2012
DOI: 10.1590/s1679-62252012005000008
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Abstract: This study addressed the feeding ecology of fish fauna from a first-order stream located in a rural area. The purposes were to evaluate the influence of interspecific, seasonal and spatial factors on the diet, examine the dietary overlap, and determine the predominant food sources. Sampling was conducted in December 2007, September 2008, and March 2009, in three 50-m stretches of Itiz stream (upstream, intermediate, and downstream), through electrofishing. A total of 1,102 stomach contents were analyzed from 1… Show more

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Cited by 36 publications
(35 citation statements)
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References 62 publications
(92 reference statements)
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“…schubarti. However, other studies focusing on other species of Imparfi nis, as well as I. schubarti, have confi rmed the results reported here (Ferreira & CasaTTi, 2006;silva et al, 2012). In contrast to the patterns observed for P. taenioptera, the less variable and strictly insectivorous diet exhibited by the studied riffle-dwelling species corroborates previous findings that have highlighted the dominance of insectivorous species with more specialized habitats in riffles (CasaTTi & CasTro, 1998;Teresa & CasaTTi, 2012).…”
Section: Discussionsupporting
confidence: 91%
“…schubarti. However, other studies focusing on other species of Imparfi nis, as well as I. schubarti, have confi rmed the results reported here (Ferreira & CasaTTi, 2006;silva et al, 2012). In contrast to the patterns observed for P. taenioptera, the less variable and strictly insectivorous diet exhibited by the studied riffle-dwelling species corroborates previous findings that have highlighted the dominance of insectivorous species with more specialized habitats in riffles (CasaTTi & CasTro, 1998;Teresa & CasaTTi, 2012).…”
Section: Discussionsupporting
confidence: 91%
“…Despite the low richness (seven species), the trophic structure is comparable to other tropical fish assemblages, for which higher species richness does not necessarily imply the existence of considerable differences in the composition of the food items (Esteves & Lobón-Cerviá, 2001;Silva et al, 2012).…”
Section: Discussionmentioning
confidence: 83%
“…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%
“…The headwaters region is influenced by the surrounding vegetation, which contributes with allochthonous material (plant material and terrestrial insects), as the stream enlarges, decreases the importance of importing terrestrial organic matter. The riparian vegetation is well documented in the literature as a major supplier of food for aquatic organisms (Vannote et al 1980, Polis et al 1997, Baxter et al 2005, Manna et al 2012, Silva et al 2012, in turn controlling the flow of nutrients. The shading produced by riparian vegetation limits the autotrophic production, and fish depend on resources from the slopes for feeding (Lowe-McConnell 1999).…”
Section: Discussionmentioning
confidence: 99%