Population dynamics of white-winged scoters
Journal of Wildlife Management
By: D.G. Krementz, P.W. Brown, F.P. Kehoe, and C.S. Houston
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Abstract
A significant (P < 0.01) decline between 1961 and 1993 in ratio of harvested young per adult in the Atlantic Flyway (age ration) of white-winged scoters (Melanitta fusca) led us to examine annual survival rates and harvest of this species. Compared to waterfowl with similar life histories, black scoters (M. nigra) and surf scoters (M. perspicillata), the decline in age ratios of white-winged scoter age ratios was not significantly different (P = 0.11). Adult females banded at Redberry Lake, Saskatchewan that winter along both coasts, had high annual survival rates (0.773 plus or minus 0.0176 [SE]). High harvest in the Atlantic Flyway was not followed by an increase in production (age ratios) the following year or 2, i.e., there was no short-term rebound in recruitment by the population. Harvest of white-winged scoters in the Atlantic Flyway was explained by the age ratio in the fall flight and by hunter effort.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Population dynamics of white-winged scoters |
| Series title | Journal of Wildlife Management |
| Volume | 61 |
| Issue | 1 |
| Year Published | 1997 |
| Language | English |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 222-227 |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Wildlife Management |
| First page | 222 |
| Last page | 227 |
| Google Analytic Metrics | Metrics page |