survey.region.dht

Extrapolate Horvitz-Thompson abundance estimates to entire surveyed region

utility

Animal abundance estimation via conventional, multiple covariate
and mark-recapture distance sampling (CDS/MCDS/MRDS). Detection function
fitting is performed via maximum likelihood. Also included are diagnostics
and plotting for fitted detection functions. Abundance estimation is via a
Horvitz-Thompson-like estimator.

Laura Marshall

mrds

Mark-Recapture Distance Sampling

survey.region.dht function

<dl><dt>Nhat.by.sample</dt>
<dd>dataframe of abundance by sample</dd>
<dt>samples</dt>
<dd>samples table</dd>
<dt>width</dt>
<dd>truncation width</dd>
<dt>left</dt>
<dd>left truncation if any</dd>
<dt>point</dt>
<dd>if TRUE point count otherwise line transect</dd>
<dt>areas.supplied</dt>
<dd>if <code>TRUE</code>, covered area is extracted from the
<code>CoveredArea</code> column of <code>Nhat.by.sample</code></dd></dl>

Arguments

Author

Extrapolate Horvitz-Thompson abundance estimates to entire surveyed region — survey.region.dht

<dl>

<dt>Nhat.by.sample</dt>
<dd>dataframe of abundance by sample</dd>


<dt>samples</dt>
<dd>samples table</dd>


<dt>width</dt>
<dd>truncation width</dd>


<dt>left</dt>
<dd>left truncation if any</dd>


<dt>point</dt>
<dd>if TRUE point count otherwise line transect</dd>


<dt>areas.supplied</dt>
<dd>if <code>TRUE</code>, covered area is extracted from the
<code>CoveredArea</code> column of <code>Nhat.by.sample</code></dd>

</dl>

survey.region.dht: Extrapolate Horvitz-Thompson abundance estimates to entire surveyed region

Description

Usage

Value

Arguments

Author