Diet of Adélie penguins (<i>Pygoscelis adeliae</i>) at Stranger Point (25 de Mayo/King George Island, Antarctica) over a 13-year period (2003–2015)

Knowledge of the feeding ecology of a species at local level is fundamental to determine the relationship between the fluctuations in local marine resources and population dynamics of predators. In this study, we examined the diet of Adélie penguins (<i>Pygoscelis adeliae</i>) during the...

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Autores principales: Juáres, Mariana Alejandra, Casaux, Ricardo Jorge, Corbalán, Aldo, Blanco, Gabriel, Pereira, G. Ariel, Perchivale, Pablo José, Coria, Néstor Rubén, Santos, María Mercedes
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Naturales
Pygoscelis adeliae
Krill-dependent species
Prey availability
South Shetland Islands
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/133294
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-133294
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 adeliae
Krill-dependent species
Prey availability
South Shetland Islands
spellingShingle Ciencias Naturales
Pygoscelis adeliae
Krill-dependent species
Prey availability
South Shetland Islands
Juáres, Mariana Alejandra
Casaux, Ricardo Jorge
Corbalán, Aldo
Blanco, Gabriel
Pereira, G. Ariel
Perchivale, Pablo José
Coria, Néstor Rubén
Santos, María Mercedes
Diet of Adélie penguins (<i>Pygoscelis adeliae</i>) at Stranger Point (25 de Mayo/King George Island, Antarctica) over a 13-year period (2003–2015)
topic_facet Ciencias Naturales
Pygoscelis adeliae
Krill-dependent species
Prey availability
South Shetland Islands
description Knowledge of the feeding ecology of a species at local level is fundamental to determine the relationship between the fluctuations in local marine resources and population dynamics of predators. In this study, we examined the diet of Adélie penguins (<i>Pygoscelis adeliae</i>) during the crèche stage at the Stranger Point colony, South Shetland Islands, Antarctica, over a 13-year period (2002/2003–2014/2015). Antarctic krill (<i>Euphausia superba</i>) was the dominant prey for Adélie penguins during the crèche period (contribution: 100% of occurrence and >99.7% by mass). The fish component in the diet represented a small proportion of the total prey (contribution: from 4 to 24% of occurrence but <0.15% by mass). A marked inter-annual variability in the mass of stomach contents, the krill size consumed and the proportion of juvenile krill was observed. Moreover, a possible recruitment event of krill was recorded. A negative relationship between the size of krill in the diet and breeding success was found, suggesting that population dynamics of krill also reflected changes in the local availability of this crustacean. This work is the first long-term study of dietary parameters of Adélie penguins for the Stranger Point colony.
format Articulo
Articulo
author Juáres, Mariana Alejandra
Casaux, Ricardo Jorge
Corbalán, Aldo
Blanco, Gabriel
Pereira, G. Ariel
Perchivale, Pablo José
Coria, Néstor Rubén
Santos, María Mercedes
author_facet Juáres, Mariana Alejandra
Casaux, Ricardo Jorge
Corbalán, Aldo
Blanco, Gabriel
Pereira, G. Ariel
Perchivale, Pablo José
Coria, Néstor Rubén
Santos, María Mercedes
author_sort Juáres, Mariana Alejandra
title Diet of Adélie penguins (<i>Pygoscelis adeliae</i>) at Stranger Point (25 de Mayo/King George Island, Antarctica) over a 13-year period (2003–2015)
title_short Diet of Adélie penguins (<i>Pygoscelis adeliae</i>) at Stranger Point (25 de Mayo/King George Island, Antarctica) over a 13-year period (2003–2015)
title_full Diet of Adélie penguins (<i>Pygoscelis adeliae</i>) at Stranger Point (25 de Mayo/King George Island, Antarctica) over a 13-year period (2003–2015)
title_fullStr Diet of Adélie penguins (<i>Pygoscelis adeliae</i>) at Stranger Point (25 de Mayo/King George Island, Antarctica) over a 13-year period (2003–2015)
title_full_unstemmed Diet of Adélie penguins (<i>Pygoscelis adeliae</i>) at Stranger Point (25 de Mayo/King George Island, Antarctica) over a 13-year period (2003–2015)
title_sort diet of adélie penguins (<i>pygoscelis adeliae</i>) at stranger point (25 de mayo/king george island, antarctica) over a 13-year period (2003–2015)
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/133294
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