Fish assemblages in a small temperate estuary on the argentinian coast: spatial variation, environmental influence and relevance as nursery area

The effects of different environmental variables on the fish community structure were evaluated in a small temperate estuary. The biological and environmental data were collected bimonthly between 2007 and 2009 along the main estuarine axis. Multivariate analyses were applied (CLUSTER, SIMPER, CCA)...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Solari, Agustín, Jaureguizar, Andrés J., Milessi, Andrés C., García, Mirta Lidia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Naturales
Ajó river
Fish assemblage
Juvenile fish
Río de la Plata
Salinity gradient
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86077
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86077
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Ajó river
Fish assemblage
Juvenile fish
Río de la Plata
Salinity gradient
spellingShingle Ciencias Naturales
Ajó river
Fish assemblage
Juvenile fish
Río de la Plata
Salinity gradient
Solari, Agustín
Jaureguizar, Andrés J.
Milessi, Andrés C.
García, Mirta Lidia
Fish assemblages in a small temperate estuary on the argentinian coast: spatial variation, environmental influence and relevance as nursery area
topic_facet Ciencias Naturales
Ajó river
Fish assemblage
Juvenile fish
Río de la Plata
Salinity gradient
description The effects of different environmental variables on the fish community structure were evaluated in a small temperate estuary. The biological and environmental data were collected bimonthly between 2007 and 2009 along the main estuarine axis. Multivariate analyses were applied (CLUSTER, SIMPER, CCA) to determine the spatial structure of fish community and to estimate the environmental influence on it. A total of 48 species of “teleost” fishes were observed, with the families Characidae and Sciaenidae presenting the largest number of species, 90% of the catches being juveniles. The fish community was overwhelmingly dominated by one species (<i>Micropogonias furnieri</i>, 88.9%), and only four species contributed more than 1% of total catch (<i>Odontesthes argentinensis</i> 5.4%, <i>Brevoortia aurea</i> 1.1%, <i>Paralonchurus brasiliensis</i> 1.1%, and <i>Mugil platanus</i> 1.0%). Estuarine and freshwater stragglers dominated in number of species, followed by freshwater migrants and marine migrants. Three areas with different fish assemblages, with distinctive species and functional guilds, were defined along the main axis. The occurrence and spatial spread of these areas were linked to spatial variation in salinity, which was consistently influenced by discharge from the Río de la Plata and local precipitation. The results highlight the importance of shallow environments as nursery areas and permit emphasis on their susceptibility to environmental changes.
format Articulo
Articulo
author Solari, Agustín
Jaureguizar, Andrés J.
Milessi, Andrés C.
García, Mirta Lidia
author_facet Solari, Agustín
Jaureguizar, Andrés J.
Milessi, Andrés C.
García, Mirta Lidia
author_sort Solari, Agustín
title Fish assemblages in a small temperate estuary on the argentinian coast: spatial variation, environmental influence and relevance as nursery area
title_short Fish assemblages in a small temperate estuary on the argentinian coast: spatial variation, environmental influence and relevance as nursery area
title_full Fish assemblages in a small temperate estuary on the argentinian coast: spatial variation, environmental influence and relevance as nursery area
title_fullStr Fish assemblages in a small temperate estuary on the argentinian coast: spatial variation, environmental influence and relevance as nursery area
title_full_unstemmed Fish assemblages in a small temperate estuary on the argentinian coast: spatial variation, environmental influence and relevance as nursery area
title_sort fish assemblages in a small temperate estuary on the argentinian coast: spatial variation, environmental influence and relevance as nursery area
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86077
work_keys_str_mv AT solariagustin fishassemblagesinasmalltemperateestuaryontheargentiniancoastspatialvariationenvironmentalinfluenceandrelevanceasnurseryarea
AT jaureguizarandresj fishassemblagesinasmalltemperateestuaryontheargentiniancoastspatialvariationenvironmentalinfluenceandrelevanceasnurseryarea
AT milessiandresc fishassemblagesinasmalltemperateestuaryontheargentiniancoastspatialvariationenvironmentalinfluenceandrelevanceasnurseryarea
AT garciamirtalidia fishassemblagesinasmalltemperateestuaryontheargentiniancoastspatialvariationenvironmentalinfluenceandrelevanceasnurseryarea
bdutipo_str Repositorios
_version_ 1764820489270722560

Ejemplares similares