Trophic habits of Acestrorhynchus pantaneiro (Menezes 1992) in the alluvial valley of the Paraná River, Corrientes (Argentina)

The study of fish diets allows us to understand how they influence other organisms in the ecosystem through trophic interactions. The aim of this study was to expand our knowledge of the trophic habits of Acestrorhynchus pantaneiro in the alluvial valley of the Paraná River, Corrientes (Argentina)....

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Autores principales: Bertrán, P., Moreno, E. G., Hernández, D., González, A. O., Sánchez, S., Ruiz Díaz, F. J.
Formato: Artículo revista
Lenguaje:Español
Publicado: Universidad Nacional del Nordeste 2024
Materias:
diet
piscivore
Acestrorhynchus pantaneiro
Yacyretá
alluvial valley
dieta
piscívoro
valle aluvial
Acceso en línea:https://revistas.unne.edu.ar/index.php/vet/article/view/7482
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-7482
record_format ojs
spelling I48-R154-article-74822024-05-15T00:22:45Z Trophic habits of Acestrorhynchus pantaneiro (Menezes 1992) in the alluvial valley of the Paraná River, Corrientes (Argentina) Hábitos tróficos del dientudo Acestrorhynchus pantaneiro (Menezes 1992) en el valle aluvial del Río Paraná, Corrientes (Argentina) Bertrán, P. Moreno, E. G. Hernández, D. González, A. O. Sánchez, S. Ruiz Díaz, F. J. diet piscivore Acestrorhynchus pantaneiro Yacyretá alluvial valley dieta piscívoro Acestrorhynchus pantaneiro Yacyretá valle aluvial The study of fish diets allows us to understand how they influence other organisms in the ecosystem through trophic interactions. The aim of this study was to expand our knowledge of the trophic habits of Acestrorhynchus pantaneiro in the alluvial valley of the Paraná River, Corrientes (Argentina). This study involved the collection and evaluation of 140 individuals of A. pantaneiro between May 2016 and February 2018 in four areas of the Paraná River, downstream of the Yacyretá dam. The stomach contents were analyzed at the taxonomic level to calculate the following indicators: frequency of occurrence index, volumetric method, and dietary index. Of the 140 specimens evaluated, 58% had some type of food item in their stomach, whereas 42% were found empty. The analysis of stomach contents allowed us to differentiate several species consumed belonging to the orders Perciformes, Characiformes and Siluriformes; however, the genus Crenicichla presented the highest percentage values of the indicators. The results of this study suggest that A. pantaneiro, in addition to having piscivorous trophic habits, demonstrated preferences for consuming species of the genus Crenicichla. El estudio de la dieta de los peces permite entender cómo éstos influyen en los demás organismos del ecosistema a través de las interacciones tróficas. El objetivo del estudio fue ampliar el conocimiento que se tiene del hábito trófico de Acestrorhynchus pantaneiro en el valle aluvial del río Paraná. Se evaluaron contenidos estomacales de 140 individuos de A. pantaneiro recolectados con pesca eléctrica en cuatro zonas del río Paraná, aguas abajo de la represa de Yacyretá, entre mayo de 2016 y febrero de 2018. Se evaluó la presencia/ausencia de contenido estomacal y para cada ítem se analizó a nivel taxonómico procediendo al cálculo de los siguientes indicadores: índice de frecuencia de ocurrencia, método volumétrico e índice alimentario. El 58% de las muestras presentaron algún tipo de ítem alimentario en el contenido estomacal, mientras que el 42% se encontraron vacíos. Los ítems más frecuentes hallados en los estómagos fueron especies de los órdenes Perciformes, Characiformes y Siluriformes, estimándose los mayores valores porcentuales para el género Crenicichla. Los resultados de este estudio sugieren que A. pantaneiro, además de tener hábitos tróficos piscívoros, demostró preferencias por el consumo de especies del género Crenicichla. Universidad Nacional del Nordeste 2024-05-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/7482 10.30972/vet.3517482 Revista Veterinaria; Vol. 35 Núm. 1 (2024); 62-68 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/7482/6913 https://creativecommons.org/licenses/by-nc/4.0
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic diet
piscivore
Acestrorhynchus pantaneiro
Yacyretá
alluvial valley
dieta
piscívoro
Acestrorhynchus pantaneiro
Yacyretá
valle aluvial
spellingShingle diet
piscivore
Acestrorhynchus pantaneiro
Yacyretá
alluvial valley
dieta
piscívoro
Acestrorhynchus pantaneiro
Yacyretá
valle aluvial
Bertrán, P.
Moreno, E. G.
Hernández, D.
González, A. O.
Sánchez, S.
Ruiz Díaz, F. J.
Trophic habits of Acestrorhynchus pantaneiro (Menezes 1992) in the alluvial valley of the Paraná River, Corrientes (Argentina)
topic_facet diet
piscivore
Acestrorhynchus pantaneiro
Yacyretá
alluvial valley
dieta
piscívoro
Acestrorhynchus pantaneiro
Yacyretá
valle aluvial
author Bertrán, P.
Moreno, E. G.
Hernández, D.
González, A. O.
Sánchez, S.
Ruiz Díaz, F. J.
author_facet Bertrán, P.
Moreno, E. G.
Hernández, D.
González, A. O.
Sánchez, S.
Ruiz Díaz, F. J.
author_sort Bertrán, P.
title Trophic habits of Acestrorhynchus pantaneiro (Menezes 1992) in the alluvial valley of the Paraná River, Corrientes (Argentina)
title_short Trophic habits of Acestrorhynchus pantaneiro (Menezes 1992) in the alluvial valley of the Paraná River, Corrientes (Argentina)
title_full Trophic habits of Acestrorhynchus pantaneiro (Menezes 1992) in the alluvial valley of the Paraná River, Corrientes (Argentina)
title_fullStr Trophic habits of Acestrorhynchus pantaneiro (Menezes 1992) in the alluvial valley of the Paraná River, Corrientes (Argentina)
title_full_unstemmed Trophic habits of Acestrorhynchus pantaneiro (Menezes 1992) in the alluvial valley of the Paraná River, Corrientes (Argentina)
title_sort trophic habits of acestrorhynchus pantaneiro (menezes 1992) in the alluvial valley of the paraná river, corrientes (argentina)
description The study of fish diets allows us to understand how they influence other organisms in the ecosystem through trophic interactions. The aim of this study was to expand our knowledge of the trophic habits of Acestrorhynchus pantaneiro in the alluvial valley of the Paraná River, Corrientes (Argentina). This study involved the collection and evaluation of 140 individuals of A. pantaneiro between May 2016 and February 2018 in four areas of the Paraná River, downstream of the Yacyretá dam. The stomach contents were analyzed at the taxonomic level to calculate the following indicators: frequency of occurrence index, volumetric method, and dietary index. Of the 140 specimens evaluated, 58% had some type of food item in their stomach, whereas 42% were found empty. The analysis of stomach contents allowed us to differentiate several species consumed belonging to the orders Perciformes, Characiformes and Siluriformes; however, the genus Crenicichla presented the highest percentage values of the indicators. The results of this study suggest that A. pantaneiro, in addition to having piscivorous trophic habits, demonstrated preferences for consuming species of the genus Crenicichla.
publisher Universidad Nacional del Nordeste
publishDate 2024
url https://revistas.unne.edu.ar/index.php/vet/article/view/7482
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first_indexed 2024-08-21T22:35:57Z
last_indexed 2024-08-21T22:35:57Z
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