WBPHSHistoric: Current table of historic estimates for the WBPHS survey
In USFWS/AKaerial: Analysis of Alaska Region Aerial Survey Data
WBPHSHistoric R Documentation
Current table of historic estimates for the WBPHS survey
Description
Population indices for the USFWS Alaska Region Migratory Bird Management component of the WBPHS.
The survey consists of low-level aerial observations of waterfowl on a stratified strip transect design.
For more information on how the estimates are generated, see ReadWBPHS or WBPHStidy.
For definitions of the indices, see AdjustCounts. For a complete list of input files, see MasterFileList_WBPHS.
Usage
data(WBPHSHistoric)
Format
A data frame of 44 columns covering years 1957-2021:
- Species
The 4-character code for the species represented, see sppntableWBPHS.
- Year
The 4-digit integer year of the survey, range from 1957 to 2021 (no survey in 2020).
- Stratum
The 2-digit code representing the stratum of the estimate (1-12,99).
- total.density
Density of total birds (floating point decimal, birds per square mile).
- itotal.density
Density of indicated total birds (floating point decimal, birds per square mile).
- ibb.density
Density of indicated breeding birds (floating point decimal, birds per square mile).
- sing1pair2.density
Density of singles and pairs (floating point decimal, birds per square mile).
- flock.density
Density of flocked birds (floating point decimal, birds per square mile).
- n
Number of transects sampled in the stratum.
- total.numerator
Numerator component of the variance of total.est (floating point decimal, see vignette("GeneratingWBPHSEstimates", package = "AKaerial")).
- itotal.numerator
Numerator component of the variance of itotal.est (floating point decimal, see vignette("GeneratingWBPHSEstimates", package = "AKaerial")).
- ibb.numerator
Numerator component of the variance of ibbtotal.est (floating point decimal, see vignette("GeneratingWBPHSEstimates", package = "AKaerial")).
- sing1pair2.numerator
Numerator component of the variance of sing1pair2.est (floating point decimal, see vignette("GeneratingWBPHSEstimates", package = "AKaerial")).
- flock.numerator
Numerator component of the variance of flock.est (floating point decimal, see vignette("GeneratingWBPHSEstimates", package = "AKaerial")).
- denominator
Denominator component of the variances (floating point decimal, see vignette("GeneratingWBPHSEstimates", package = "AKaerial")).
- Area
Variance of total.est (floating point decimal).
- total.est
Estimate of total birds (floating point decimal).
- total.var
Variance of total.est (floating point decimal).
- total.se
Standard error of total.est (floating point decimal).
- itotal.est
Estimate of indicated total birds (floating point decimal).
- itotal.var
Variance of itotal.est (floating point decimal).
- itotal.se
Standard error of itotal.est (floating point decimal).
- ibb.est
Estimate of indicated breeding birds (floating point decimal).
- ibb.var
Variance of ibb.est (floating point decimal).
- ibb.se
Standard error of ibb.est (floating point decimal).
- sing1pair2.est
Estimate of singles and paired birds (floating point decimal).
- sing1pair2.var
Variance of sing1pair2.est (floating point decimal).
- sing1pair2.se
Standard error of sing1pair2.est (floating point decimal).
- flock.est
Estimate of flocked birds (floating point decimal).
- flock.var
Variance of flock.est (floating point decimal).
- flock.se
Standard error of flock.est (floating point decimal).
- VCF
Visibility correction factor (floating point decimal).
- VCF_SE
Standard error of VCF (floating point decimal).
- VCF.var
Variance of VCF (floating point decimal).
- adj.total.est
VCF-adjusted total birds estimate (floating point decimal).
- adj.total.se
Standard error of the VCF-adjusted total birds estimate (floating point decimal).
- adj.itotal.est
VCF-adjusted indicated total birds estimate (floating point decimal).
- adj.itotal.se
Standard error of the VCF-adjusted indicated total birds estimate (floating point decimal).
- adj.ibb.est
VCF-adjusted indicated breeding birds estimate (floating point decimal).
- adj.ibb.se
Standard error of the VCF-adjusted indicated breeding birds estimate (floating point decimal).
- adj.sing1pair2.est
VCF-adjusted single and paired birds estimate (floating point decimal).
- adj.sing1pair2.se
Standard error of the VCF-adjusted single and paired birds estimate (floating point decimal).
- adj.flock.est
VCF-adjusted flocked birds estimate (floating point decimal).
- adj.flock.se
Standard error of the VCF-adjusted flocked birds estimate (floating point decimal).
USFWS/AKaerial documentation built on April 3, 2025, 4:06 p.m.
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| WBPHSHistoric | R Documentation |
Current table of historic estimates for the WBPHS survey
Description
Population indices for the USFWS Alaska Region Migratory Bird Management component of the WBPHS.
The survey consists of low-level aerial observations of waterfowl on a stratified strip transect design.
For more information on how the estimates are generated, see ReadWBPHS or WBPHStidy.
For definitions of the indices, see AdjustCounts. For a complete list of input files, see MasterFileList_WBPHS.
Usage
data(WBPHSHistoric)
Format
A data frame of 44 columns covering years 1957-2021:
- Species
The 4-character code for the species represented, see
sppntableWBPHS.- Year
The 4-digit integer year of the survey, range from 1957 to 2021 (no survey in 2020).
- Stratum
The 2-digit code representing the stratum of the estimate (1-12,99).
- total.density
Density of total birds (floating point decimal, birds per square mile).
- itotal.density
Density of indicated total birds (floating point decimal, birds per square mile).
- ibb.density
Density of indicated breeding birds (floating point decimal, birds per square mile).
- sing1pair2.density
Density of singles and pairs (floating point decimal, birds per square mile).
- flock.density
Density of flocked birds (floating point decimal, birds per square mile).
- n
Number of transects sampled in the stratum.
- total.numerator
Numerator component of the variance of total.est (floating point decimal, see
vignette("GeneratingWBPHSEstimates", package = "AKaerial")).- itotal.numerator
Numerator component of the variance of itotal.est (floating point decimal, see
vignette("GeneratingWBPHSEstimates", package = "AKaerial")).- ibb.numerator
Numerator component of the variance of ibbtotal.est (floating point decimal, see
vignette("GeneratingWBPHSEstimates", package = "AKaerial")).- sing1pair2.numerator
Numerator component of the variance of sing1pair2.est (floating point decimal, see
vignette("GeneratingWBPHSEstimates", package = "AKaerial")).- flock.numerator
Numerator component of the variance of flock.est (floating point decimal, see
vignette("GeneratingWBPHSEstimates", package = "AKaerial")).- denominator
Denominator component of the variances (floating point decimal, see
vignette("GeneratingWBPHSEstimates", package = "AKaerial")).- Area
Variance of total.est (floating point decimal).
- total.est
Estimate of total birds (floating point decimal).
- total.var
Variance of total.est (floating point decimal).
- total.se
Standard error of total.est (floating point decimal).
- itotal.est
Estimate of indicated total birds (floating point decimal).
- itotal.var
Variance of itotal.est (floating point decimal).
- itotal.se
Standard error of itotal.est (floating point decimal).
- ibb.est
Estimate of indicated breeding birds (floating point decimal).
- ibb.var
Variance of ibb.est (floating point decimal).
- ibb.se
Standard error of ibb.est (floating point decimal).
- sing1pair2.est
Estimate of singles and paired birds (floating point decimal).
- sing1pair2.var
Variance of sing1pair2.est (floating point decimal).
- sing1pair2.se
Standard error of sing1pair2.est (floating point decimal).
- flock.est
Estimate of flocked birds (floating point decimal).
- flock.var
Variance of flock.est (floating point decimal).
- flock.se
Standard error of flock.est (floating point decimal).
- VCF
Visibility correction factor (floating point decimal).
- VCF_SE
Standard error of VCF (floating point decimal).
- VCF.var
Variance of VCF (floating point decimal).
- adj.total.est
VCF-adjusted total birds estimate (floating point decimal).
- adj.total.se
Standard error of the VCF-adjusted total birds estimate (floating point decimal).
- adj.itotal.est
VCF-adjusted indicated total birds estimate (floating point decimal).
- adj.itotal.se
Standard error of the VCF-adjusted indicated total birds estimate (floating point decimal).
- adj.ibb.est
VCF-adjusted indicated breeding birds estimate (floating point decimal).
- adj.ibb.se
Standard error of the VCF-adjusted indicated breeding birds estimate (floating point decimal).
- adj.sing1pair2.est
VCF-adjusted single and paired birds estimate (floating point decimal).
- adj.sing1pair2.se
Standard error of the VCF-adjusted single and paired birds estimate (floating point decimal).
- adj.flock.est
VCF-adjusted flocked birds estimate (floating point decimal).
- adj.flock.se
Standard error of the VCF-adjusted flocked birds estimate (floating point decimal).
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