Effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird
Summary Heterogeneity in individual quality (i.e. individuals having different performance levels that are consistent throughout life) can drive the demography of iteroparous species, but quality in the context of environmental variability has rarely been evaluated. We investigated the demographic r...
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crwiley:10.1111/j.1365-2656.2009.01542.x 2024-06-23T07:56:21+00:00 Effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird Lescroël, Amélie Dugger, Katie M. Ballard, Grant Ainley, David G. 2009 http://dx.doi.org/10.1111/j.1365-2656.2009.01542.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2656.2009.01542.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2656.2009.01542.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Animal Ecology volume 78, issue 4, page 798-806 ISSN 0021-8790 1365-2656 journal-article 2009 crwiley https://doi.org/10.1111/j.1365-2656.2009.01542.x 2024-06-11T04:40:16Z Summary Heterogeneity in individual quality (i.e. individuals having different performance levels that are consistent throughout life) can drive the demography of iteroparous species, but quality in the context of environmental variability has rarely been evaluated. We investigated the demographic responses of a long‐lived seabird, the Adélie penguin ( Pygoscelis adeliae ), to contrasting environmental conditions as a function of reproductive success, breeding quality (BQ) and experience. A continuous index of BQ (BQI) was developed to reflect an individual's ability, relative to others, to produce viable offspring. First, we assessed the relative importance of costs of reproduction vs. heterogeneity in quality by comparing survival and reproductive probabilities among deferred, successful and unsuccessful breeders under ‘demanding’ conditions using multistate capture–mark–recapture modelling. Then, we quantified the influence of BQI on adult survival among experienced breeders vs. the whole study population under both ‘normal’ and ‘demanding’ conditions. Higher survival rates were exhibited by successful (74–76%) compared to unsuccessful breeders (64%); the former also more frequently reproduced successfully at year t + 1. From 1997 to 2006, adult survival ranged from 64–79%, with BQI accounting for 91% of variability in the entire study population, but only 17% in experienced breeders. The weakened relationship between BQI and survival in experienced breeders supports the theory that selection during the first reproductive event accounts for a more homogeneous pool of experienced breeders. No significant effect of environmental covariates on survival was evident, suggesting that what appeared to be demanding conditions were within the range that could be buffered by this species. For the first time in seabirds, a quadratic relationship between adult survival and BQI showed that adult survival is shaped by both heterogeneity in quality and reproductive costs. Our study confirms that population demographic ... Article in Journal/Newspaper Pygoscelis adeliae Wiley Online Library Journal of Animal Ecology 78 4 798 806 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary Heterogeneity in individual quality (i.e. individuals having different performance levels that are consistent throughout life) can drive the demography of iteroparous species, but quality in the context of environmental variability has rarely been evaluated. We investigated the demographic responses of a long‐lived seabird, the Adélie penguin ( Pygoscelis adeliae ), to contrasting environmental conditions as a function of reproductive success, breeding quality (BQ) and experience. A continuous index of BQ (BQI) was developed to reflect an individual's ability, relative to others, to produce viable offspring. First, we assessed the relative importance of costs of reproduction vs. heterogeneity in quality by comparing survival and reproductive probabilities among deferred, successful and unsuccessful breeders under ‘demanding’ conditions using multistate capture–mark–recapture modelling. Then, we quantified the influence of BQI on adult survival among experienced breeders vs. the whole study population under both ‘normal’ and ‘demanding’ conditions. Higher survival rates were exhibited by successful (74–76%) compared to unsuccessful breeders (64%); the former also more frequently reproduced successfully at year t + 1. From 1997 to 2006, adult survival ranged from 64–79%, with BQI accounting for 91% of variability in the entire study population, but only 17% in experienced breeders. The weakened relationship between BQI and survival in experienced breeders supports the theory that selection during the first reproductive event accounts for a more homogeneous pool of experienced breeders. No significant effect of environmental covariates on survival was evident, suggesting that what appeared to be demanding conditions were within the range that could be buffered by this species. For the first time in seabirds, a quadratic relationship between adult survival and BQI showed that adult survival is shaped by both heterogeneity in quality and reproductive costs. Our study confirms that population demographic ... |
format |
Article in Journal/Newspaper |
author |
Lescroël, Amélie Dugger, Katie M. Ballard, Grant Ainley, David G. |
spellingShingle |
Lescroël, Amélie Dugger, Katie M. Ballard, Grant Ainley, David G. Effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird |
author_facet |
Lescroël, Amélie Dugger, Katie M. Ballard, Grant Ainley, David G. |
author_sort |
Lescroël, Amélie |
title |
Effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird |
title_short |
Effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird |
title_full |
Effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird |
title_fullStr |
Effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird |
title_full_unstemmed |
Effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird |
title_sort |
effects of individual quality, reproductive success and environmental variability on survival of a long‐lived seabird |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1365-2656.2009.01542.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2656.2009.01542.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2656.2009.01542.x |
genre |
Pygoscelis adeliae |
genre_facet |
Pygoscelis adeliae |
op_source |
Journal of Animal Ecology volume 78, issue 4, page 798-806 ISSN 0021-8790 1365-2656 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2656.2009.01542.x |
container_title |
Journal of Animal Ecology |
container_volume |
78 |
container_issue |
4 |
container_start_page |
798 |
op_container_end_page |
806 |
_version_ |
1802649380101029888 |