Relative abundance and autecology of three piscivorous fishes in lakes of the upper basin of Salado River (Buenos Aires Province, Argentina)

Mostrar todas las versiones(4)

The Salado River is an important watercourse in northern Pampean region of Argentina which includes several lakes in the upper part of its basin. This upper part shows lesser fish species richness than the lower section of the river. In this paper, an analysis of community structure of secondary and...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Barla, María Julia, Vera, María S., O'Brien, Emma
Formato: Articulo
Lenguaje:Inglés
Publicado: 2003
Materias:
Zoología
Biología
Characiformes
Siluriformes
Predation
Biocenology
Lentic environments
Pampean lakes
Trophic levels
Depredación
Biocenología
Ambientes lénticos
Lagunas pampásicas
Niveles Tróficos
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/107985
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-107985
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Biología
Characiformes
Siluriformes
Predation
Biocenology
Lentic environments
Pampean lakes
Trophic levels
Depredación
Biocenología
Ambientes lénticos
Lagunas pampásicas
Niveles Tróficos
spellingShingle Zoología
Biología
Characiformes
Siluriformes
Predation
Biocenology
Lentic environments
Pampean lakes
Trophic levels
Depredación
Biocenología
Ambientes lénticos
Lagunas pampásicas
Niveles Tróficos
Barla, María Julia
Vera, María S.
O'Brien, Emma
Relative abundance and autecology of three piscivorous fishes in lakes of the upper basin of Salado River (Buenos Aires Province, Argentina)
topic_facet Zoología
Biología
Characiformes
Siluriformes
Predation
Biocenology
Lentic environments
Pampean lakes
Trophic levels
Depredación
Biocenología
Ambientes lénticos
Lagunas pampásicas
Niveles Tróficos
description The Salado River is an important watercourse in northern Pampean region of Argentina which includes several lakes in the upper part of its basin. This upper part shows lesser fish species richness than the lower section of the river. In this paper, an analysis of community structure of secondary and tertiary consumers and its autecology are presented. Among the 14 fish species recorded, 3 were mainly or totally piscivorous as adults. They constituted 11.4% of the numeric abundance and 10.8% of the biomass. Their numeric abundance was 89% (Oligosarcus jenynsii), 11% (Rhamdia sapo), and 0.5% (Hoplias malabaricus malabaricus), and their relative biomass was 61%, 33%, and 6%, respectively. Length/weight ratio, condition factor, and cephalic index indicate that the three populations presented normal development. Stomachs were classified according to the degree of repletion. Differences in repletion were attributable to the feeding behaviour of the different species. The relative abundance differed from the one observed in other environments within the same basin. This variation could be the result of interspecific competition or of differences in resource availability.
format Articulo
Articulo
author Barla, María Julia
Vera, María S.
O'Brien, Emma
author_facet Barla, María Julia
Vera, María S.
O'Brien, Emma
author_sort Barla, María Julia
title Relative abundance and autecology of three piscivorous fishes in lakes of the upper basin of Salado River (Buenos Aires Province, Argentina)
title_short Relative abundance and autecology of three piscivorous fishes in lakes of the upper basin of Salado River (Buenos Aires Province, Argentina)
title_full Relative abundance and autecology of three piscivorous fishes in lakes of the upper basin of Salado River (Buenos Aires Province, Argentina)
title_fullStr Relative abundance and autecology of three piscivorous fishes in lakes of the upper basin of Salado River (Buenos Aires Province, Argentina)
title_full_unstemmed Relative abundance and autecology of three piscivorous fishes in lakes of the upper basin of Salado River (Buenos Aires Province, Argentina)
title_sort relative abundance and autecology of three piscivorous fishes in lakes of the upper basin of salado river (buenos aires province, argentina)
publishDate 2003
url http://sedici.unlp.edu.ar/handle/10915/107985
work_keys_str_mv AT barlamariajulia relativeabundanceandautecologyofthreepiscivorousfishesinlakesoftheupperbasinofsaladoriverbuenosairesprovinceargentina
AT veramarias relativeabundanceandautecologyofthreepiscivorousfishesinlakesoftheupperbasinofsaladoriverbuenosairesprovinceargentina
AT obrienemma relativeabundanceandautecologyofthreepiscivorousfishesinlakesoftheupperbasinofsaladoriverbuenosairesprovinceargentina
AT barlamariajulia pecespiscivorosenlagunasdelacuencasuperiordelriosaladobuenosairesargentinaabundanciarelativayautoecologia
AT veramarias pecespiscivorosenlagunasdelacuencasuperiordelriosaladobuenosairesargentinaabundanciarelativayautoecologia
AT obrienemma pecespiscivorosenlagunasdelacuencasuperiordelriosaladobuenosairesargentinaabundanciarelativayautoecologia
bdutipo_str Repositorios
_version_ 1764820443851653123

Ejemplares similares