searches

Data containing the number of seen and not-seen items of a searcher efficiency trial performed in 3 different vegetation densities (visibilities) and for various persons.

datasets

The number of bird or bat fatalities from collisions with buildings, towers or wind energy turbines can be estimated based on carcass searches and experimentally assessed carcass persistence times and searcher efficiency. Functions for estimating the probability that a bird or bat that died is found by a searcher are provided. Further functions calculate the posterior distribution of the number of fatalities based on the number of carcasses found and the estimated detection probability.

Fraenzi KornerNievergelt

carcass

Estimation of the Number of Fatalities from Carcass Searches

searches function

A data frame with 17 observations on the following 4 variables.<dl>
 <dt><code>person</code></dt>
<dd>a factor with the names of the persons</dd> <dt><code>visibility</code></dt>
<dd>a factor with visibility classes (vegetation densities)</dd> <dt><code>detected</code></dt>
<dd>a numeric vector indicating the number of found items</dd> <dt><code>notdetected</code></dt>
<dd>a numeric vector indicating the number of not found items</dd> 
</dl>

Format

Data of a searcher efficiency trial — searches

A data frame with 17 observations on the following 4 variables.<dl>
 <dt><code>person</code></dt>
<dd>a factor with the names of the persons</dd>

 <dt><code>visibility</code></dt>
<dd>a factor with visibility classes (vegetation densities)</dd>

 <dt><code>detected</code></dt>
<dd>a numeric vector indicating the number of found items</dd>

 <dt><code>notdetected</code></dt>
<dd>a numeric vector indicating the number of not found items</dd>

 
</dl>

searches: Data of a searcher efficiency trial

Description

Usage

Arguments

Format

Examples