Data and Model-Based Estimates from Black Brant (Branta bernicla nigricans) Fall Age Ratio Surveys at Izembek Lagoon, Alaska
These data are in three tables relating to fall age ratios (number of juvenile birds : total birds aged) of Black Brant (Branta bernicla nigricans) staging in Izembek Lagoon, Alaska, since 1963. The first table is observation data for the age classes of Black Brant during surveys, and associated survey characteristics. Two tables provide model-based estimates of age ratios by year along with Standard Error (SE), and 95% Bayesian credible intervals around estimates. One table ("baseModel") does not distiguish observer vantage point (land or boat), the other does ("vantageModel").
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "U.S. Geological Survey, Alaska Science Center",
"@type": "vcard:Contact",
"hasEmail": "mailto:gs-ak_asc_datamanagers@usgs.gov"
}
|
| description | These data are in three tables relating to fall age ratios (number of juvenile birds : total birds aged) of Black Brant (Branta bernicla nigricans) staging in Izembek Lagoon, Alaska, since 1963. The first table is observation data for the age classes of Black Brant during surveys, and associated survey characteristics. Two tables provide model-based estimates of age ratios by year along with Standard Error (SE), and 95% Bayesian credible intervals around estimates. One table ("baseModel") does not distiguish observer vantage point (land or boat), the other does ("vantageModel"). |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
"format": "XML",
"accessURL": "https://doi.org/10.5066/P9QIJIU2",
"mediaType": "application/http",
"description": "Landing page for access to the data"
},
{
"@type": "dcat:Distribution",
"title": "Original Metadata",
"format": "XML",
"mediaType": "text/xml",
"description": "The metadata original format",
"downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.ASC256.xml"
}
]
|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_ASC256 |
| keyword |
[
"Alaska",
"Animal populations",
"Animals/Vertebrates",
"Biota",
"Birds",
"Black Brant",
"Branta bernicla nigricans",
"Brent Goose",
"Computational methods",
"Ecological dynamics",
"Environment",
"Izembek Lagoon",
"Izembek National Wildlife Refuge",
"Mathematical modeling",
"Migratory birds",
"Population dynamics",
"Species life history",
"Species/population interactions",
"USGS:ASC256",
"Waterfowl",
"Wildlife biology"
]
|
| modified | 2026-02-13T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -163.14, 55.15, -161.78, 55.42 |
| theme |
[
"Geospatial"
]
|
| title | Data and Model-Based Estimates from Black Brant (Branta bernicla nigricans) Fall Age Ratio Surveys at Izembek Lagoon, Alaska |
