorhynchus mykiss) of various sizes in two reaches of McGarvey Creek (CA).

Format

A data frame of 5 observations on the following 5 variables:

reach

Sampling location.

group

Size or species caught (fry=both age-0 Cutthroat Trout and Steelhead, Steelhead=age-1+ Steelhead, or Cutthroat=age-1+ Cutthroat Trout).

pass1

Catch on the first removal pass.

pass2

Catch on the second removal pass.

pass3

Catch on the third removal pass.

Source

From Table 2 of Voight, H. 1999. Assessment of juvenile salmonid populations in two index reaches of McGarvey Creek, a tributary to the lower Klamath River. First Year of Investigations - 1998. [Was (is?) from http://www.krisweb.com/biblio/klamath_yuroktfp_voight_1999_7.pdf.] CSV file

Details

Sampling was conducted using a Smith Root model 15-D POW electrofisher. Block nets were placed at upstream and downstream reach boundaries. Efforts were made to keep the effort consistent between passes. Fixed electrofisher settings were used to maintain capture probabilities during sampling. Index reaches were rested for at least 90 minutes between passes to allow recovery time for fish not captured.Fish were measured (fork length in mm) and weighed to the nearest 0.1 gm. Scales were collected from below the dorsal fin on both left and right sides of selected fish. After data were recorded for each pass, fish were placed in a loating live car until all sampling was completed. Fish were then released throughout the reach.

Topic(s)

  • Population size

  • Abundance

  • Removal

Examples

data(SalmonidsMCCA)
str(SalmonidsMCCA)
#> 'data.frame':	5 obs. of  5 variables:
#>  $ reach: Factor w/ 2 levels "lower","upper": 1 1 1 2 2
#>  $ group: Factor w/ 3 levels "Cutthroat","fry",..: 2 3 1 2 1
#>  $ pass1: int  85 5 14 64 25
#>  $ pass2: int  26 1 4 23 3
#>  $ pass3: int  13 2 0 5 0
head(SalmonidsMCCA)
#>   reach     group pass1 pass2 pass3
#> 1 lower       fry    85    26    13
#> 2 lower Steelhead     5     1     2
#> 3 lower Cutthroat    14     4     0
#> 4 upper       fry    64    23     5
#> 5 upper Cutthroat    25     3     0

## extract data for one reach and group (e.g., 3rd row)
SalmonidsMCCA[3,]
#>   reach     group pass1 pass2 pass3
#> 3 lower Cutthroat    14     4     0