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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/56932
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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:UNLP2025-09-03T10:38:51Zoai: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:13292025-09-03 10:38:51.558SEDICI (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 |
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