eoa3: Evidence of Absence

In eoa3: Wildlife Mortality Estimator for Low Fatality Rates and Imperfect Detection

Evidence of Absence

Description

This package is designed to analyze searcher efficiency, carcass persistence, search schedule, and carcass observation data for the estimation of bird and bat mortality at wind and solar power facilities. It is specially designed for analyses when few carcasses are observed and detection probability is low. [It works fine for large counts as well, but some estimators (GenEst in particular) are more well-endowed with a wider array of tools for analysis of large-count data.

Main command-line functions

est_pk0, est_cp0, est_g0

estimate searcher efficiency (pk), carcass persistence (cp), and (g) parameters

postM, postM.ab

estimate posterior distribution of M given estimated g and carcass count (X)

calcMstar, MCI

calculate M* and credible interval for M

Potentially useful calculation functions

sim_pk0, sim_cp0

simulate estimated SE and CP parameters

GenEst::ppersist

calculate probability that a carcass that arrives at an (unknown) uniform random time in an interval persists until a later, specified time. This is the generalized r statistic for a given persistence distribution, arrival interval width, and search time.

Behind-the-scenes utility functions

fmmax, fmmax.ab

functions to calculate a suitable maximum value to truncate improper prior distributions of M

getab

function to extract MLE of pda and pdb parameters from a persistence distribution

eoa3 documentation built on April 3, 2025, 6:10 p.m.