2016
DOI: 10.1590/1982-0224-20150178
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Diet-morphology relationship in the stream-dwelling characid Deuterodon stigmaturus (Gomes, 1947) (Characiformes: Characidae) is partially conditioned by ontogenetic development

Abstract: We tested whether interindividual variations in diet composition within a population of Deuterodon stigmaturus can be explained by morphological differences between individuals, and whether diet-morphology relationships are dependent on the ontogenetic development. We analyzed diet of 75 specimens sampled in a coastal stream of Southern Brazil. Variation in stomach content was summarized with a Principal Coordinate Analysis (PCoA). The retained PCoA axes were tested as response to standard length (SL), and to … Show more

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Cited by 8 publications
(10 citation statements)
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References 34 publications
(67 reference statements)
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“…Individuals of different sizes can generally differ in their diets due to morphological limitations during periods of development (Abelha et al, 2001;Dala Corte et al, 2016). In our study, there was a dominance of young specimens (8 to 33cm) because the Amazon River mouth is known as a nursery or growth area for L. dorsalis, a migatory fish that reproduce in upstream areas of Amazonas River (Goulding, 1980).…”
Section: Discussionmentioning
confidence: 54%
“…Individuals of different sizes can generally differ in their diets due to morphological limitations during periods of development (Abelha et al, 2001;Dala Corte et al, 2016). In our study, there was a dominance of young specimens (8 to 33cm) because the Amazon River mouth is known as a nursery or growth area for L. dorsalis, a migatory fish that reproduce in upstream areas of Amazonas River (Goulding, 1980).…”
Section: Discussionmentioning
confidence: 54%
“…Mobility and higher competition capacity have often been cited as the aspects of larger fish prey selectivity (Russo et al, 2014). From this perspective, the ontogenetic shifts in the diet of A. paris can be viewed as a trophic strategy to reduce intraspecific competition, as seen in other Neotropical freshwater fish (Bonato and Fialho, 2014;Cavalheiro and Fialho, 2016;Dala-Corte et al, 2016).…”
Section: Discussionmentioning
confidence: 99%
“…The differential use of food resources is a wellknown intraspecific strategy to avoid trophic niche overlap between juveniles and adults in several freshwater fish species (Bonato and Fialho, 2014;Cavalheiro and Fialho, 2016;Dala-Corte et al, 2016). Some species may therefore concentrate on different food resources at different stages of their development (Rudolf and Lafferty, 2011).…”
Section: Introductionmentioning
confidence: 99%
“…Bonato et al 2017). Dala-Corte et al (2016) detectaram mudanças no comprimento padrão e do intestino de um lambari em um riacho costeiro do sul do Brasil, que podem ser individuais ou responder a variações no ambiente. Bonato et al (2017) observaram que a posição da boca e número de dentes podem estar relacionados ao tamanho dos itens capturados ou a uma dieta rica em vegetais, insetos aquáticos ou terrestres.…”
Section: Variações Na Dieta E Morfologiaunclassified
“…Russo et al 2002). Estudos têm demonstrado variação ontogenética na dieta de peixes onívoros, com predomínio de itens animais na dieta dos indivíduos jovens, e de vegetais nos adultos (Vitule et al 2008, Dala-Corte et al 2016. Esse padrão acentua a onivoria na espécie, sendo, portanto, importante considerar o tamanho dos indivíduos nas amostras, pois diferenças na dieta da espécie podem estar refletindo variações ontogenéticas.…”
Section: Variações Na Dieta E Morfologiaunclassified