From early-life to senescence: individual heterogeneity in a long-lived seabird
International audience Although population studies have long assumed that all individuals of a givensex and age are identical, ignoring among-individual differences may strongly bias our perceptionof eco-evolutionary processes. Individual heterogeneity, often referred to as individualquality, has re...
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ftunivrochelle:oai:HAL:hal-01515413v1 2024-02-11T10:03:20+01:00 From early-life to senescence: individual heterogeneity in a long-lived seabird Fay, Rémi Barbraud, Christophe Delord, Karine Weimerskirch, Henri Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) 2018 https://hal.science/hal-01515413 https://doi.org/10.1002/ecm.1275 en eng HAL CCSD Ecological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1002/ecm.1275 hal-01515413 https://hal.science/hal-01515413 doi:10.1002/ecm.1275 PUBMEDCENTRAL: PMC6084314 ISSN: 0012-9615 Ecological monographs https://hal.science/hal-01515413 Ecological monographs, 2018, 88 (1), pp.60-73. ⟨10.1002/ecm.1275⟩ individual quality Diomedea exulans finite mixture model capture–mark–recapture Wandering Albatross delayed density effect population dynamics [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2018 ftunivrochelle https://doi.org/10.1002/ecm.1275 2024-01-23T23:35:33Z International audience Although population studies have long assumed that all individuals of a givensex and age are identical, ignoring among-individual differences may strongly bias our perceptionof eco-evolutionary processes. Individual heterogeneity, often referred to as individualquality, has received increasing research attention in the last decades. However, there are stillsubstantial gaps in our current knowledge. For example, there is little information on how individualheterogeneity influences various life-history traits simultaneously, and studies describingindividual heterogeneity in wild populations are generally not able to jointly identify possiblesources of this variation. Here, based on a mark–recapture data set of 9,685 known-agedWandering Albatrosses (Diomedea exulans), we investigated the existence of individual qualityover the entire life cycle of this species, from early life to senescence. Using finite mixturemodels, we investigated the expression of individual heterogeneity in various demographictraits, and examined the origin of these among-individual differences by considering the natalenvironmental conditions. We found that some individuals consistently outperformed othersduring most of their life. In old age, however, the senescence rate was stronger in males thatshowed high demographic performance at younger ages. Variation in individual quality seemedstrongly affected by extrinsic factors experienced during the ontogenetic period. We found thatindividuals born in years with high population density tended to have lower performancesduring their lifespan, suggesting delayed density dependence effects through individual quality.Our study showed that among-individual differences could be important in structuringindividual life history trajectories, with substantial consequences at higher ecological levelssuch as population dynamics. Article in Journal/Newspaper Diomedea exulans Wandering Albatross HAL - Université de La Rochelle Ecological Monographs 88 1 60 73 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
individual quality Diomedea exulans finite mixture model capture–mark–recapture Wandering Albatross delayed density effect population dynamics [SDE]Environmental Sciences |
spellingShingle |
individual quality Diomedea exulans finite mixture model capture–mark–recapture Wandering Albatross delayed density effect population dynamics [SDE]Environmental Sciences Fay, Rémi Barbraud, Christophe Delord, Karine Weimerskirch, Henri From early-life to senescence: individual heterogeneity in a long-lived seabird |
topic_facet |
individual quality Diomedea exulans finite mixture model capture–mark–recapture Wandering Albatross delayed density effect population dynamics [SDE]Environmental Sciences |
description |
International audience Although population studies have long assumed that all individuals of a givensex and age are identical, ignoring among-individual differences may strongly bias our perceptionof eco-evolutionary processes. Individual heterogeneity, often referred to as individualquality, has received increasing research attention in the last decades. However, there are stillsubstantial gaps in our current knowledge. For example, there is little information on how individualheterogeneity influences various life-history traits simultaneously, and studies describingindividual heterogeneity in wild populations are generally not able to jointly identify possiblesources of this variation. Here, based on a mark–recapture data set of 9,685 known-agedWandering Albatrosses (Diomedea exulans), we investigated the existence of individual qualityover the entire life cycle of this species, from early life to senescence. Using finite mixturemodels, we investigated the expression of individual heterogeneity in various demographictraits, and examined the origin of these among-individual differences by considering the natalenvironmental conditions. We found that some individuals consistently outperformed othersduring most of their life. In old age, however, the senescence rate was stronger in males thatshowed high demographic performance at younger ages. Variation in individual quality seemedstrongly affected by extrinsic factors experienced during the ontogenetic period. We found thatindividuals born in years with high population density tended to have lower performancesduring their lifespan, suggesting delayed density dependence effects through individual quality.Our study showed that among-individual differences could be important in structuringindividual life history trajectories, with substantial consequences at higher ecological levelssuch as population dynamics. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Fay, Rémi Barbraud, Christophe Delord, Karine Weimerskirch, Henri |
author_facet |
Fay, Rémi Barbraud, Christophe Delord, Karine Weimerskirch, Henri |
author_sort |
Fay, Rémi |
title |
From early-life to senescence: individual heterogeneity in a long-lived seabird |
title_short |
From early-life to senescence: individual heterogeneity in a long-lived seabird |
title_full |
From early-life to senescence: individual heterogeneity in a long-lived seabird |
title_fullStr |
From early-life to senescence: individual heterogeneity in a long-lived seabird |
title_full_unstemmed |
From early-life to senescence: individual heterogeneity in a long-lived seabird |
title_sort |
from early-life to senescence: individual heterogeneity in a long-lived seabird |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01515413 https://doi.org/10.1002/ecm.1275 |
genre |
Diomedea exulans Wandering Albatross |
genre_facet |
Diomedea exulans Wandering Albatross |
op_source |
ISSN: 0012-9615 Ecological monographs https://hal.science/hal-01515413 Ecological monographs, 2018, 88 (1), pp.60-73. ⟨10.1002/ecm.1275⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ecm.1275 hal-01515413 https://hal.science/hal-01515413 doi:10.1002/ecm.1275 PUBMEDCENTRAL: PMC6084314 |
op_doi |
https://doi.org/10.1002/ecm.1275 |
container_title |
Ecological Monographs |
container_volume |
88 |
container_issue |
1 |
container_start_page |
60 |
op_container_end_page |
73 |
_version_ |
1790599553130430464 |