Search

Copyright of Condor is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Presents a study that compared the nesting ecology of barrow's goldeneye and bufflehead in natural cavities in the Cariboo Parklands in British Columbia. Analysis of the physical characteristics of the nest sites; Examination of the clutch sizes of the two birds; Investigation of the sources of predation in the nest sites.

Presents a study that applied several techniques to examine the chronology and synchrony of breeding events of the marbled murrelet population at Desolation Sound, British Columbia. Estimation of the duration of breeding by marbled murrelets; Comparison of several methods to estimate breeding chronology; Examination of the interannual variability of the breeding behavior of marbled murrelets; Analysis of the breeding synchrony of marbled murrelets.

Presents information a study that estimated the fecundity of marbled murrelets. Estimation of the local survival of hatch year birds after fledging and after-hatch-year birds during incubation and early chick rearing; Calculation of juvenile ratios using hatch year counts corrected for juvenile emigration and after-hatch-year counts at the peak of the breeding season; Comparison of the juvenile ratios to traditional ratios and other measures of fecundity.

Presents a study that reported a significant male bias in dawn and dusk nest visitations of breeding by radio-marked marbled murrelets during the chick rearing period in Desolation Sound, British Columbia, Canada, from 1998-2000. Methodology; Radio-tracking; Statistical analysis.

Presents information on a study which investigated the types of decisions made by Harlequin Ducks in moving between nearshore feeding and offshore resting areas. Methodology; Results and discussion.

Presents evidence that Harlequin duck broods accompany their mothers from breeding streams to coastal molting or wintering areas, according to a study conducted in southwestern Alberta. Importance of timing of brood abandonment; Number of Harlequin duck families observed at the wintering areas; Implications of the arrival of entire families at wintering areas to population genetic structure, demographics and conservation.

Presents information on a study that investigated the timing, duration, and rate of wing molt of male Barrow's Goldeneye. Health requirement of waterfowls during its postbreeding period; Methodology; Results and discussion.

Presents information on a study that documented the frequency of pair reunions in Harlequin Ducks on breeding streams in Alberta and a molting/wintering area in southwestern British Columbia. Methodology; Results and discussion; Why males should attempt to reunite with their previous mates.

Provides information on a study that examined a population of individually marked Harlequin Ducks at White Rock, British Columbia. Considerations in expecting population genetic differentiation among birds which pair away from breeding grounds during the winter months; Methodology; Results and discussion.

Focuses on a study which examined the seasonal movements of Marbled Murrelets or Brachyrampus marmoratus through systemic banding programs. Banding of birds with stainless steel leg bands in Theodosia Inlet, part of Desolation Sound, British Columbia; Examination of published papers and reports related to banding of Marbled Murrelets; Direct evidence of the migration between breeding and nonbreeding areas.

Presents a study which documented the chronology of pair formation in a population of wintering Harlequin Ducks, in southwestern British Columbia. Methods used to conduct the study; When pair bonds are formed in migratory bird species; Results of the study.

Describes the plumage changes of male harlequin ducks. Timing of molt; Chronology of returning of male harlequin ducks; Function of drab basic plumage; Intra-sexual competition among males to assess the quality of rival males.