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Folders: ROOT > ScienceBase Catalog > US Fish and Wildlife Service (USFWS) > Programs > Migratory Birds > Region 7 U.S. Fish and Wildlife Service Migratory Bird Management > USFWS MBM Alaska Waterfowl Program ( Show direct descendants )

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The document reviews the theory of distance sampling, important assumptions, and case studies where distance sampling has been used. Reported in this document are results from some power analysis to guide design of a pilot study. This report became part of a Master’s thesis project and was used for development of a field protocol.
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The Spectacled Recovery Plan identified annual nesting surveys as the primary method to assess recovery status for Alaska’s Yukon-Kuskokwim Delta (YKD) subpopulation. In addition to documenting population status for spectacled eiders, the survey provides annual information on egg production, nesting effort, phenology, and habitat use for three other focal species including cackling geese, emperor geese, and greater white-fronted geese. Numbers of nests of the four species are stable or increasing in the short-term (2007-2016) and long-term (1985-2016). In 2016, the estimated number of spectacled eider nests (9,464) was the second highest in the history of the survey, but nest success was poor and clutch size very...
Categories: Data; 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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The Pacific Flyway Winter Brant Survey (WBS) has been conducted annually since 1981 as part of a cooperative effort by the U.S. Fish and Wildlife Service, Canadian Wildlife Service, Mexico, and the Pacific U.S. states, to estimate the abundance of the Pacific black brant (Branta bernicla nigricans) in their principal wintering areas along the Pacific Coast (in Baja, Mexico, California, Oregon, Washington, British Columbia, and Alaska). The survey is conducted each winter in January-February by a composite of ground and aerial crews, with the Alaska portion being conducted by the Alaska Region of USFWS Migratory Bird Management. The primary objective of the Alaska survey component is to provide an annual index of...
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The Pacific Flyway Winter Brant Survey (WBS) has been conducted annually since 1981 as part of a cooperative effort by the U.S. Fish and Wildlife Service, Canadian Wildlife Service, Mexico, and the Pacific U.S. states, to estimate the abundance of the Pacific black brant (Branta bernicla nigricans) in their principal wintering areas along the Pacific Coast (in Baja, Mexico, California, Oregon, Washington, British Columbia, and Alaska). The survey is conducted each winter in January-February by a composite of ground and aerial crews, with the Alaska portion being conducted by the Alaska Region of USFWS Migratory Bird Management. The primary objective of the Alaska survey component is to provide an annual index of...
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The Pacific Flyway Winter Brant Survey (WBS) has been conducted annually since 1981 as part of a cooperative effort by the U.S. Fish and Wildlife Service, Canadian Wildlife Service, Mexico, and the Pacific U.S. states, to estimate the abundance of the Pacific black brant (Branta bernicla nigricans) in their principal wintering areas along the Pacific Coast (in Baja, Mexico, California, Oregon, Washington, British Columbia, and Alaska). The survey is conducted each winter in January-February by a composite of ground and aerial crews, with the Alaska portion being conducted by the Alaska Region of USFWS Migratory Bird Management. The primary objective of the Alaska survey component is to provide an annual index of...
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The Pacific Flyway Winter Brant Survey (WBS) has been conducted annually since 1981 as part of a cooperative effort by the U.S. Fish and Wildlife Service, Canadian Wildlife Service, Mexico, and the Pacific U.S. states, to estimate the abundance of the Pacific black brant (Branta bernicla nigricans) in their principal wintering areas along the Pacific Coast (in Baja, Mexico, California, Oregon, Washington, British Columbia, and Alaska). The survey is conducted each winter in January-February by a composite of ground and aerial crews, with the Alaska portion being conducted by the Alaska Region of USFWS Migratory Bird Management. The primary objective of the Alaska survey component is to provide an annual index of...
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This R code uses the nest card data (“Nest_Cards_1985_2019_QC.csv”), cumulative observer experience data (“cumnest.csv”), and the output from the detection model to produce nest population estimates for focal species or species groups. Model results used are the the maximum likelihood estimates and covariance matrix from Program Mark for “model 7” or from a Bayesian posterior distribution based on a generalized linear mixed model for detection with random effects for plot, year, and crew. Results from “model 7” are produced only to provide population estimates based on legacy methods as reported in past reports. For final estimates, results from the Bayesian posterior should be used. Result from either model cannot...
Categories: Data, Software; 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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Dusky Canada geese (Branta canadensis occidentalis) comprise one of the smallest populations of geese in North America and their breeding range is limited to Prince William Sound, primarily the Copper River Delta, and Middleton Island, Alaska. The Alaska Region of Migratory Bird Management initiated an aerial breeding pair survey on the Copper River Delta in 1986 after reported declines in the abundance of dusky Canada geese on their nesting and wintering grounds. Since 2008, the Pacific Flyway Council uses results of the aerial breeding pair survey, together with Middleton Island ground counts conducted by the Alaska Department of Fish and Game, as a management index to determine optimal hunting regulations. Survey...
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This data set record the actual length of searched transect within the study area. By design transects extended outside the study area in some case or logistical or mechanical issue prevented all transects from being searched. This record of search effort was re-contrasted from observer track files, field notes, and examination of other data. See the file wrangle_2022.R and comments within for details on reconstructing effort.
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This zip folder contain a set of text files of GPS way point data used to determine nest location, and thus, distance from the transect. These files are used as raw input during the quality control process. See the file wrangle_2022.R for details.
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This is R code used to clean, quality controll and format the distance sampling data used for analysis. Main issues are detailed in comment within the code. Raw data is read in, clean, and formatted for analysis. Major outputs are, Effort_2022.csv, Nest_Distance_QC_2022.csv, Dead_Distance_QC_2022.csv. Input are raw transcribed data from nest cards (NestCards_20221116.csv), waypoint data from three different devices.
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This is a csv file that records the raw transcribed cluster card data from each set of 10 transects that make a “cluster”. This file is used during quality control to produce the final data set. See the code in the file wrangle_2022.R for details.
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This report provides information for the U. S. Fish and Wildlife Service Division of Migratory Bird Management (USFWS DMBM), Alaska Migratory Bird Co-management Council (AMBCC; comprised of the USFWS, Alaska Department of Fish and Game [ADFG], and Alaska Native representatives), Pacific Flyway Council (PFC), and other entities interested in the management, monitoring, and biology of emperor geese. Sport and subsistence hunting of emperor geese was closed in 1986 and 1987, respectively, due to a population decline and conservation concerns. Since the mid-1980s, abundance has increased. During 2012–2015, proposals requesting a legalized harvest have been submitted by Alaska subsistence users through the AMBCC. Past...
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The Pacific Flyway Winter Brant Survey (WBS) has been conducted annually since 1981 as part of a cooperative effort by the U.S. Fish and Wildlife Service, Canadian Wildlife Service, Mexico, and the Pacific U.S. states, to estimate the abundance of the Pacific black brant (Branta bernicla nigricans) in their principal wintering areas along the Pacific Coast (in Baja, Mexico, California, Oregon, Washington, British Columbia, and Alaska). The survey is conducted each winter in January-February by a composite of ground and aerial crews, with the Alaska portion being conducted by the Alaska Region of USFWS Migratory Bird Management. The primary objective of the Alaska survey component is to provide an annual index of...
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SEAK_Nearshore_Survey_Area.gpkg is a geopackage that contains a polygon layer of the survey area for the summer and winter Southeast Alaska Nearshore Waterbird Surveys. All of the shoreline in the layer was surveyed, including rocks and small islets.
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There are four kinds of observers that will be examining photos for birds, and four separate datasheets will contain results from these observers for each survey. The first observer, ‘PRI’ = the primary observer, looks at all photos taken and records bird presence/absence. The ‘SEC’ = the secondary observer, speciates the birds found by the primary observer, and counts the Steller’s eiders. The ‘TER’ = the tertiary observer, reviews the speciation and/or counts of the secondary observer as a check. The ‘ERR’ = the error rate observer, independently records bird presence/absence in a subset (10%) of the photos that the primary observer viewed as a check on the PRI accuracy. When all are complete, they are combined...
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This is a collection of datasets that are comprised final MBM-AK TLSA molting goose aerial survey data. Using R code produced by Brad Shults (files ending in .Rmd found in ‘GitHub_Annual_Report_Code’), these data were produced from the raw survey data (‘raw_data’); some quality control was completed using this GitHub R code, though some columns of these datasets still contain errors and these data are not tidy. However, these data are used to produce figures and tables in annual reports so no further tidying or quality control was conducted for these data. Additional details can be found in entity and domain data dictionary definitions.
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ALPINE/TUNDRA, ANIMALS/VERTEBRATES, ARCTIC TUNDRA, BIOLOGICAL CLASSIFICATION, BIOLOGICAL RECORDS, All tags...
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This dataset was created by Heather Wilson and sent to Julian Fischer on 6/29/21 and forwarded by him to Maggie Harings on 7/1/21. Heather created this document in order to track general survey details including pilot names, observer names, aircraft types used during each survey, and survey notes for the MBM-AK TLSA molting goose surveys. This document has not been tidied and it is unclear whether is has been put through a quality control process. In addition, Heather made several attempts to track down missing information in this document for survey years 1982-1999 but was unsuccessful. Therefore, this document is incomplete and should be treated as such. For additional information regarding this document, please...
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ALPINE/TUNDRA, ANIMALS/VERTEBRATES, ARCTIC TUNDRA, BIOLOGICAL CLASSIFICATION, BIOLOGICAL RECORDS, All tags...
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The Pacific Flyway Winter Brant Survey (WBS) has been conducted annually since 1981 as part of a cooperative effort by the U.S. Fish and Wildlife Service, Canadian Wildlife Service, Mexico, and the Pacific U.S. states, to estimate the abundance of the Pacific black brant (Branta bernicla nigricans) in their principal wintering areas along the Pacific Coast (in Baja, Mexico, California, Oregon, Washington, British Columbia, and Alaska). The survey is conducted each winter in January-February by a composite of ground and aerial crews, with the Alaska portion being conducted by the Alaska Region of USFWS Migratory Bird Management. The primary objective of the Alaska survey component is to provide an annual index of...
map background search result map search result map Analyses of Emperor Goose Survey Data and Harvest Potential Alaska Yukon Delta Nest Plot Survey Study Area Boundary 1998 - current Alaska Izembek Brant Winter Aerial Survey 1981-present Southeast Alaska Nearshore Survey Area 1997-2002 Observer Data Results for Overhead Steller's Eider Survey Teshekpuk Lake Alaska Molting Goose Final Aerial Survey Data Teshekpuk Lake Alaska Molting Goose Observers and Aircraft data Alaska Yukon Delta Line Transect Distance Sampling to Estimate Nest Density on the Yukon-Kuskokwim Delta Alaska Yukon Delta Nest Population Estimation Code Using R Alaska Yukon Delta Nest Population Size and Potential Production of Geese and Spectacled Eiders on the Yukon-Kuskokwim Delta, Alaska, 1985-2016 Alaska Izembek Brant Winter Aerial Survey Report 2014 Alaska Izembek Brant Winter Aerial Survey Report 2013 Alaska Izembek Brant Winter Aerial Survey Report 2021 Alaska Izembek Brant Winter Aerial Survey Report 2010 Alaska Izembek Brant Winter Aerial Survey Report 2012 Alaska Copper River Delta Aerial Dusky Canada Goose Breeding Pair Survey QC Transcribed data Alaska Yukon-Kuskokwim Delta Nesting Waterfowl Distance Sampling Survey 2022 Transect Effort Data Alaska Yukon-Kuskokwim Delta Nesting Waterfowl Distance Sampling Survey 2022 Raw Waypoint Data Alaska Yukon-Kuskokwim Delta Nesting Waterfowl Distance Sampling Survey 2022 Data Wrangling Code Alaska Yukon-Kuskokwim Delta Nesting Waterfowl Distance Sampling Survey 2022 Cluster Card Data Observer Data Results for Overhead Steller's Eider Survey Alaska Yukon-Kuskokwim Delta Nesting Waterfowl Distance Sampling Survey 2022 Transect Effort Data Alaska Yukon-Kuskokwim Delta Nesting Waterfowl Distance Sampling Survey 2022 Raw Waypoint Data Alaska Yukon-Kuskokwim Delta Nesting Waterfowl Distance Sampling Survey 2022 Data Wrangling Code Alaska Yukon-Kuskokwim Delta Nesting Waterfowl Distance Sampling Survey 2022 Cluster Card Data Alaska Copper River Delta Aerial Dusky Canada Goose Breeding Pair Survey QC Transcribed data Alaska Izembek Brant Winter Aerial Survey 1981-present Alaska Izembek Brant Winter Aerial Survey Report 2014 Alaska Izembek Brant Winter Aerial Survey Report 2013 Alaska Izembek Brant Winter Aerial Survey Report 2021 Alaska Izembek Brant Winter Aerial Survey Report 2010 Alaska Izembek Brant Winter Aerial Survey Report 2012 Teshekpuk Lake Alaska Molting Goose Final Aerial Survey Data Teshekpuk Lake Alaska Molting Goose Observers and Aircraft data Alaska Yukon Delta Nest Plot Survey Study Area Boundary 1998 - current Alaska Yukon Delta Line Transect Distance Sampling to Estimate Nest Density on the Yukon-Kuskokwim Delta Alaska Yukon Delta Nest Population Estimation Code Using R Alaska Yukon Delta Nest Population Size and Potential Production of Geese and Spectacled Eiders on the Yukon-Kuskokwim Delta, Alaska, 1985-2016 Southeast Alaska Nearshore Survey Area 1997-2002 Analyses of Emperor Goose Survey Data and Harvest Potential