Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires

Autores
Schwerdt, Marcelo Gabriel; López Cazorla, Andrea Cecilia
Año de publicación
2014
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The aim of the present study was to analyze the feeding of the silverside Odontesthes bonariensis in the Venado and Alsina lake. which are part of the Encadenadas del Oeste lake system. The stomach content of 206 individuals was analyzed. Total length ranged from 93 to 585 mm. The vacuity index (VI) and repletion index (RI) were estimated by season and site. Index of Relative Importance (IRI) for each food category and the trophic level (TL) of pejerrey were calculated by site. The diet of the silverside was composed of 68 prey items, most of which were occasional preys. Copepods and cladocerans were the main prey items in the diet in both lagoons. Copepods were the most important item in Venado lagoon and cladocerans were so in Alsina lagoon. The micro crustaceans were the main prey item for both size classes, however their %IRI decreased in the larger fish (95% IRI for the 93-299 mm Tl size class and 63% IRI for the 300-585 mm Tl size class). Silverside TL estimated for each lagoon (TL= 3) characterizes it as secondary consumer.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Buenos Aires (Argentina)
Peces
ecología trófica
Lagunas
Ecosistema
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/56932
Acceder
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network_acronym_str SEDICI
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network_name_str SEDICI (UNLP)
spelling Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos AiresSchwerdt, Marcelo GabrielLópez Cazorla, Andrea CeciliaCiencias NaturalesBuenos Aires (Argentina)Pecesecología tróficaLagunasEcosistemaThe aim of the present study was to analyze the feeding of the silverside Odontesthes bonariensis in the Venado and Alsina lake. which are part of the Encadenadas del Oeste lake system. The stomach content of 206 individuals was analyzed. Total length ranged from 93 to 585 mm. The vacuity index (VI) and repletion index (RI) were estimated by season and site. Index of Relative Importance (IRI) for each food category and the trophic level (TL) of pejerrey were calculated by site. The diet of the silverside was composed of 68 prey items, most of which were occasional preys. Copepods and cladocerans were the main prey items in the diet in both lagoons. Copepods were the most important item in Venado lagoon and cladocerans were so in Alsina lagoon. The micro crustaceans were the main prey item for both size classes, however their %IRI decreased in the larger fish (95% IRI for the 93-299 mm Tl size class and 63% IRI for the 300-585 mm Tl size class). Silverside TL estimated for each lagoon (TL= 3) characterizes it as secondary consumer.Facultad de Ciencias Naturales y Museo2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf203-217http://sedici.unlp.edu.ar/handle/10915/56932spainfo:eu-repo/semantics/altIdentifier/url/http://www.bacuatica.org/index.php/bacuatica/article/view/34info:eu-repo/semantics/altIdentifier/issn/1668-4869info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:06:12Zoai:sedici.unlp.edu.ar:10915/56932Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:06:12.495SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires
title Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires
spellingShingle Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires
Schwerdt, Marcelo Gabriel
Ciencias Naturales
Buenos Aires (Argentina)
Peces
ecología trófica
Lagunas
Ecosistema
title_short Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires
title_full Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires
title_fullStr Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires
title_full_unstemmed Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires
title_sort Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires
dc.creator.none.fl_str_mv Schwerdt, Marcelo Gabriel
López Cazorla, Andrea Cecilia
author Schwerdt, Marcelo Gabriel
author_facet Schwerdt, Marcelo Gabriel
López Cazorla, Andrea Cecilia
author_role author
author2 López Cazorla, Andrea Cecilia
author2_role author
dc.subject.none.fl_str_mv Ciencias Naturales
Buenos Aires (Argentina)
Peces
ecología trófica
Lagunas
Ecosistema
topic Ciencias Naturales
Buenos Aires (Argentina)
Peces
ecología trófica
Lagunas
Ecosistema
dc.description.none.fl_txt_mv The aim of the present study was to analyze the feeding of the silverside Odontesthes bonariensis in the Venado and Alsina lake. which are part of the Encadenadas del Oeste lake system. The stomach content of 206 individuals was analyzed. Total length ranged from 93 to 585 mm. The vacuity index (VI) and repletion index (RI) were estimated by season and site. Index of Relative Importance (IRI) for each food category and the trophic level (TL) of pejerrey were calculated by site. The diet of the silverside was composed of 68 prey items, most of which were occasional preys. Copepods and cladocerans were the main prey items in the diet in both lagoons. Copepods were the most important item in Venado lagoon and cladocerans were so in Alsina lagoon. The micro crustaceans were the main prey item for both size classes, however their %IRI decreased in the larger fish (95% IRI for the 93-299 mm Tl size class and 63% IRI for the 300-585 mm Tl size class). Silverside TL estimated for each lagoon (TL= 3) characterizes it as secondary consumer.
Facultad de Ciencias Naturales y Museo
description The aim of the present study was to analyze the feeding of the silverside Odontesthes bonariensis in the Venado and Alsina lake. which are part of the Encadenadas del Oeste lake system. The stomach content of 206 individuals was analyzed. Total length ranged from 93 to 585 mm. The vacuity index (VI) and repletion index (RI) were estimated by season and site. Index of Relative Importance (IRI) for each food category and the trophic level (TL) of pejerrey were calculated by site. The diet of the silverside was composed of 68 prey items, most of which were occasional preys. Copepods and cladocerans were the main prey items in the diet in both lagoons. Copepods were the most important item in Venado lagoon and cladocerans were so in Alsina lagoon. The micro crustaceans were the main prey item for both size classes, however their %IRI decreased in the larger fish (95% IRI for the 93-299 mm Tl size class and 63% IRI for the 300-585 mm Tl size class). Silverside TL estimated for each lagoon (TL= 3) characterizes it as secondary consumer.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/56932
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dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.bacuatica.org/index.php/bacuatica/article/view/34
info:eu-repo/semantics/altIdentifier/issn/1668-4869
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.format.none.fl_str_mv application/pdf
203-217
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reponame_str SEDICI (UNLP)
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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