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	Provedor de dados Biota Neotropica (1) RChHN (1) Autor ALBARIÑO,RICARDO J (1) BALSEIRO,ESTEBAN G (1) BURIA,LEONARDO M (1) Cabrera,Gabriela Cecilia (1) Echaniz,Santiago Andrés (1) MODENUTTI,BEATRIZ E (1) Paggi,Susana Beatriz José de (1) Vignatti,Alicia María (1) Mais... Palavra-chave Fish predation (2) Allochthonous plant detritus (1) Functional feeding groups (1) Shallow saline lakes (1) Terrestrial and aquatic prey (1) Top down (1) Zooplankton biomass (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Journal article (1) Ano 2012 (1) 2009 (1) País Brazil (1) Chile (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Temporal variations in the diet of the exotic rainbow trout (Oncorhynchus mykiss) in an Andean-Patagonian canopied stream RChHN BURIA,LEONARDO M; ALBARIÑO,RICARDO J; MODENUTTI,BEATRIZ E; BALSEIRO,ESTEBAN G. We examined seasonal and diel variation in prey species composition and biomass in the diet of the exotic rainbow trout Oncorhynchus mykiss (Walbaum, 1972). The study was carried out in the upper-forested sections of a low order stream in Andean-Patagonia. We studied the importance of functional feeding groups of aquatic invertebrates and the relative contribution of terrestrial and aquatic prey items in order to assess the pathways connecting terrestrial and aquatic ecosystems along a stream food web. Trout fed on approximately 40 invertebrate species and scrapers were consistently selected, suggesting their increased vulnerability to predation. However in terms of biomass, rainbow trout diet was mostly composed by shredders which emphasized the role of... Tipo: Journal article Palavras-chave: Allochthonous plant detritus; Fish predation; Terrestrial and aquatic prey; Functional feeding groups. Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2009000100001 Zooplankton richness, abundance and biomass of two hypertrophic shallow lakes with different salinity in central Argentina Biota Neotropica Echaniz,Santiago Andrés; Vignatti,Alicia María; Cabrera,Gabriela Cecilia; Paggi,Susana Beatriz José de. The zooplankton of lakes is controlled by biological and physico-chemical parameters. Among the former, predation by fish can determine the replacement of large-sized species by small-sized ones and among the latter, salinity exerts negative effects on richness and abundance. Since it has been suggested that saline lakes without fishes have higher zooplankton biomass than low salinity ones, the aim of this study was to determine the richness, abundance and biomass of zooplankton in two lakes with different salinity and test the hypothesis that in the presence of zooplanktivorous fishes and at equal concentrations of nutrients and chlorophyll-a, saline lakes have higher biomass than those with low salinity. The study was conducted in two shallow lakes of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Shallow saline lakes; Zooplankton biomass; Fish predation; Top down. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000200005 Registros recuperados: 2 Primeira ... 1 ... Última

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