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 (36ºS, 56ºW) the shelf and part of the slope, was examined using data from 22 sampling stations. Fish were sampled from al...

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Autores principales:	García,Mirta L, Jaureguizar,Andrés J, Protogino,Lucila C
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2010
Materias:	fish assemblages riverine-marine gradient environmental variables estuary Río de la Plata Argentine
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2010000100008
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spelling	oai:scielo:S0718-560X20100001000082010-04-20From fresh water to the slope: fish community ecology in the Río de la Plata and the sea beyondGarcía,Mirta LJaureguizar,Andrés JProtogino,Lucila C fish assemblages riverine-marine gradient environmental variables estuary Río de la Plata Argentine 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 (36ºS, 56ºW) 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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.38 n.1 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2010000100008en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	fish assemblages riverine-marine gradient environmental variables estuary Río de la Plata Argentine
spellingShingle	fish assemblages riverine-marine gradient environmental variables estuary Río de la Plata Argentine García,Mirta L Jaureguizar,Andrés J Protogino,Lucila C From fresh water to the slope: fish community ecology in the Río de la Plata and the sea beyond
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 (36ºS, 56ºW) 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.
author	García,Mirta L Jaureguizar,Andrés J Protogino,Lucila C
author_facet	García,Mirta L Jaureguizar,Andrés J Protogino,Lucila C
author_sort	García,Mirta L
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
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2010000100008
work_keys_str_mv	AT garciamirtal fromfreshwatertotheslopefishcommunityecologyintheriodelaplataandtheseabeyond AT jaureguizarandresj fromfreshwatertotheslopefishcommunityecologyintheriodelaplataandtheseabeyond AT protoginolucilac fromfreshwatertotheslopefishcommunityecologyintheriodelaplataandtheseabeyond
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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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