Feeding ecology of the siluriform <i>Pimelodella laticeps</i> Eigenmann, 1917 in a Pampean stream from Argentina

<i>Pimelodella laticeps</i> Eigenmann, 1917 is the most abundant siluriform in the El Pescado Stream, located in the depressed region known as pampean region (Buenos Aires, Argentina). To characterize its feeding habits in this environment, we analyzed the dietary contents on seasonal sa...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: García, Mirta Lidia, Solari, Lía Cristina, García de Souza, Javier Ricardo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Naturales
Dietary plasticity
Feeding habits
Gray catfish
Neotropical-plains stream
Pampean region
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87588
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87588
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
Dietary plasticity
Feeding habits
Gray catfish
Neotropical-plains stream
Pampean region
spellingShingle Ciencias Naturales
Dietary plasticity
Feeding habits
Gray catfish
Neotropical-plains stream
Pampean region
García, Mirta Lidia
Solari, Lía Cristina
García de Souza, Javier Ricardo
Feeding ecology of the siluriform <i>Pimelodella laticeps</i> Eigenmann, 1917 in a Pampean stream from Argentina
topic_facet Ciencias Naturales
Dietary plasticity
Feeding habits
Gray catfish
Neotropical-plains stream
Pampean region
description <i>Pimelodella laticeps</i> Eigenmann, 1917 is the most abundant siluriform in the El Pescado Stream, located in the depressed region known as pampean region (Buenos Aires, Argentina). To characterize its feeding habits in this environment, we analyzed the dietary contents on seasonal samplings from May 1991 through August 1993. To evaluate the relative contribution of the different dietary components, the index of relative importance (IRI) was used. <i>Pimelodella laticeps</i> preferred sectors with aquatic macrophytes, and predated mainly on organisms from the periphytic and benthic communities. The main food was cyclopoid copepods, which taxa usually have littoral or benthic habitats, and only to a lesser extent are components of the plankton community. The planktonic organisms available in the environment were analyzed by the Olmstead-Tukey-test, which diagram indicated that the dominant items were copepods, ostracods, and chironomids. Chydorid cladocerans, harpacticoid copepods, mayfly larvae, and amphipods also became dominant but less frequently. To understand the feeding strategies of <i>P. laticeps</i>, the fish diet was compared with the available plankton as analyzed by a nonparametric multivariate analysis (permutation-based one-way ANOSIM). <i>Pimelodella laticeps</i> consumed almost no phytoplankton, while the discriminating items from the latter assemblage were identified as having high values in the environment.
format Articulo
Articulo
author García, Mirta Lidia
Solari, Lía Cristina
García de Souza, Javier Ricardo
author_facet García, Mirta Lidia
Solari, Lía Cristina
García de Souza, Javier Ricardo
author_sort García, Mirta Lidia
title Feeding ecology of the siluriform <i>Pimelodella laticeps</i> Eigenmann, 1917 in a Pampean stream from Argentina
title_short Feeding ecology of the siluriform <i>Pimelodella laticeps</i> Eigenmann, 1917 in a Pampean stream from Argentina
title_full Feeding ecology of the siluriform <i>Pimelodella laticeps</i> Eigenmann, 1917 in a Pampean stream from Argentina
title_fullStr Feeding ecology of the siluriform <i>Pimelodella laticeps</i> Eigenmann, 1917 in a Pampean stream from Argentina
title_full_unstemmed Feeding ecology of the siluriform <i>Pimelodella laticeps</i> Eigenmann, 1917 in a Pampean stream from Argentina
title_sort feeding ecology of the siluriform <i>pimelodella laticeps</i> eigenmann, 1917 in a pampean stream from argentina
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87588
work_keys_str_mv AT garciamirtalidia feedingecologyofthesiluriformipimelodellalaticepsieigenmann1917inapampeanstreamfromargentina
AT solariliacristina feedingecologyofthesiluriformipimelodellalaticepsieigenmann1917inapampeanstreamfromargentina
AT garciadesouzajavierricardo feedingecologyofthesiluriformipimelodellalaticepsieigenmann1917inapampeanstreamfromargentina
AT garciamirtalidia ecologiaalimentariadelsiluriformeipimelodellalaticepsieigenmann1917enunarroyopampeanodelaargentina
AT solariliacristina ecologiaalimentariadelsiluriformeipimelodellalaticepsieigenmann1917enunarroyopampeanodelaargentina
AT garciadesouzajavierricardo ecologiaalimentariadelsiluriformeipimelodellalaticepsieigenmann1917enunarroyopampeanodelaargentina
bdutipo_str Repositorios
_version_ 1764820489192079361

Ejemplares similares