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Catches in removal events for Brook Trout in the Nashwaak Experimental Watersheds Project.

Source: R/BrookTroutNEWP1.R
BrookTroutNEWP1.Rd

Catches in removal events for Brook Trout (Salvelinus fontinalis) in two streams in the the Nashwaak Experimental Watersheds Project on multiple dates. Includes results from Schnute (1983).

Format

A data frame of 16 observations on the following 7 variables:

sample

A unique identified for the sample.

stream

Stream (UNM=Upper Narrows Mountain Brook and Hay=Hyaden Brook).

section

Section of stream. See source.

date

Data of collections.

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.

Moran.N

Schnute (1983) estimate of N using the Moran (1951) method.

Moran.NLCI

Schnute (1983) estimate of N 95% LCI using the Moran (1951) method.

Moran.NUCI

Schnute (1983) estimate of N 95% UCI using the Moran (1951) method.

Moran.p

Schnute (1983) estimate of p using the Moran (1951) method.

Moran.LH

Schnute (1983) negative log likelihood using the Moran (1951) method.

Schnute.N

Schnute (1983) estimate of N.

Schnute.NLCI

Schnute (1983) estimate of N 95% LCI.

Schnute.NUCI

Schnute (1983) estimate of N 95% UCI.

Schnute.p1

Schnute (1983) estimate of p1.

Schnute.p

Schnute (1983) estimate of p.

Schnute.LH

Schnute (1983) negative log-likelihood.

ChiSq

Schnute (1983) chi-square from likelihood ratio comparison of Moran and Schnute methods.

Source

From Tables 1-3 in Schnute, J. 1983. A new approach to estimating populations by the removal method. Canadian Journal of Fisheries and Aquatic Sciences, 40:2153-2169. CSV file

Topic(s)

  • Population size

  • Abundance

  • Removal

See also

See BrookTroutNEWP for only the data (note the results from Schnute (1983)).

Examples

data(BrookTroutNEWP1)

## extract data for one stream, section, and date (e.g., 3rd row)
BrookTroutNEWP1[3,]
#>   sample stream section   date first second third fourth Moran.N Moran.NLCI
#> 3      3    UNM       4 Jul-74    48     10     6      6    71.1         70
#>   Moran.NUCI Moran.p Moran.LH Schnute.N Schnute.NLCI Schnute.NUCI Schnute.p1
#> 3       76.3    0.61     4.71      78.3           70          Inf       0.61
#>   Schnute.p Schnute.LH ChiSq
#> 3      0.34       2.22  4.98