Artículo
Fish ecology of a seasonal lowland stream in temperate South America
Almirón, Adriana Edith; Garcia, Mirta Lidia
; Menni, Roberto Carlos
; Protogino, Lucila Cristina
; Solari, Lía Cristina
Fecha de publicación:
01/2000
Editorial:
Csiro Publishing
Revista:
Marine and Freshwater Research
ISSN:
1323-1650
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
El Pescado (literally ‘the fish’) is a lowland stream in the pampean plain, entering the Rio de La Plata at 35˚55¢S,57˚45¢W, 70 km SW of the city of Buenos Aires. The stream develops as a potamon with variable flood frequency along its 36 km length. The water is slightly soft, with relatively high conductivity and dominance of HCO–3 , Na + and Cl – ions. Three fish families, Characidae (29%), Pimelodidae (14.6%) and Loricariidae (12.8%) are most abundant among 55 species. Differences in species composition among four stations with different environmental traits were observed. Flooding slightly affected the fish fauna. In open-water and rocky-bottom stations, both species number and number of individuals were correlated with conductivity, an indication of the decrease of fish density with floods. Species richness was well over worldwide means. Diversity values, higher than in small tropical streams in Venezuela and southern Brazil, ranged from 0.32 to 2.59, being higher during autumn and spring. The stream has a high persistence, with the composition of the fish community maintained or recovering as soon as flooding ends. One Synbranchus marmoratus specimen was found among rocks, the first record of this behaviour for the species.
Palabras clave:
ICHTHYOLOGY
,
REPRODUCTIVE PERIOD
,
FLOODING
,
TEMPERATE SOUTH AMERICA
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(ILPLA)
Articulos de INST.DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Articulos de INST.DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Citación
Almirón, Adriana Edith; Garcia, Mirta Lidia; Menni, Roberto Carlos; Protogino, Lucila Cristina; Solari, Lía Cristina; Fish ecology of a seasonal lowland stream in temperate South America; Csiro Publishing; Marine and Freshwater Research; 51; 3; 1-2000; 265-274
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