Nathan D Chelgren
I am a Wildlife Biologist at the USGS Forest and Rangeland Ecosystem Science Center
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 26
Life-history implications of large-scale spatial variation in adult survival of black brant (Branta bernicla nigricans)
We used capture-recapture methods to estimate adult survival rates for adult female Black Brant (Branta bernicla nigricans; hereafter “brant”) from three colonies in Alaska, two on the Yukon-Kuskokwim Delta, and one on Alaska's Arctic coast. Costs of migration and reproductive effort varied among those colonies, enabling us to examine variation in survival in relation to variation in these other v
Authors
James S. Sedinger, Nathan Chelgren, Mark S. Lindberg, Tim Obritchkewitch, Morgan T. Kirk, Philip D. Martin, Betty A. Anderson, David H. Ward
Testing for handling bias in survival estimation for black brant
We used an ultrastructure approach in program SURVIV to test for, and remove, bias in survival estimates for the year following mass banding of female black brant (Branta bernicla nigricans). We used relative banding-drive size as the independent variable to control for handling effects in our ultrastructure models, which took the form: S = S0(1 - ??D), where ?? was handling effect and D was the r
Authors
J.S. Sedinger, M. S. Lindberg, E.A. Rexstad, N.D. Chelgren, David H. Ward
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 26
Life-history implications of large-scale spatial variation in adult survival of black brant (Branta bernicla nigricans)
We used capture-recapture methods to estimate adult survival rates for adult female Black Brant (Branta bernicla nigricans; hereafter “brant”) from three colonies in Alaska, two on the Yukon-Kuskokwim Delta, and one on Alaska's Arctic coast. Costs of migration and reproductive effort varied among those colonies, enabling us to examine variation in survival in relation to variation in these other v
Authors
James S. Sedinger, Nathan Chelgren, Mark S. Lindberg, Tim Obritchkewitch, Morgan T. Kirk, Philip D. Martin, Betty A. Anderson, David H. Ward
Testing for handling bias in survival estimation for black brant
We used an ultrastructure approach in program SURVIV to test for, and remove, bias in survival estimates for the year following mass banding of female black brant (Branta bernicla nigricans). We used relative banding-drive size as the independent variable to control for handling effects in our ultrastructure models, which took the form: S = S0(1 - ??D), where ?? was handling effect and D was the r
Authors
J.S. Sedinger, M. S. Lindberg, E.A. Rexstad, N.D. Chelgren, David H. Ward