2005
DOI: 10.1590/s0044-59672005000100010
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Alimentação e ecomorfologia de duas espécies de piranhas (Characiformes: Characidae) do lago de Viana, estado do Maranhão, Brasil

Abstract: RESUMOSerrasalmus aff. brandtii e Pygocentrus nattereri são duas espécies de piranhas comuns no Lago de Viana, um lago formado a partir das inundações do Rio Pindaré, tributário da margem esquerda do Rio Mearim. Uma amostra composta por 249 exemplares destas espécies foi estudada a fim de identificar a composição da dieta e as estratégias alimentares empregadas pelas duas. Os peixes foram coletados trimestralmente durante um ano, entre março de 1998 e março de 1999, usando redes de emalhar e tarrafas. A compos… Show more

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Cited by 29 publications
(27 citation statements)
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“…Since the niche is multidimensional, resource partitioning may be not experienced in the type of consumed preys, but in other dimensions like prey size, different use of space and/ or phenotypic characteristics that allow subtle differences in the use of available resources (Esteves and Aranha 1999;Piorski et al 2005;Brazil-Sousa et al 2009). Furthermore, when considering average values of resource use within a population we ignore the fact that the individuals composing the same population may use different resources, minimizing an apparent competition between species.…”
Section: Discussionmentioning
confidence: 99%
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“…Since the niche is multidimensional, resource partitioning may be not experienced in the type of consumed preys, but in other dimensions like prey size, different use of space and/ or phenotypic characteristics that allow subtle differences in the use of available resources (Esteves and Aranha 1999;Piorski et al 2005;Brazil-Sousa et al 2009). Furthermore, when considering average values of resource use within a population we ignore the fact that the individuals composing the same population may use different resources, minimizing an apparent competition between species.…”
Section: Discussionmentioning
confidence: 99%
“…The following morphological measurements were quantified following Piorski et al (2005) and Mazzoni et al (2010) Resource partitioning and ecomorphological variation in two syntopic species of Lebiasinidae (Characiformes) in an Amazonian stream ACTA AMAZONICA (consuming few items in large quantities), indicate a high influence of the between-phenotype component in the niche width of both species (Figure 2). Hymenoptera (especially Formicidae) was the only item consumed by a little more than 50% of the population of C. nigrofasciata, but in low abundance (Figure 2a).…”
Section: Ecomorphologymentioning
confidence: 99%
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“…Studies on morphology of Neotropical freshwater fish are restricted to the comparison between morphology and diet (Piorski et al 2005, Teixeira & Bennemann 2007, morphological variations under different environmental conditions (Monteiro & Neves 2003), and ecomorphology of fish from streams (Casatti & Castro 2006, Ferreira 2007. However, studies on the morphology associated with swimming performance for the Neotropical fish species are non-existent, with only information available for two migratory species, Leporinus reinhardti and Pimelodus maculatus, on swimming speeds and determination of swimming performance in the studies conducted by Santos et al (2007Santos et al ( , 2008.…”
Section: Introductionmentioning
confidence: 99%