From fresh water to the slope: Fish community ecology in the Río de la Plata and the sea beyond

The spatial pattern of fish assemblages and its relationship with factors along an environment gradient, from fresh to marine water environment along the Río de la Plata estuary (36°S, 56°W) the shelf and part of the slope, was examined using data from 22 sampling stations. Fish were sampled from al...

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Detalles Bibliográficos
Autores principales:	García, Mirta Lidia, Jaureguizar, Andrés J., Protogino, Lucila Cristina
Formato:	Articulo
Lenguaje:	Español
Publicado:	2010
Materias:	Zoología Argentine Environmental variables Estuary Fish assemblages Río de la Plata Riverine-marine gradient
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/82470
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

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record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Español
topic	Zoología Argentine Environmental variables Estuary Fish assemblages Río de la Plata Riverine-marine gradient
spellingShingle	Zoología Argentine Environmental variables Estuary Fish assemblages Río de la Plata Riverine-marine gradient García, Mirta Lidia Jaureguizar, Andrés J. Protogino, Lucila Cristina From fresh water to the slope: Fish community ecology in the Río de la Plata and the sea beyond
topic_facet	Zoología Argentine Environmental variables Estuary Fish assemblages Río de la Plata Riverine-marine gradient
description	The spatial pattern of fish assemblages and its relationship with factors along an environment gradient, from fresh to marine water environment along the Río de la Plata estuary (36°S, 56°W) the shelf and part of the slope, was examined using data from 22 sampling stations. Fish were sampled from all station with an Engel type trawl (200 mm stretched mesh in the wings, 120 mm stretched mesh in the cod ends, 4 m vertical opening and 15 m horizontal aperture) towed at 4 knots for 20 to 30 min per set. Cluster analysis and ordination analysis MDS were used to define spatial distribution of fish assemblages based on fish composition (abundance and biomass). BIO-ENV process was used to estimate assemblage association with depth, temperature and salinity of surface and bottom waters. The results of these analyses showed that the fish community along the riverine-marine gradient was structured in four assemblages: riverine, estuarine, shelf and slope. These assemblages were found to differ significantly in their species composition. Each assemblage was characterized by several common and discriminator species and characterized by differing environmental conditions. Bottom salinity and bottom temperature were the environmental variables most strongly associated with differences in assemblage structure across the various areas. The changes in assemblage structure between areas were gradual, with no sharp boundaries.
format	Articulo Articulo
author	García, Mirta Lidia Jaureguizar, Andrés J. Protogino, Lucila Cristina
author_facet	García, Mirta Lidia Jaureguizar, Andrés J. Protogino, Lucila Cristina
author_sort	García, Mirta Lidia
title	From fresh water to the slope: Fish community ecology in the Río de la Plata and the sea beyond
title_short	From fresh water to the slope: Fish community ecology in the Río de la Plata and the sea beyond
title_full	From fresh water to the slope: Fish community ecology in the Río de la Plata and the sea beyond
title_fullStr	From fresh water to the slope: Fish community ecology in the Río de la Plata and the sea beyond
title_full_unstemmed	From fresh water to the slope: Fish community ecology in the Río de la Plata and the sea beyond
title_sort	from fresh water to the slope: fish community ecology in the río de la plata and the sea beyond
publishDate	2010
url	http://sedici.unlp.edu.ar/handle/10915/82470
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From fresh water to the slope: Fish community ecology in the Río de la Plata and the sea beyond

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