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Abstract
We summarize current knowledge about the distribution of Pacific Black Brant and recent dynamics of colonies, particularly on the Yukon-Kuskokwim (Y-K) Delta, Alaska. About 20,000 nests are required to produce the number of young in the autumn flight using estimates of clutch size, hatching success and gosling survival based on colonies on the Y-K Delta. More than 80% of the nests in the population can be accounted for currently on the Y-K Delta. Most moulting individuals that did not breed, or were unsuccessful, are unaccounted for in late summer. Numbers of Black Brant nesting in major colonies on the Y-K Delta declined >60% in the early 1980s, most likely as a result of local subsistence harvest combined with predation by arctic foxes. Effective management of this population requires a better understanding of the distribution of breeding and moulting birds, the importance of breeding habitat to colony dynamics and the role of both sport and subsistence harvest in population dynamics.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Current status and recent dynamics of the Black Brant Branta bernicla breeding population |
| Series title | Wildfowl |
| Volume | 44 |
| Year Published | 1993 |
| Language | English |
| Publisher | Wildfowl & Wetlands Trust |
| Contributing office(s) | Alaska Science Center |
| Description | 10 p. |
| First page | 39 |
| Last page | 48 |
| Country | Canada, United States |
| Google Analytic Metrics | Metrics page |