Regional and annual variability in common eider nesting ecology in Labrador
Nesting densities are often used to estimate breeding population size and with other measures of reproductive performance can be useful indicators of population status. These aspects of breeding biology often show considerable spatial and temporal variation. Between 2000 and 2003, we surveyed nestin...
Published in: | Polar Research |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Norwegian Polar Institute
2004
|
Subjects: | |
Online Access: | https://polarresearch.net/index.php/polar/article/view/2080 https://doi.org/10.3402/polar.v23i2.6273 |
id |
ftjpolarres:oai:journals.openacademia.net:article/2080 |
---|---|
record_format |
openpolar |
spelling |
ftjpolarres:oai:journals.openacademia.net:article/2080 2024-09-15T18:02:41+00:00 Regional and annual variability in common eider nesting ecology in Labrador Chaulk, Keith G. Robertson, Gregory J. Montevecchi, William A. 2004-12-01 application/pdf https://polarresearch.net/index.php/polar/article/view/2080 https://doi.org/10.3402/polar.v23i2.6273 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2080/5331 https://polarresearch.net/index.php/polar/article/view/2080 doi:10.3402/polar.v23i2.6273 Polar Research; Vol. 23 No. 2 (2004); 121-130 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2004 ftjpolarres https://doi.org/10.3402/polar.v23i2.6273 2024-06-28T03:10:15Z Nesting densities are often used to estimate breeding population size and with other measures of reproductive performance can be useful indicators of population status. These aspects of breeding biology often show considerable spatial and temporal variation. Between 2000 and 2003, we surveyed nesting common eiders (Somateria mollissima) on 172 islands in three archipelagos (Nain, Hopedale, Rigolet) on the Labrador coast. Rigolet was the largest archipelago (2834 km2) followed by Nain then Hopedale, and island density varied inversely with archipelago size. Overall means were: nest density 52.0 ± 141.9 (SD) nests/ha; nest initiation 12 June ± 12 days; clutch size 3.7 ± 1.2 eggs/nest; egg volume 98.8 ± 10.4 cm3; and clutch volume 392.3 ± 135.0 cm3. Rigolet had the highest average egg volumes and nest densities, the highest single island nest density of 1053 nests/ha, and the earliest average nest initiation date. We found significant differences in nest densities among archipelagos and across years; significant archipelago and year interactions were detected for nest initiation date and clutch size. Significant differences were found among individual islands for all response variables except egg volume. For egg volume, within-archipelago island differences were not significant, but between-archipelago differences were significant. Thus egg volume may be a useful diagnostic to identify population affiliation. Article in Journal/Newspaper Common Eider Hopedale Nain Polar Research Rigolet Somateria mollissima Single Island Polar Research Polar Research 23 2 121 130 |
institution |
Open Polar |
collection |
Polar Research |
op_collection_id |
ftjpolarres |
language |
English |
description |
Nesting densities are often used to estimate breeding population size and with other measures of reproductive performance can be useful indicators of population status. These aspects of breeding biology often show considerable spatial and temporal variation. Between 2000 and 2003, we surveyed nesting common eiders (Somateria mollissima) on 172 islands in three archipelagos (Nain, Hopedale, Rigolet) on the Labrador coast. Rigolet was the largest archipelago (2834 km2) followed by Nain then Hopedale, and island density varied inversely with archipelago size. Overall means were: nest density 52.0 ± 141.9 (SD) nests/ha; nest initiation 12 June ± 12 days; clutch size 3.7 ± 1.2 eggs/nest; egg volume 98.8 ± 10.4 cm3; and clutch volume 392.3 ± 135.0 cm3. Rigolet had the highest average egg volumes and nest densities, the highest single island nest density of 1053 nests/ha, and the earliest average nest initiation date. We found significant differences in nest densities among archipelagos and across years; significant archipelago and year interactions were detected for nest initiation date and clutch size. Significant differences were found among individual islands for all response variables except egg volume. For egg volume, within-archipelago island differences were not significant, but between-archipelago differences were significant. Thus egg volume may be a useful diagnostic to identify population affiliation. |
format |
Article in Journal/Newspaper |
author |
Chaulk, Keith G. Robertson, Gregory J. Montevecchi, William A. |
spellingShingle |
Chaulk, Keith G. Robertson, Gregory J. Montevecchi, William A. Regional and annual variability in common eider nesting ecology in Labrador |
author_facet |
Chaulk, Keith G. Robertson, Gregory J. Montevecchi, William A. |
author_sort |
Chaulk, Keith G. |
title |
Regional and annual variability in common eider nesting ecology in Labrador |
title_short |
Regional and annual variability in common eider nesting ecology in Labrador |
title_full |
Regional and annual variability in common eider nesting ecology in Labrador |
title_fullStr |
Regional and annual variability in common eider nesting ecology in Labrador |
title_full_unstemmed |
Regional and annual variability in common eider nesting ecology in Labrador |
title_sort |
regional and annual variability in common eider nesting ecology in labrador |
publisher |
Norwegian Polar Institute |
publishDate |
2004 |
url |
https://polarresearch.net/index.php/polar/article/view/2080 https://doi.org/10.3402/polar.v23i2.6273 |
genre |
Common Eider Hopedale Nain Polar Research Rigolet Somateria mollissima Single Island |
genre_facet |
Common Eider Hopedale Nain Polar Research Rigolet Somateria mollissima Single Island |
op_source |
Polar Research; Vol. 23 No. 2 (2004); 121-130 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2080/5331 https://polarresearch.net/index.php/polar/article/view/2080 doi:10.3402/polar.v23i2.6273 |
op_doi |
https://doi.org/10.3402/polar.v23i2.6273 |
container_title |
Polar Research |
container_volume |
23 |
container_issue |
2 |
container_start_page |
121 |
op_container_end_page |
130 |
_version_ |
1810440117422129152 |