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Filters: Tags: {"scheme":"https://www.sciencebase.gov/vocab/vocabulary/52dee7c5e4b0dee2a6cd6b18"} (X) > Date Range: {"choice":"year"} (X) > partyWithName: Charles J. Frost (X)

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The WBPHS is conducted by flying an aircraft along a set of segment lines. (One or more contiguous segments comprise a transect.) The geographic coordinates in WBPHS_Segment_Endpoints.csv represent the beginning and ending points of the segment lines in Alaska and Old Crow Flats (Yukon Territory) strata 1-12. The point coordinates in this file have been incorporated into various products (e.g., a GPS waypoints file) to aid in survey-flight navigation. The coordinates are in decimal degrees, WGS84 datum.The set of segments contained in this file was established in 1964. In the years 1957-1963, the survey design included many, but not all, of these segments. Additional segments were flown in some or all years during...
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In many areas surveyed during the North American WBPHS, ground surveys are conducted in conjunction with the aerial surveys to derive annual visibility correction factors (VCFs) for the aerial survey crews, which are used during analyses to adjust for detection bias. Due to the remoteness of strata 1–12, ground surveys are not conducted there. Instead, a set of fixed VCFs by species and basic habitat type (strata 1–7 = boreal forest; strata 8–11 = tundra; stratum 12) are used. The fixed VCFs that were used through 1991 were derived from work done in WBPHS prairie strata. During the years 1985–1991, efforts were made by the FWS Division of Migratory Bird Management-Alaska Region (MBM-Alaska) to develop more appropriate...
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WBPHS_Stratum_Areas.csv is a table that lists the area measurements (in square miles) for strata 1-12, as measured and adopted by survey designers in 1974. These measurements are used by MBM-AK in analyses to produce bird abundance estimates by species and stratum.
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This collection contains the original “raw” survey data that were recorded and transcribed by each observer during the Yukon-Kuskokwim Delta (YKD) Aerial Breeding Pair Survey. Left-front and right-front seat observers recorded data on geese, swans, and cranes since 1985, while data on eiders, ducks, and waterbirds was recorded by a right-rear seat observer since 1989. These raw transcribed data should be used to produce updated quality-control (QC) datasets by running the quality assurance/quality control script “AKaerial.R” whenever the quality control procedures are revised or modified. The data files in this collection were named using the following naming convention: YKD(YKG)YYYY_RawObs_OOOO, where YKD=Duck...
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The Yukon-Kuskokwim Delta (YKD) Aerial Breeding Pair Survey provides data on the spring abundance of targeted waterfowl species nesting on the YKD coastal zone in western Alaska. This region supports millions of waterbirds that comprise one of the largest and most important waterfowl breeding grounds in North America, including species of concern such as the red-throated loon (Gavia stellata), emperor goose (Chen canagica), Pacific black brant (Branta bernicla nigricans), common eider (Somateria mollissima), black scoter (Melanitta nigra), long-tailed duck (Clangula hyemalis), and the threatened spectacled eider (Somateria fischeri). The YKD goose, swan, and crane survey was first implemented in 1985 to monitor...
Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ANIMALS/VERTEBRATES, ANIMALS/VERTEBRATES, ANIMALS/VERTEBRATES, ANIMALS/VERTEBRATES, ANIMALS/VERTEBRATES, All tags...
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This dataset contains the swan data recorded during the 1968 Alaska Trumpeter Swan Survey. The 1968 survey was designed to census the entire Alaska trumpeter swan summering range.
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This dataset contains the swan data recorded during the 2005 Alaska Trumpeter Swan Survey. The 2005 survey was designed to census the entire Alaska trumpeter swan summering range.
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EstimatesTableWBPHS_20220125.csv is a table of bird abundance estimates by year and species, 1957-2021. It was produced by MBM-AK using AKaerial R code and the WBPHS_AK QC transcribed dataset. The date in the file name (format = YYYYMODA, where YYYY = year, MO = month, and DA = day) represents the date that the R code was run to produce the table. A data dictionary and details on analysis methods are provided at NEED TO ADD REFERENCE TO CHUCK’S R CODE/GITHUB WITH LINK.
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This collection contains the quality-control (QC) transcribed data from the Yukon-Kuskokwim Delta Aerial Breeding Pair Survey. These QC data were produced from the “raw” data using the R Package “AKaerial.” The raw data were evaluated against the current data standards in the ‘AKaerial data dictionary’ and saved to new QC data files with associated log files that document any changes that were made. From 1985 to 1997, observers recorded bird observations out to 200 meters from the aircraft using continuously running tape players (with a locational accuracy of +/- 5 km), while an automated voice recording survey program (with a spatial accuracy of +/- 0.5 km) was used to record data from 1998 to present. The data...
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Estimates_By_Year_2010to2015.csv summarizes the Alaska Trumpeter Swan Survey abundance estimates by survey year, 2010 and 2015. Estimates are rounded to the nearest integer.
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This collection contains the quality-control (QC) transcribed data from the Arctic Coastal Plain Aerial Breeding Pair Survey. These QC data were produced from the “raw” data using the R Package “AKaerial.” The raw data were evaluated against the current data standards in the ‘AKaerial data dictionary’ and saved to new QC data files with associated log files that document any changes that were made. The data files in this collection were named using the following naming convention: ACP_YYYY_QCObs_OOOO, where ACP=Arctic Coastal Plain, YYYY=Year, QCObs=Quality control observations, and OOOO=observer’s first initial and last name. These data contain known errors. These data should not be used except as raw input for...
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This multi-layer GeoPackage contains the Alaska Arctic Coastal Plain Aerial Breeding Pair Survey design transects from 2007 to present. The original transects were created as shapefiles and imported to this SQLite database. Transects were saved as individual polylines named according to the year they were created (e.g., “main.ACP_2007_Trans,” “main.ACP_2008_Trans,” “main.ACP_2009_Trans,” etc.). These aerial transects were developed systematically from randomly-selected start points and created along constant lines of latitude. The inter-transect spacing in the low, medium, high, and very-high density strata varies so that areas with higher waterfowl density are surveyed more intensively. The current four-year rotating...
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This dataset contains the swan data recorded during the 1985 Alaska Trumpeter Swan Survey. The 1985 survey was designed to census the entire Alaska trumpeter swan summering range.
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This dataset contains the swan data recorded during the 1980 Alaska Trumpeter Swan Survey. The 1980 survey was designed to census the entire Alaska trumpeter swan summering range.
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This dataset contains the swan data recorded during the 2015 Alaska Trumpeter Swan Survey. The 2015 survey was a stratified random-sample plot design with optimal allocation of sampling effort to minimize cost for a fixed variance.
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This dataset contains the swan data recorded during the 1990 Alaska Trumpeter Swan Survey. The 1990 survey was designed to census the entire Alaska trumpeter swan summering range.
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This multi-layer GeoPackage contains the YKD Coastal Zone Survey design transects from 1985 to present. The original transects were imported to this SQLite database structure and saved as individual polylines named according to the year they were created (e.g., “main.YK_1985_Trans,” “main.YK_1986_Trans,” “main.YK_1987_Trans,” etc.). The aerial transects were developed systematically from randomly-selected start points and created along constant lines of latitude. The inter-transect spacing in the low, medium, high, and very-high density strata varies so that areas with higher waterfowl density are surveyed more intensively. Though the overall study area never changed, the YKD Survey design was modified several times,...
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This dataset contains the swan data recorded during the 2010 Alaska Trumpeter Swan Survey. The 2010 survey was a stratified random-sample plot design with optimal allocation of sampling effort to minimize cost for a fixed variance.
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This dataset contains the swan data recorded during the 2000 Alaska Trumpeter Swan Survey. The 2000 survey was designed to census the entire Alaska trumpeter swan summering range.
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This dataset contains the swan data recorded during the 1975 Alaska Trumpeter Swan Survey. The 1975 survey was designed to census the entire Alaska trumpeter swan summering range.
map background search result map search result map Alaska Arctic Coastal Plain Aerial Breeding Pair Survey Design Transect Geodata Alaska Arctic Coastal Plain Aerial Breeding Pair Survey QC Transcribed Data 2007-present 2010 Alaska Trumpeter Swan Survey Data 2005 Alaska Trumpeter Swan Survey Data 1985 Alaska Trumpeter Swan Survey Data 1968 Alaska Trumpeter Swan Survey Data 1975 Alaska Trumpeter Swan Survey Data 2015 Alaska Trumpeter Swan Survey Data 1980 Alaska Trumpeter Swan Survey Data Alaska Trumpeter Swan Survey Estimates by Year 2010-2015 2000 Alaska Trumpeter Swan Survey Data 1990 Alaska Trumpeter Swan Survey Data Waterfowl Breeding Population Habitat Survey Alaska Abundance Estimate data Waterfowl Breeding Population Habitat Survey Alaska Segment Endpoints Waterfowl Breeding Population Habitat Survey Alaska Species Visibility Correction Factors data Waterfowl Breeding Population Habitat Survey Alaska Stratum Areas data Alaska Yukon-Kuskokwim Delta Aerial Breeding Pair Survey Alaska Yukon-Kuskokwim Delta Aerial Survey Design Transects Alaska Yukon-Kuskokwim Delta Aerial Survey Raw Transcribed Data Alaska Yukon-Kuskokwim Delta Aerial Survey QC Transcribed Data Alaska Yukon-Kuskokwim Delta Aerial Breeding Pair Survey Alaska Yukon-Kuskokwim Delta Aerial Survey Design Transects Alaska Yukon-Kuskokwim Delta Aerial Survey Raw Transcribed Data Alaska Yukon-Kuskokwim Delta Aerial Survey QC Transcribed Data Alaska Arctic Coastal Plain Aerial Breeding Pair Survey Design Transect Geodata Alaska Arctic Coastal Plain Aerial Breeding Pair Survey QC Transcribed Data 2007-present Waterfowl Breeding Population Habitat Survey Alaska Abundance Estimate data Waterfowl Breeding Population Habitat Survey Alaska Segment Endpoints Waterfowl Breeding Population Habitat Survey Alaska Species Visibility Correction Factors data Waterfowl Breeding Population Habitat Survey Alaska Stratum Areas data 2010 Alaska Trumpeter Swan Survey Data 2005 Alaska Trumpeter Swan Survey Data 1985 Alaska Trumpeter Swan Survey Data 1968 Alaska Trumpeter Swan Survey Data 1975 Alaska Trumpeter Swan Survey Data 2015 Alaska Trumpeter Swan Survey Data 1980 Alaska Trumpeter Swan Survey Data Alaska Trumpeter Swan Survey Estimates by Year 2010-2015 2000 Alaska Trumpeter Swan Survey Data 1990 Alaska Trumpeter Swan Survey Data