Reproductive ecology of Emperor Geese: annual and individual variation in nesting
Article Abstract:
Variation in the nesting behavior of female Emperor Geese (Chen canagicus) was studied in Alaska to improve knowledge on its nesting ecology. Individual geese arrived and initiated nesting at about the same time each year. The most common clutch size was four to six eggs, but clutch size varied among individuals and among years. Nesting success was affected mainly by predators and ranged from 90.6% in 1982 to 0.1% in 1986. Adult female geese sometimes forego nesting due to unfavorable physiological conditions or to loss of mate and subsequent re-pairing.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1992
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Reproductive ecology of Emperor Geese: survival of adult females
Article Abstract:
Increased reproductive effort is assumed by life history theories to be coupled with decreased survival. This assumption was tested by studying the nesting success and survival of female Emperor Geese (Chen canagicus). No significant correlation was found between survival and seven measures of nesting success except for attempt to nest the previous season. The higher probability of survival among non-nesting females may be due to hunting pressure in the nesting areas. A positive correlation between large clutch size and survival was also seen.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1992
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Use of implanted satellite transmitters to locate Spectacled Eiders at-sea
Article Abstract:
A study of the utility of satellite telemetry in spotting at-sea areas frequented by Spectacled Eiders revealed the versatility of this sophisticated technique in locating the Eider, which is listed as a rare bird by the Endangered Species Act. Implanated satellite transmitters are of great use in assessing nesting habits and various features causing the depletion in the Spectacled Eiders population.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1995
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