P.W. Brown
F.P. Kehoe
C.S. Houston
David G. Krementz
1997
<p>A significant (<i>P</i> < 0.01) decline between 1961 and 1993 in ratio of harvested young per adult in the Atlantic Flyway (age ration) of white-winged scoters (<i>Melanitta fusca</i>) led us to examine annual survival rates and harvest of this species. Compared to waterfowl with similar life histories, black scoters (<i>M. nigra</i>) and surf scoters (<i>M. perspicillata</i>), the decline in age ratios of white-winged scoter age ratios was not significantly different (<i>P</i> = 0.11). Adult females banded at Redberry Lake, Saskatchewan that winter along both coasts, had high annual survival rates (0.773 <span>±</span> 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.</p>
application/pdf
10.2307/3802431
en
Wiley
Population dynamics of white-winged scoters
article