est_abundance_sgs: Redd Expansion Using Females and Prespawn Mortality

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

Redd Expansion Using Females and Prespawn Mortality

Description

Estimate abundance of fish using the Chasco et al. (2014) redd expansion. The calculation expands redds using female and prespawn mortality proportions.

Usage

est_abundance_sgs(
  R,
  p_F,
  SE_F,
  p_Psp,
  SE_Psp,
  CI_type = c("delta", "boot"),
  alpha = 0.05,
  iterations = 1000
)

Arguments

R	total redd number
p_F	female proportion
SE_F	standard error of female proportion
p_Psp	prespawn mortality proportion
SE_Psp	standard error of prespawne mortality
CI_type	either a delta or bootstrap method for precision estimates
alpha	type I error rate. Default is set at 0.05 to produce 95% confidence intervals
iterations	bootstrap iterations

Author(s)

Ryan N. Kinzer

Examples

est_abundance_sgs(100, .5, .02, .1, .01, alpha = .05)

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