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Population dynamics of white-winged scoters

Journal of Wildlife Management

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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.

Additional Publication Details

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