obs.m

Operational survey data for moose in MN (during years 2004-2007). Each
record corresponds to an independently sighted group of moose, with variables
that capture individual covariates (used in the detection model) as well as
plot-level information (stratum identifier, sampling probability, etc).

datasets

Uses logistic regression to model the probability of detection as a function of covariates.
This model is then used with observational survey data to estimate population size, while
accounting for uncertain detection.  See Steinhorst and Samuel (1989).

Carl Schwarz

SightabilityModel

Wildlife Sightability Modeling

Fieberg John

Schwarz Carl James

obs.m function

A data frame with 805 observations on the following 11 variables.<dl>
 <dt>year</dt>
<dd>year of survey</dd> <dt>stratum</dt>
<dd>stratum identifier</dd>
 <dt>subunit</dt>
<dd>sample
 plot ID</dd>
 
 <dt>total</dt>
<dd>number of moose observed</dd> <dt>cows</dt>
<dd>number of cows observed</dd>
 <dt>calves</dt>
<dd>number of
 calves observed</dd>
 
 <dt>bulls</dt>
<dd>number of bulls observed</dd> <dt>unclass</dt>
<dd>number of unclassified animals observed (could not
 identify sex/age class)</dd>
 
 <dt>voc</dt>
<dd>measurement of visual
 obstruction</dd>
 
 <dt>grpsize</dt>
<dd>group size (cluster size)</dd>
 </dl>

Format

MN moose survey data — obs.m

A data frame with 805 observations on the following 11 variables.<dl>
 <dt>year</dt>
<dd>year of survey</dd>

 <dt>stratum</dt>
<dd>stratum identifier</dd>
 <dt>subunit</dt>
<dd>sample
 plot ID</dd>
 
 <dt>total</dt>
<dd>number of moose observed</dd>

 <dt>cows</dt>
<dd>number of cows observed</dd>
 <dt>calves</dt>
<dd>number of
 calves observed</dd>
 
 <dt>bulls</dt>
<dd>number of bulls observed</dd>

 <dt>unclass</dt>
<dd>number of unclassified animals observed (could not
 identify sex/age class)</dd>
 
 <dt>voc</dt>
<dd>measurement of visual
 obstruction</dd>
 
 <dt>grpsize</dt>
<dd>group size (cluster size)</dd>
 

</dl>

obs.m: MN moose survey data

Description

Arguments

Format

References

Examples