Update of the population size and breeding performance of gentoo penguins ( Pygoscelis papua ) at Stranger Point/Cabo Funes, South Shetland Islands
The plasticity in the trophic ecology, the breeding phenology, and the low nesting site fidelity would be the reasons why most of the gentoo penguin ( Pygoscelis papua ) populations breeding in the western Antarctic Peninsula and islands of Scotia Arc remained stable or increasing, despite the chang...
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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/145052 2023-05-15T13:47:14+02:00 Update of the population size and breeding performance of gentoo penguins ( Pygoscelis papua ) at Stranger Point/Cabo Funes, South Shetland Islands Juáres, Mariana Alejandra Casaux, Ricardo Jorge Negrete, Javier Rios, Ayelen Castillo, Martín Coria, Néstor Rubén Santos, María Mercedes 2020-02 application/pdf 123-129 http://sedici.unlp.edu.ar/handle/10915/145052 en eng http://sedici.unlp.edu.ar/handle/10915/145052 issn:0722-4060 issn:1432-2056 http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) CC-BY Ciencias Naturales Pygoscelis papua Breeding pairs Chicks crèched Long-term trends Antarctica Articulo 2020 ftunivlaplata 2022-11-06T01:07:42Z The plasticity in the trophic ecology, the breeding phenology, and the low nesting site fidelity would be the reasons why most of the gentoo penguin ( Pygoscelis papua ) populations breeding in the western Antarctic Peninsula and islands of Scotia Arc remained stable or increasing, despite the changing environmental conditions. Regardless of the overall trend, recent studies revealed a decline in the abundance of some gentoo penguin populations at those regions. Therefore, it is highly valuable to update the population size of each colony in order to confirm the current trends of individual colonies and generate a comprehensive overview of the population status. We report the abundance and breeding performance of gentoo penguins at the Stranger Point/Cabo Funes colony from 2000/2001 to 2018/2019. During the last season, 5383 breeding pairs and 5545 chicks in creche were counted. Despite there were considerable inter-annual fluctuations over the study period, the total number of gentoo penguin breeding pairs increased by 74.6% (+ 3.1% per annum), while the number of chicks creched increased by 60.0% (+ 2.6% per annum). However, the index of breeding success remained relatively constant over time, varying between 0.74 and 1.23 chicks in creche/breeding pairs. Gentoo penguins have life-history strategies that are advantageous to face the environmental variability, allowing the species to maintain their breeding performance stable over time and enhance their resilience, which can favour the population growth at Stranger Point. Facultad de Ciencias Naturales y Museo Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Gentoo penguin Pygoscelis papua South Shetland Islands Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Antarctic Antarctic Peninsula cabo Funes ENVELOPE(-58.617,-58.617,-62.250,-62.250) Funes ENVELOPE(-58.617,-58.617,-62.250,-62.250) South Shetland Islands Stranger Point ENVELOPE(-58.618,-58.618,-62.262,-62.262) |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
topic |
Ciencias Naturales Pygoscelis papua Breeding pairs Chicks crèched Long-term trends Antarctica |
spellingShingle |
Ciencias Naturales Pygoscelis papua Breeding pairs Chicks crèched Long-term trends Antarctica Juáres, Mariana Alejandra Casaux, Ricardo Jorge Negrete, Javier Rios, Ayelen Castillo, Martín Coria, Néstor Rubén Santos, María Mercedes Update of the population size and breeding performance of gentoo penguins ( Pygoscelis papua ) at Stranger Point/Cabo Funes, South Shetland Islands |
topic_facet |
Ciencias Naturales Pygoscelis papua Breeding pairs Chicks crèched Long-term trends Antarctica |
description |
The plasticity in the trophic ecology, the breeding phenology, and the low nesting site fidelity would be the reasons why most of the gentoo penguin ( Pygoscelis papua ) populations breeding in the western Antarctic Peninsula and islands of Scotia Arc remained stable or increasing, despite the changing environmental conditions. Regardless of the overall trend, recent studies revealed a decline in the abundance of some gentoo penguin populations at those regions. Therefore, it is highly valuable to update the population size of each colony in order to confirm the current trends of individual colonies and generate a comprehensive overview of the population status. We report the abundance and breeding performance of gentoo penguins at the Stranger Point/Cabo Funes colony from 2000/2001 to 2018/2019. During the last season, 5383 breeding pairs and 5545 chicks in creche were counted. Despite there were considerable inter-annual fluctuations over the study period, the total number of gentoo penguin breeding pairs increased by 74.6% (+ 3.1% per annum), while the number of chicks creched increased by 60.0% (+ 2.6% per annum). However, the index of breeding success remained relatively constant over time, varying between 0.74 and 1.23 chicks in creche/breeding pairs. Gentoo penguins have life-history strategies that are advantageous to face the environmental variability, allowing the species to maintain their breeding performance stable over time and enhance their resilience, which can favour the population growth at Stranger Point. Facultad de Ciencias Naturales y Museo |
format |
Article in Journal/Newspaper |
author |
Juáres, Mariana Alejandra Casaux, Ricardo Jorge Negrete, Javier Rios, Ayelen Castillo, Martín Coria, Néstor Rubén Santos, María Mercedes |
author_facet |
Juáres, Mariana Alejandra Casaux, Ricardo Jorge Negrete, Javier Rios, Ayelen Castillo, Martín Coria, Néstor Rubén Santos, María Mercedes |
author_sort |
Juáres, Mariana Alejandra |
title |
Update of the population size and breeding performance of gentoo penguins ( Pygoscelis papua ) at Stranger Point/Cabo Funes, South Shetland Islands |
title_short |
Update of the population size and breeding performance of gentoo penguins ( Pygoscelis papua ) at Stranger Point/Cabo Funes, South Shetland Islands |
title_full |
Update of the population size and breeding performance of gentoo penguins ( Pygoscelis papua ) at Stranger Point/Cabo Funes, South Shetland Islands |
title_fullStr |
Update of the population size and breeding performance of gentoo penguins ( Pygoscelis papua ) at Stranger Point/Cabo Funes, South Shetland Islands |
title_full_unstemmed |
Update of the population size and breeding performance of gentoo penguins ( Pygoscelis papua ) at Stranger Point/Cabo Funes, South Shetland Islands |
title_sort |
update of the population size and breeding performance of gentoo penguins ( pygoscelis papua ) at stranger point/cabo funes, south shetland islands |
publishDate |
2020 |
url |
http://sedici.unlp.edu.ar/handle/10915/145052 |
long_lat |
ENVELOPE(-58.617,-58.617,-62.250,-62.250) ENVELOPE(-58.617,-58.617,-62.250,-62.250) ENVELOPE(-58.618,-58.618,-62.262,-62.262) |
geographic |
Antarctic Antarctic Peninsula cabo Funes Funes South Shetland Islands Stranger Point |
geographic_facet |
Antarctic Antarctic Peninsula cabo Funes Funes South Shetland Islands Stranger Point |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Gentoo penguin Pygoscelis papua South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Gentoo penguin Pygoscelis papua South Shetland Islands |
op_relation |
http://sedici.unlp.edu.ar/handle/10915/145052 issn:0722-4060 issn:1432-2056 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
op_rightsnorm |
CC-BY |
_version_ |
1766246791408254976 |