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Incio > Produo Cientfica do Nuplia/PEA > Evento

Ttulo: Effet des macrophytes aquatiques sur la structure des assemblages de poissons dans la plaine inonde du Haut Paran (Brsil)
Ttulo: Influence of aquatic macrophytes on fish assemblages structure of the Upper Paran River floodplain (Brazil)
Autor(es): AGOSTINHO, A.A.; THOMAZ, S.M.; BALTAR, Solma L.S.M.A.; GOMES, L.C.
Palavras-chave [PT]:

Macrfitas aquticas. Assemblia de peixes. Peixes neotropicais. Plancie de inundao. Alto rio Paran. Brasil.
Palavras-chave [EN]:
Mots-cl: Relation poisson-macrophytes. Fleuve Paran. Structure des assemblages de poissons. Poissons notropicaux. Fish-macrophytes relationship. Paran River. Brazil. Eichhornia azurea. Fish assemblage structure. Neotropical fishes.
Resumo:
Rsum: La richesse spcifique, labondance et la composition spcifique des poissons ont t observes lintrieur et lextrieur de bancs de macrophytes domins par Eichhornia azurea dans 4 habitats semi-lentique de la plaine inonde du Haut Paran (Brsil), et diffrentes priodes du jour. La richesse spcifique et labondance taient toujours plus leves sur le bord des bancs de macophytes qu lexterieur. Les longueurs moyennes taient significativement plus leves dans la zone ouverte. La structure de lassemblage de poissons et ses variations au cours de la journe peuvent tre expliques par la disponibilit des ressources alimentaires, la pression de prdation et les restrictions en oxygne.

Abstract: The species richness, abundance and length composition of fishes were assessed inside and outside stands of macrophytes dominated by Eichhornia azurea in four semi-lentic habitats of the Upper Paran River floodplain (Brazil), in different periods of the day. Species richness and abundance were consistently higher in the stand borders and lower outside. Mean length values were significantly higher in the open area. The structure pattern of the fish assemblage and its variation during a day can be explained by food resource availability, predation pressure and oxygen restrictions.
Descrio:
AGOSTINHO, Angelo Antonio; THOMAZ, Sidinei Magela; BALTAR, Solma L.S.M.A.; GOMES, Luiz Carlos. Influence of aquatic macrophytes on fish assemblages structure of the Upper Paran. In: EWRS INTERNATIONAL SYMPOSIUM ON AQUATIC WEEDS, 11., 2002. Proceedings... Ma, France, 2002. p.69-72.
Cdigo: 292

Responsavel: salete
Categoria: Aplicao
Formato: Documento PDF
Arquivo: 117-EWRS-Agostinho-etal.pdf
Tamanho: 1637 Kb (1675782 bytes)
Criado: 06-05-2008 15:09
Atualizado: 04-07-2008 15:38
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