est_abundance: Estimate Abundance

In ryankinzer/cuyem: Snake River Basin Anadromous Fish Summaries and Metric Estimation

Estimate Abundance

Description

Estimate abundance using the adjusted Peterson formula for a closed population (Chapman 1951).

Usage

est_abundance(
  n1,
  n2,
  m2,
  method = c("adjusted Peterson"),
  CItype = c("normal", "binomial", "Poisson", "hypergeometric"),
  alpha = 0.05
)

Arguments

n1	a vector of the number of fish marked and released at the first capture occasion; M
n2	a vector of the number of fish captured at the second occasion; C
m2	a vector of the number of fish captured at the second occasion with a mark; R
method	M/R estimate type; "adjusted peterson',
CItype	c('normal','binomial', 'poisson', 'hypergeometric')
alpha	type I error rate. Default is set at 0.05 to produce 95% confidence intervals.

Author(s)

Ryan N. Kinzer

Examples

adjPeterson(n1 = c(100, 1000), n2 = c(50, 500), m2 = c(25, 250))

ryankinzer/cuyem documentation built on April 20, 2024, 2:10 p.m.