ducknest

ducknest_units

ducknests_units

Simulated line transect survey of duck nests, designed to reproduce the data
of Figure 2 in Anderson and Pospahala (1970).

datasets

A simple way of fitting detection functions to distance sampling
data for both line and point transects. Adjustment term selection, left and
right truncation as well as monotonicity constraints and binning are
supported. Abundance and density estimates can also be calculated (via a
Horvitz-Thompson-like estimator) if survey area information is provided. See
Miller et al. (2019) <doi:10.18637/jss.v089.i01> for more information on
methods and <https://examples.distancesampling.org/> for example analyses.

Laura Marshall

Distance

Distance Sampling Detection Function and Abundance Estimation

ducknest function

A <code>data.frame</code> with 534 rows and 7 variables<ul>
<li><code>Region.Label</code> strata names (single stratum in this instance)</li>
<li><code>Area</code> size of refuge (0 in this case, actual size 60km^2)</li>
<li><code>Sample.Label</code> transect ID</li>
<li><code>Effort</code> length of transects (km)</li>
<li><code>object</code> nest ID</li>
<li><code>distance</code> perpendicular distance (m)</li>
<li><code>Study.Area</code> name of wildlife refuge</li>
</ul>

ducknest: Ducknest line transect survey data

Description

Arguments

Format

Details

References