2019
DOI: 10.32800/abc.2019.42.0009
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Ontogeny of feeding by Astyanax paris in streams of the Uruguay River Basin, Brazil

Abstract: Ontogeny of feeding by Astyanax paris in streams of the Uruguay River Basin, Brazil. We studied the ontogeny of feeding by Astyanax paris, an insectivorous characid fish from streams of the Uruguay River Basin in southern Brazil. Size-based differences in diet composition were evaluated using permutational multivariate analysis of variance (PERMANOVA). Six streams surveyed over twelve months yielded twenty specimens for analysis of stomach contents. Smaller individuals (SL ≤ 25 mm) consumed mainly aquatic inse… Show more

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“…Other important results indicated higher food intake during the flood season and by larger fish, once the increase of available area for feeding (in the flood period) also offer new habitats for foraging by E. desantanai. Larger fishes also have a larger mouth and consequently they can consume prey that is not available for smaller individuals; moreover, they have higher energy requirements to maintain their metabolism (Quirino et al, 2017;Cavalheiro & Fialho, 2019).…”
Section: Discussionmentioning
confidence: 99%
“…Other important results indicated higher food intake during the flood season and by larger fish, once the increase of available area for feeding (in the flood period) also offer new habitats for foraging by E. desantanai. Larger fishes also have a larger mouth and consequently they can consume prey that is not available for smaller individuals; moreover, they have higher energy requirements to maintain their metabolism (Quirino et al, 2017;Cavalheiro & Fialho, 2019).…”
Section: Discussionmentioning
confidence: 99%