Summer feeding ecology of great pampa-finches, <i>Embernagra platensis</i> at Laguna de Guaminí, Buenos Aires, Argentina

The aim of this study was to assemble data on the summer feeding ecology of the Great Pampa-finch, Embernagra platensis at the Laguna de Guaminí, Buenos Aires, Argentina, and to explore the differences related to the dietary patterns for each sex between winter and summer when possible. The stomach...

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Autores principales: Ferman, Laura M., Montalti, Diego
Formato: Articulo
Lenguaje:Español
Publicado: 2010
Materias:
Ciencias Naturales
Biología
feeding behavior
Embernagra platensis
finch
geeding ecology
great pampa-finch
gastrointestinal contents
araneae
coleoptera
Hymenoptera
Lepidoptera
Orthoptera
Poaceae
Scirpus
Argentina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/34726
http://www.scielo.br/pdf/aabc/v82n3/14.pdf
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-34726
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Naturales
Biología
feeding behavior
Embernagra platensis
finch
geeding ecology
great pampa-finch
gastrointestinal contents
araneae
coleoptera
Hymenoptera
Lepidoptera
Orthoptera
Poaceae
Scirpus
Argentina
spellingShingle Ciencias Naturales
Biología
feeding behavior
Embernagra platensis
finch
geeding ecology
great pampa-finch
gastrointestinal contents
araneae
coleoptera
Hymenoptera
Lepidoptera
Orthoptera
Poaceae
Scirpus
Argentina
Ferman, Laura M.
Montalti, Diego
Summer feeding ecology of great pampa-finches, <i>Embernagra platensis</i> at Laguna de Guaminí, Buenos Aires, Argentina
topic_facet Ciencias Naturales
Biología
feeding behavior
Embernagra platensis
finch
geeding ecology
great pampa-finch
gastrointestinal contents
araneae
coleoptera
Hymenoptera
Lepidoptera
Orthoptera
Poaceae
Scirpus
Argentina
description The aim of this study was to assemble data on the summer feeding ecology of the Great Pampa-finch, Embernagra platensis at the Laguna de Guaminí, Buenos Aires, Argentina, and to explore the differences related to the dietary patterns for each sex between winter and summer when possible. The stomach contents of 43 birds were analyzed. The animal fraction was composed of Hymenoptera (45.1%), Coleoptera (32.4%), Lepidoptera (6.0%), Araneae (5%) and Orthoptera (3.2%). The application of the index of relative importance (IRI) resulted in 1490.4 for Coleoptera, 428.5 for Hymenoptera and 162.5 for Lepidoptera caterpillars. The vegetal fraction consisted of Triticum aestivum (26.9%), Cyperaceous (25%), Poaceae (Gramineae) (19.3%) and Panicum sp. (11.2%). The IRI values were 893.8 for Triticum aestivum, 174.5 for Gramineae, 126.5 for Panicum sp. and 112.8 for Scirpus sp. The food niche width was 0.33 for both sexes; the diversity index resulted in 1.06 for females and 1.33 for males and specific diversity ranged from 1.87 to 2.84. A canonical component analysis (CCA) was performed on environmental and morphometric variables, and a Monte Carlo test confirmed the canonical correlations. A t-test showed that some birds harmonized with a logarithmic model and some with a geometric curve. During the summer, Embernagra platensis ingests Hymenoptera and Coleoptera more often than seeds, suggesting that two biological mechanisms could be taking place in this bird.
format Articulo
Articulo
author Ferman, Laura M.
Montalti, Diego
author_facet Ferman, Laura M.
Montalti, Diego
author_sort Ferman, Laura M.
title Summer feeding ecology of great pampa-finches, <i>Embernagra platensis</i> at Laguna de Guaminí, Buenos Aires, Argentina
title_short Summer feeding ecology of great pampa-finches, <i>Embernagra platensis</i> at Laguna de Guaminí, Buenos Aires, Argentina
title_full Summer feeding ecology of great pampa-finches, <i>Embernagra platensis</i> at Laguna de Guaminí, Buenos Aires, Argentina
title_fullStr Summer feeding ecology of great pampa-finches, <i>Embernagra platensis</i> at Laguna de Guaminí, Buenos Aires, Argentina
title_full_unstemmed Summer feeding ecology of great pampa-finches, <i>Embernagra platensis</i> at Laguna de Guaminí, Buenos Aires, Argentina
title_sort summer feeding ecology of great pampa-finches, <i>embernagra platensis</i> at laguna de guaminí, buenos aires, argentina
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/34726
http://www.scielo.br/pdf/aabc/v82n3/14.pdf
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AT montaltidiego summerfeedingecologyofgreatpampafinchesiembernagraplatensisiatlagunadeguaminibuenosairesargentina
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