Update of the population size and breeding performance of gentoo penguins (<i>Pygoscelis papua</i>) 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 (<i>Pygoscelis papua</i>) populations breeding in the western Antarctic Peninsula and islands of Scotia Arc remained stable or increasing,...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Juáres, Mariana Alejandra, Casaux, Ricardo Jorge, Negrete, Javier, Rios, Ayelen, Castillo, Martín, Coria, Néstor Rubén, Santos, María Mercedes
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Naturales
Pygoscelis papua
Breeding pairs
Chicks crèched
Long-term trends
Antarctica
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/145052
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-145052
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
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 (<i>Pygoscelis papua</i>) 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 (<i>Pygoscelis papua</i>) 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.
format Articulo
Articulo
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 (<i>Pygoscelis papua</i>) at Stranger Point/Cabo Funes, South Shetland Islands
title_short Update of the population size and breeding performance of gentoo penguins (<i>Pygoscelis papua</i>) at Stranger Point/Cabo Funes, South Shetland Islands
title_full Update of the population size and breeding performance of gentoo penguins (<i>Pygoscelis papua</i>) at Stranger Point/Cabo Funes, South Shetland Islands
title_fullStr Update of the population size and breeding performance of gentoo penguins (<i>Pygoscelis papua</i>) at Stranger Point/Cabo Funes, South Shetland Islands
title_full_unstemmed Update of the population size and breeding performance of gentoo penguins (<i>Pygoscelis papua</i>) at Stranger Point/Cabo Funes, South Shetland Islands
title_sort update of the population size and breeding performance of gentoo penguins (<i>pygoscelis papua</i>) at stranger point/cabo funes, south shetland islands
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/145052
work_keys_str_mv AT juaresmarianaalejandra updateofthepopulationsizeandbreedingperformanceofgentoopenguinsipygoscelispapuaiatstrangerpointcabofunessouthshetlandislands
AT casauxricardojorge updateofthepopulationsizeandbreedingperformanceofgentoopenguinsipygoscelispapuaiatstrangerpointcabofunessouthshetlandislands
AT negretejavier updateofthepopulationsizeandbreedingperformanceofgentoopenguinsipygoscelispapuaiatstrangerpointcabofunessouthshetlandislands
AT riosayelen updateofthepopulationsizeandbreedingperformanceofgentoopenguinsipygoscelispapuaiatstrangerpointcabofunessouthshetlandislands
AT castillomartin updateofthepopulationsizeandbreedingperformanceofgentoopenguinsipygoscelispapuaiatstrangerpointcabofunessouthshetlandislands
AT corianestorruben updateofthepopulationsizeandbreedingperformanceofgentoopenguinsipygoscelispapuaiatstrangerpointcabofunessouthshetlandislands
AT santosmariamercedes updateofthepopulationsizeandbreedingperformanceofgentoopenguinsipygoscelispapuaiatstrangerpointcabofunessouthshetlandislands
bdutipo_str Repositorios
_version_ 1764820460112969728

Ejemplares similares