2012
DOI: 10.1590/s0073-47212012000100011
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Abstract: ABSTRACT. An analysis of the diet of Astyanax paranae Eigenmann, 1914 in nine streams located in the Passa-Cinco River basin (upper Paraná River system) was performed to investigate the feeding habits of this species, check for possible spatial variations in diet and to investigate the influence of riparian vegetation in the composition of the diet. Stomach contents of 243 specimens were analyzed by the methods of relative frequency of occurrence and volume, and the diet was characterized by the alimentary in… Show more

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Cited by 19 publications
(16 citation statements)
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“…fasciatus consumed a wide range of food items and there was a predominance of allochthonous resources in the diet, particularly insects and plants, along the longitudinal gradient. Several studies in streams, involving the diet of fish fauna, reveal the importance of allochthonous subsidies to many species (Esteves & Aranha 1999, Lowe-McConnell 1999, Casatti 2002, Silva et al 2012, especially for the genus Astyanax , Borba et al 2008, Wolff et al 2009, Ferreira et al 2011, Ferreira et al 2012, Manna et al 2012. Specifically for A. aff.…”
Section: Discussionmentioning
confidence: 99%
“…fasciatus consumed a wide range of food items and there was a predominance of allochthonous resources in the diet, particularly insects and plants, along the longitudinal gradient. Several studies in streams, involving the diet of fish fauna, reveal the importance of allochthonous subsidies to many species (Esteves & Aranha 1999, Lowe-McConnell 1999, Casatti 2002, Silva et al 2012, especially for the genus Astyanax , Borba et al 2008, Wolff et al 2009, Ferreira et al 2011, Ferreira et al 2012, Manna et al 2012. Specifically for A. aff.…”
Section: Discussionmentioning
confidence: 99%
“…Previous observations show that the availability of allochthonous food resources varies between seasons in tropical streams, increasing the litterfall and benthic stock of allochthonous organic matter in the streams during dry season (França et al, 2009;Gonçalves & Callisto, 2013). However, some studies have found exceptions to this pattern (Novakowski et al, 2008;Ferreira et al, 2012b), as this effect can be masked by the supply of allochthonous organic matter during the entire year in tropical systems (Rocha et al, 2009;França et al, 2009). Accordingly, the fishes' diet in areas with degraded vegetation could show a greater sensitivity to seasonal effects in comparison with fishes' diet in preserved areas (Ferreira et al, 2012a).…”
Section: Feeding Ecologymentioning
confidence: 99%
“…In this sense, such isolation and the integrity of the riparian vegetation influenced the dominance of A. paranae and Phalloceros harpagos. The headwater reaches trend to be influenced by the allochthonous production originated from the riparian vegetation (Vannote et al, 1980), thus favouring the ichthyic species consumers of items carried by the current flow, such as A. paranae (Ferreira, Gerhard, & Cyrino, 2012) and…”
Section: Discussionmentioning
confidence: 99%