Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence?
8 pages International audience We examined the growth rate of the breeding population of king penguins of Crozet archipelago over 41 years. Most colonies showed positive growth rates from the 1960s. However, there was evidence for a decrease in the larger colonies since the early 1990s, and for lowe...
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ftccsdartic:oai:HAL:hal-00186860v1 2024-02-27T08:42:32+00:00 Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence? Barbraud, Christophe Delord, Karine Weimerskirch, Henri Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) 2004-08 https://hal.science/hal-00186860 en eng HAL CCSD Springer Verlag hal-00186860 https://hal.science/hal-00186860 ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-00186860 Polar Biology, 2004, 27, pp.793-800 [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environment and Society [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2004 ftccsdartic 2024-01-28T03:19:15Z 8 pages International audience We examined the growth rate of the breeding population of king penguins of Crozet archipelago over 41 years. Most colonies showed positive growth rates from the 1960s. However, there was evidence for a decrease in the larger colonies since the early 1990s, and for lower growth rates in the smaller colonies during the 1990s. The overall population size was estimated using log linear models, and the average annual growth rate was +6.3% for the 41-year period. Four change points were detected in the annual growth rate: +21.1% during 1978–1985, +4.3% during 1985–1995, 19.2% during 1995–1999, and +10.9% during 1999–2003. Time-series analyses of the population-size estimates and the relationship between growth rate and population size both indicated density-dependence in population growth rate. Variations in population sizes are also discussed in relation to environmental fluctuations. Our results suggest that important changes occurred over the past 10 years. Article in Journal/Newspaper King Penguins Polar Biology Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environment and Society [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environment and Society [SDE.MCG]Environmental Sciences/Global Changes Barbraud, Christophe Delord, Karine Weimerskirch, Henri Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence? |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environment and Society [SDE.MCG]Environmental Sciences/Global Changes |
description |
8 pages International audience We examined the growth rate of the breeding population of king penguins of Crozet archipelago over 41 years. Most colonies showed positive growth rates from the 1960s. However, there was evidence for a decrease in the larger colonies since the early 1990s, and for lower growth rates in the smaller colonies during the 1990s. The overall population size was estimated using log linear models, and the average annual growth rate was +6.3% for the 41-year period. Four change points were detected in the annual growth rate: +21.1% during 1978–1985, +4.3% during 1985–1995, 19.2% during 1995–1999, and +10.9% during 1999–2003. Time-series analyses of the population-size estimates and the relationship between growth rate and population size both indicated density-dependence in population growth rate. Variations in population sizes are also discussed in relation to environmental fluctuations. Our results suggest that important changes occurred over the past 10 years. |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Barbraud, Christophe Delord, Karine Weimerskirch, Henri |
author_facet |
Barbraud, Christophe Delord, Karine Weimerskirch, Henri |
author_sort |
Barbraud, Christophe |
title |
Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence? |
title_short |
Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence? |
title_full |
Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence? |
title_fullStr |
Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence? |
title_full_unstemmed |
Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence? |
title_sort |
long-term trends in the population size of king penguins at crozet archipelago: environmental variability and density dependence? |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00186860 |
genre |
King Penguins Polar Biology |
genre_facet |
King Penguins Polar Biology |
op_source |
ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-00186860 Polar Biology, 2004, 27, pp.793-800 |
op_relation |
hal-00186860 https://hal.science/hal-00186860 |
_version_ |
1792050281419112448 |