| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Starting with a handicap: phenotypic differences between early- and late-born king penguin chicks and their survival correlates
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| Autores: |
Stier, Antoine
Viblanc, Vincent A.
Massemin-challet, Sylvie
Handrich, Yves
Zahn, Sandrine
Rojas, Emilio R.
Saraux, Claire
Le Vaillant, Maryline
Prud'Homme, Onesime
Grosbellet, Edith
Robin, Jean-patrice
Bize, Pierre
Criscuolo, Francois
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| Data: |
2014-06
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| Ano: |
2014
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| Palavras-chave: |
Early-life conditions
Phenotypic plasticity
Oxidative stress
Individual quality
Growth
Telomere
Corticosterone
Reproductive timing
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| Resumo: |
1. The exceptionally long (c. 11 months) growth period of king penguin chicks (Aptenodytes patagonicus) is interrupted by the Austral winter. As a consequence, penguin chicks born late in the breeding season have little time to build-up their energy reserves before the drastic energy bottleneck they experience during winter and face greater risks of mortality than early-born chicks. 2. Whereas it is well known that breeding adults alternate between early- and late-breeding attempts, little is known on the phenotype of early- and late-chicks, and on the potential existence of specific adaptive phenotypic responses in late-born individuals. 3. We investigated phenotypic differences between early- and late-chicks and tested their survival correlates both before the winter and at fledgling. Chicks were sampled 10 days after hatching to measure body mass, plasma corticosterone levels, oxidative stress parameters and telomere length. 4. Late-chicks were heavier than early-chicks at day 10. Late-chicks also had higher corticosterone and oxidative stress levels, shorter telomere lengths and suffered from higher mortality rates than early-chicks. For both early- and late-chicks, high body mass close to hatching was a strong predictor of survival up to, and over, the winter period. 5. In late but not early-chicks, high corticosterone levels and long telomeres were significant predictors of survival up to winter and fledging, respectively. 6. Our study provides evidence that late- and early-king penguin chicks showed marked phenotypic differences 10 days after hatching. We provide an integrative discussion on whether these differences may be adaptive or not, and to what extent they may be driven by active maternal effects, indirectly induced by environmental effects, or stem from individual differences in parental quality.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00170/28175/32107.pdf
DOI:10.1111/1365-2435.12204
http://archimer.ifremer.fr/doc/00170/28175/
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| Editor: |
Wiley-blackwell
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| Formato: |
application/pdf
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| Fonte: |
Functional Ecology (0269-8463) (Wiley-blackwell), 2014-06 , Vol. 28 , N. 3 , P. 601-611
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| Direitos: |
2013 The Authors. Functional Ecology © 2013 British Ecological Society
info:eu-repo/semantics/openAccess
restricted use
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