GuyBrownDepl: 3 pass depletion estimator
In KevinSee/SiteAbundances: Template

Description Usage Arguments Value Author(s) References Examples

a function to estimate abundance based on a three pass depletion method

1	GuyBrownDepl(data)

data

dataframe or matrix with three columns containing the counts from each pass.

Returns a dataframe consisting of 3 columns:

`N.hat`	- estimate of abundance
`N.hat.SE`	- standard error of the estimate of abundance
`p.hat`	- estimate of the probability of capture

Kevin See, QCI, Seattle, WA

Hayes, D.B., J.R. Bence, T.J. Kwak, and B.E. Thompson. 2007. Abundance, biomass, and production. Pages 327-374 in C.S. Guy and M.L. Brown, editors. Analysis and interpretation of freshwater fisheries data. American Fisheries Society, Bethesda, Maryland.

data(depl.data)
# pull out examples with three-pass depletion data
three.pass.data = subset(depl.data, n.pass==3, select=c('pass.1', 'pass.2', 'pass.3'))
# estimate abundance
GuyBrownDepl(three.pass.data)