Pelecipod populations in thc Ayuí Grande Stream (Entre Ríos Prov.) and regulating factors of its distribution and structurc

The present paper deais with studies on populations of all the species of Pelecypoda belonging to the superfamilies Unionacea, Mutelacea and Sphaeriacea, in the Ayuí Grande stream, a small tributary of the Uruguay River in the Entre Ríos Province (Argentina). There have been specially considcrcd thc...

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Autores principales: Bonetto, Argentino A., Di Persia, Danilo H.
Formato: Artículo revista
Lenguaje:Español
Publicado: Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025
Acceso en línea:https://revistas.unne.edu.ar/index.php/eco/article/view/8242
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Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-8242
record_format ojs
spelling I48-R154-article-82422025-07-04T13:49:11Z Pelecipod populations in thc Ayuí Grande Stream (Entre Ríos Prov.) and regulating factors of its distribution and structurc Las poblaciones de Pelecípodos del Arroyo Ayuí Grande (Prov. Entre Ríos) y los factores que regulan su distribución y estructura Bonetto, Argentino A. Di Persia, Danilo H. The present paper deais with studies on populations of all the species of Pelecypoda belonging to the superfamilies Unionacea, Mutelacea and Sphaeriacea, in the Ayuí Grande stream, a small tributary of the Uruguay River in the Entre Ríos Province (Argentina). There have been specially considcrcd thc population’s structurc and distribution, its relative density, and the changes happened localy through twenty four sampling places along the whole stream and its main tributary, the Loma Negra Stream, whieh made possible to appreciate the main variations recorded throughout the course. The most important factors that determine and regúlate the structurai composition of the populations and their spacial distribution, are also analized. According to the obtained results, the studied Pelecypoda constitute relatively unstablc populations, basically resulting from the matched play of the dispersión of its parasitic larvae (glochidium and lasidium) by means of the host fishes, with the dragging exerted by the water during the floods. In consequencc, very variable concentrations appear at points that are more favourablc to thc stability of each different species. Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025-05-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://revistas.unne.edu.ar/index.php/eco/article/view/8242 Ecosur; 1975: vol. 2, no. 3; 123-151 0325-108X spa https://revistas.unne.edu.ar/index.php/eco/article/view/8242/7827 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
author Bonetto, Argentino A.
Di Persia, Danilo H.
spellingShingle Bonetto, Argentino A.
Di Persia, Danilo H.
Pelecipod populations in thc Ayuí Grande Stream (Entre Ríos Prov.) and regulating factors of its distribution and structurc
author_facet Bonetto, Argentino A.
Di Persia, Danilo H.
author_sort Bonetto, Argentino A.
title Pelecipod populations in thc Ayuí Grande Stream (Entre Ríos Prov.) and regulating factors of its distribution and structurc
title_short Pelecipod populations in thc Ayuí Grande Stream (Entre Ríos Prov.) and regulating factors of its distribution and structurc
title_full Pelecipod populations in thc Ayuí Grande Stream (Entre Ríos Prov.) and regulating factors of its distribution and structurc
title_fullStr Pelecipod populations in thc Ayuí Grande Stream (Entre Ríos Prov.) and regulating factors of its distribution and structurc
title_full_unstemmed Pelecipod populations in thc Ayuí Grande Stream (Entre Ríos Prov.) and regulating factors of its distribution and structurc
title_sort pelecipod populations in thc ayuí grande stream (entre ríos prov.) and regulating factors of its distribution and structurc
description The present paper deais with studies on populations of all the species of Pelecypoda belonging to the superfamilies Unionacea, Mutelacea and Sphaeriacea, in the Ayuí Grande stream, a small tributary of the Uruguay River in the Entre Ríos Province (Argentina). There have been specially considcrcd thc population’s structurc and distribution, its relative density, and the changes happened localy through twenty four sampling places along the whole stream and its main tributary, the Loma Negra Stream, whieh made possible to appreciate the main variations recorded throughout the course. The most important factors that determine and regúlate the structurai composition of the populations and their spacial distribution, are also analized. According to the obtained results, the studied Pelecypoda constitute relatively unstablc populations, basically resulting from the matched play of the dispersión of its parasitic larvae (glochidium and lasidium) by means of the host fishes, with the dragging exerted by the water during the floods. In consequencc, very variable concentrations appear at points that are more favourablc to thc stability of each different species.
publisher Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
publishDate 2025
url https://revistas.unne.edu.ar/index.php/eco/article/view/8242
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first_indexed 2025-06-17T05:00:35Z
last_indexed 2025-08-17T05:02:18Z
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