perickson

Calculates carcass detection probability based on persistence time, searcher efficiency, search interval and duration of study.

misc

methods

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

perickson function

<dl> <dt>t.bar</dt>
<dd>mean carcass persistence time in days (or another time unit)</dd> <dt>s</dt>
<dd>mean (e.g. daily) carcass persistence probability.</dd>
 <dt>f</dt>
<dd>searcher efficiency: probability that a carcass present on the study plot is detected by a searcher during a seach.</dd> <dt>d</dt>
<dd>search interval: time (in days) between two searches</dd></dl>

Arguments

Author

Carcass detection probability acording to Erickson et al. 2004 — perickson

<dl>

 <dt>t.bar</dt>
<dd>mean carcass persistence time in days (or another time unit)</dd>

 <dt>s</dt>
<dd>mean (e.g. daily) carcass persistence probability.</dd>


 <dt>f</dt>
<dd>searcher efficiency: probability that a carcass present on the study plot is detected by a searcher during a seach.</dd>

 <dt>d</dt>
<dd>search interval: time (in days) between two searches</dd>

</dl>

perickson: Carcass detection probability acording to Erickson et al. 2004

Description

Usage

Value

Arguments

Author

Details

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Examples