Data and Model-based Estimates from Black Brant (Branta bernicla nigricans) Fall Age Ratio Surveys at Izembek Lagoon, Alaska ...

These data are in two 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 file is observation data for the birds' age classes during surveys and associated survey char...

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Bibliographic Details
Main Authors: Vijay P Patil, Courtney L Amundson, David H Ward, Alison R Williams
Format: Dataset
Language:unknown
Published: U.S. Geological Survey 2020
Subjects:
wildlife biology
population dynamics
black brant
species life history
izembek national wildlife refuge
computational methods
brent goose
mathematical modeling
animal populations
Animals/Vertebrates
Birds
Migratory birds
Waterfowl
Alaska
Branta bernicla nigricans
Izembek National Wildlife Refuge
Species/population interactions
Izembek Lagoon
Branta bernicla
Brent goose
Online Access:https://dx.doi.org/10.5066/p9qijiu2
https://www.usgs.gov/centers/asc/science/pacific-brant-age-ratios
Description
Summary:These data are in two 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 file is observation data for the birds' age classes during surveys and associated survey characteristics. The second file contains model-based estimates of age ratios by year along with SE, and 95% Bayesian credible intervals around estimates. ...

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