Within‐ and between‐year variation in the juvenile survival of Common Guillemots Uria aalge
We studied juvenile survival of 20 cohorts of Common Guillemot Uria aalge chicks colour‐ringed on the Isle of May, Scotland, using both live observations at the colony and dead recoveries, allowing estimation of fidelity to the colony as well as survival. In this seabird, chicks leave the colony whe...
Published in: | Ibis |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2007
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1474-919x.2007.00667.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.2007.00667.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.2007.00667.x |
id |
crwiley:10.1111/j.1474-919x.2007.00667.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1474-919x.2007.00667.x 2024-09-09T19:36:52+00:00 Within‐ and between‐year variation in the juvenile survival of Common Guillemots Uria aalge HARRIS, MICHAEL P. FREDERIKSEN, MORTEN WANLESS, SARAH 2007 http://dx.doi.org/10.1111/j.1474-919x.2007.00667.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.2007.00667.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.2007.00667.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 149, issue 3, page 472-481 ISSN 0019-1019 1474-919X journal-article 2007 crwiley https://doi.org/10.1111/j.1474-919x.2007.00667.x 2024-07-02T04:11:50Z We studied juvenile survival of 20 cohorts of Common Guillemot Uria aalge chicks colour‐ringed on the Isle of May, Scotland, using both live observations at the colony and dead recoveries, allowing estimation of fidelity to the colony as well as survival. In this seabird, chicks leave the colony when only partly grown and are cared for by the male parent for several weeks afterwards. First‐year survival varied strongly between cohorts, with a mean of 56% (range 30–91%). We did not identify any covariates which could explain this variation, whether relating to climate, population size or prey density. Survival was low during two regime shift episodes in the North Sea (1987–90 and 2000 onwards). Early hatched chicks were substantially more likely to survive than those hatching later in most years, whereas body condition at ringing had no detectable effect. Ringing recoveries indicated that mortality was highest in mid‐winter, i.e. well after the cessation of paternal care. These results do not support the hypothesis that variation in prey quantity or energy content before fledging is a primary driver of variation in juvenile survival. Rather, it seems that chicks of high‐quality parents are more likely to survive, as high‐quality females tend to lay earlier in the season, and high‐quality males presumably are better able to prepare their chicks to survive their first winter at sea. Very few (4%) Guillemots emigrated permanently before age 3 years, but from age 5 onwards 25–30% of birds annually left the colony or otherwise became unobservable. Article in Journal/Newspaper common guillemot Uria aalge uria Wiley Online Library Ibis 149 3 472 481 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
We studied juvenile survival of 20 cohorts of Common Guillemot Uria aalge chicks colour‐ringed on the Isle of May, Scotland, using both live observations at the colony and dead recoveries, allowing estimation of fidelity to the colony as well as survival. In this seabird, chicks leave the colony when only partly grown and are cared for by the male parent for several weeks afterwards. First‐year survival varied strongly between cohorts, with a mean of 56% (range 30–91%). We did not identify any covariates which could explain this variation, whether relating to climate, population size or prey density. Survival was low during two regime shift episodes in the North Sea (1987–90 and 2000 onwards). Early hatched chicks were substantially more likely to survive than those hatching later in most years, whereas body condition at ringing had no detectable effect. Ringing recoveries indicated that mortality was highest in mid‐winter, i.e. well after the cessation of paternal care. These results do not support the hypothesis that variation in prey quantity or energy content before fledging is a primary driver of variation in juvenile survival. Rather, it seems that chicks of high‐quality parents are more likely to survive, as high‐quality females tend to lay earlier in the season, and high‐quality males presumably are better able to prepare their chicks to survive their first winter at sea. Very few (4%) Guillemots emigrated permanently before age 3 years, but from age 5 onwards 25–30% of birds annually left the colony or otherwise became unobservable. |
format |
Article in Journal/Newspaper |
author |
HARRIS, MICHAEL P. FREDERIKSEN, MORTEN WANLESS, SARAH |
spellingShingle |
HARRIS, MICHAEL P. FREDERIKSEN, MORTEN WANLESS, SARAH Within‐ and between‐year variation in the juvenile survival of Common Guillemots Uria aalge |
author_facet |
HARRIS, MICHAEL P. FREDERIKSEN, MORTEN WANLESS, SARAH |
author_sort |
HARRIS, MICHAEL P. |
title |
Within‐ and between‐year variation in the juvenile survival of Common Guillemots Uria aalge |
title_short |
Within‐ and between‐year variation in the juvenile survival of Common Guillemots Uria aalge |
title_full |
Within‐ and between‐year variation in the juvenile survival of Common Guillemots Uria aalge |
title_fullStr |
Within‐ and between‐year variation in the juvenile survival of Common Guillemots Uria aalge |
title_full_unstemmed |
Within‐ and between‐year variation in the juvenile survival of Common Guillemots Uria aalge |
title_sort |
within‐ and between‐year variation in the juvenile survival of common guillemots uria aalge |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1474-919x.2007.00667.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.2007.00667.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.2007.00667.x |
genre |
common guillemot Uria aalge uria |
genre_facet |
common guillemot Uria aalge uria |
op_source |
Ibis volume 149, issue 3, page 472-481 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1474-919x.2007.00667.x |
container_title |
Ibis |
container_volume |
149 |
container_issue |
3 |
container_start_page |
472 |
op_container_end_page |
481 |
_version_ |
1809906007217799168 |