Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird
The environment experienced during development is a key factor determining intraspecific variation in postnatal growth. In sexually size-dimorphic species, the larger sex typically grows at a higher absolute rate and consequently is more sensitive or vulnerable to restrictive environments. In additi...
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ftconicet:oai:ri.conicet.gov.ar:11336/163611 2023-10-09T21:52:54+02:00 Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird Svagelj, Walter Sergio Gómez Laich, Agustina Marta Pérez, María Rita Somoza, Gustavo Manuel Quintana, Flavio Roberto application/pdf http://hdl.handle.net/11336/163611 eng eng Wiley Blackwell Publishing, Inc info:eu-repo/semantics/altIdentifier/doi/10.1111/ibi.12920 http://hdl.handle.net/11336/163611 Svagelj, Walter Sergio; Gómez Laich, Agustina Marta; Pérez, María Rita; Somoza, Gustavo Manuel; Quintana, Flavio Roberto; Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird; Wiley Blackwell Publishing, Inc; Ibis; 163; 3; 12-2020; 1032-1044 0019-1019 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ FLEDGING MASS IMPERIAL SHAG LEUCOCARBO ATRICEPS NON-LINEAR MIXED MODELS OFFSPRING VULNERABILITY https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1111/ibi.12920 2023-09-24T19:12:19Z The environment experienced during development is a key factor determining intraspecific variation in postnatal growth. In sexually size-dimorphic species, the larger sex typically grows at a higher absolute rate and consequently is more sensitive or vulnerable to restrictive environments. In addition, this sensitivity can be intrinsic when it is caused by physiological disadvantages of the larger sex, or extrinsic when it results from environments generated by social interactions among siblings. Here, we evaluated intrinsic and extrinsic drivers of sex-specific sensitivity in the postnatal growth of the Imperial Shag Leucocarbo atriceps, a sexually dimorphic seabird that typically produces one- or two-fledgling broods. Our objectives were to evaluate sex-specific effects of: (1) good and poor years on chicks fledging as singletons, (2) different rearing environments produced by the combinations of brood size and hatching order, and (3) sibling sex and brood sex composition in two-fledgling broods. Singletons exhibited suboptimal growth in poor years, with males and females equally affected. At an extrinsic level, males were more sensitive than females, as the reduction in fledging mass between best and worst social environments was twice as high in males as in females. In addition, the presence of a younger sibling in the nest had sex-specific consequences for the older chick. Fledging mass of older female chicks was unaffected by the presence of a younger sibling, whereas males reached the highest fledging mass when raised as singletons. The sex of the sibling and the brood sex composition did not affect chick growth in two-chick broods. Overall, our results suggest that females grow at their maximum rate even in moderately favourable social environments (as senior chicks in two-chick broods), whereas males require the most favourable environment (raised as singletons) to reach the highest growth. Fil: Svagelj, Walter Sergio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico ... Article in Journal/Newspaper Imperial Shag CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Ibis 163 3 1032 1044 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
topic |
FLEDGING MASS IMPERIAL SHAG LEUCOCARBO ATRICEPS NON-LINEAR MIXED MODELS OFFSPRING VULNERABILITY https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
FLEDGING MASS IMPERIAL SHAG LEUCOCARBO ATRICEPS NON-LINEAR MIXED MODELS OFFSPRING VULNERABILITY https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Svagelj, Walter Sergio Gómez Laich, Agustina Marta Pérez, María Rita Somoza, Gustavo Manuel Quintana, Flavio Roberto Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird |
topic_facet |
FLEDGING MASS IMPERIAL SHAG LEUCOCARBO ATRICEPS NON-LINEAR MIXED MODELS OFFSPRING VULNERABILITY https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The environment experienced during development is a key factor determining intraspecific variation in postnatal growth. In sexually size-dimorphic species, the larger sex typically grows at a higher absolute rate and consequently is more sensitive or vulnerable to restrictive environments. In addition, this sensitivity can be intrinsic when it is caused by physiological disadvantages of the larger sex, or extrinsic when it results from environments generated by social interactions among siblings. Here, we evaluated intrinsic and extrinsic drivers of sex-specific sensitivity in the postnatal growth of the Imperial Shag Leucocarbo atriceps, a sexually dimorphic seabird that typically produces one- or two-fledgling broods. Our objectives were to evaluate sex-specific effects of: (1) good and poor years on chicks fledging as singletons, (2) different rearing environments produced by the combinations of brood size and hatching order, and (3) sibling sex and brood sex composition in two-fledgling broods. Singletons exhibited suboptimal growth in poor years, with males and females equally affected. At an extrinsic level, males were more sensitive than females, as the reduction in fledging mass between best and worst social environments was twice as high in males as in females. In addition, the presence of a younger sibling in the nest had sex-specific consequences for the older chick. Fledging mass of older female chicks was unaffected by the presence of a younger sibling, whereas males reached the highest fledging mass when raised as singletons. The sex of the sibling and the brood sex composition did not affect chick growth in two-chick broods. Overall, our results suggest that females grow at their maximum rate even in moderately favourable social environments (as senior chicks in two-chick broods), whereas males require the most favourable environment (raised as singletons) to reach the highest growth. Fil: Svagelj, Walter Sergio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico ... |
format |
Article in Journal/Newspaper |
author |
Svagelj, Walter Sergio Gómez Laich, Agustina Marta Pérez, María Rita Somoza, Gustavo Manuel Quintana, Flavio Roberto |
author_facet |
Svagelj, Walter Sergio Gómez Laich, Agustina Marta Pérez, María Rita Somoza, Gustavo Manuel Quintana, Flavio Roberto |
author_sort |
Svagelj, Walter Sergio |
title |
Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird |
title_short |
Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird |
title_full |
Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird |
title_fullStr |
Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird |
title_full_unstemmed |
Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird |
title_sort |
sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird |
publisher |
Wiley Blackwell Publishing, Inc |
url |
http://hdl.handle.net/11336/163611 |
genre |
Imperial Shag |
genre_facet |
Imperial Shag |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/ibi.12920 http://hdl.handle.net/11336/163611 Svagelj, Walter Sergio; Gómez Laich, Agustina Marta; Pérez, María Rita; Somoza, Gustavo Manuel; Quintana, Flavio Roberto; Sex-specific environmental sensitivity on the postnatal growth of a sexually size-dimorphic seabird; Wiley Blackwell Publishing, Inc; Ibis; 163; 3; 12-2020; 1032-1044 0019-1019 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1111/ibi.12920 |
container_title |
Ibis |
container_volume |
163 |
container_issue |
3 |
container_start_page |
1032 |
op_container_end_page |
1044 |
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1779316102288900096 |