Quality and digestibility of food ingested by various trophic fish groups in the Upper Paraná River floodplain

Esper Amaro de Faria, Anna Christina; Benedito, Evanilde

dc.creator	Esper Amaro de Faria, Anna Christina
dc.creator	Benedito, Evanilde
dc.date	2009-10-02
dc.date.accessioned	2016-05-03T15:36:12Z
dc.date.available	2016-05-03T15:36:12Z
dc.identifier	http://revistas.ucr.ac.cr/index.php/rbt/article/view/3180
dc.identifier	10.15517/rbt.v59i1.3180
dc.identifier.uri	https://hdl.handle.net/10669/27639
dc.description	Determining quality of food ingested and digestibility can be helpful in understanding the mechanisms that determine trophic plasticity, which is the ability of a given species to use a more advantageous food source at a given time. In this study, the chemical composition and digestibility of food ingested by various trophic fish groups at different sites of the Upper River Paraná floodplain are evaluated. Specimens of Pseudoplatystoma corruscans, Prochilodus lineatus, Leporinus friderici, Pterodoras granulosus and Schizodon borellii from the Baía, Ivinheima and Paraná Rivers and from Fechada and Ventura Lagoons were taken as samples (3-16cm-mesh net). Volume participation analyses of food items were determined and contents from the stomach and the intestine?s latter quarter were removed for bromatological analysis (energy, crude protein, ash and dry matter). Internal marker acid-insoluble ash was employed for apparent digestibility coefficients. P. lineatus and P. corruscans had an intake with lower and higher energy and crude protein contents, respectively. P. corruscans had slight variations in food items and composition, whereas P. granulosus had the greatest variation. Whereas P. lineatus had the highest apparent digestibility coefficients in energy, S. borellii showed least variation in diet. P. granulosus and P. lineatus had the higher percentages of dry matter in the stomach in the Paraná River, whereas P. corruscans had similar use in the Baía Rivers and Ventura Lagoon. S. borellii showed low utilization of germanous energy. It may be concluded that the site determined the variation in quality and use of diet by L. friderici, P. granulosus and S. borellii. The generalist species L. friderici demonstrated a good use of different food items ingested at the site; likewise, the generalist species P. corruscans had a similar diet and the same use of food. Rev. Biol. Trop. 59 (1): 85-101. Epub 2011 March 01.	en-US
dc.format	application/pdf
dc.language	eng
dc.publisher	Universidad de Costa Rica	en-US
dc.rights	Copyright (c) 2014 International Journal of Tropical Biology and Conservation	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 59 (1) March 2011	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 59 (1) March 2011	es-ES
dc.source	Revista Biología Tropical; Vol. 59 (1) March 2011	pt-PT
dc.source	2215-2075
dc.source	0034-7744
dc.source	10.15517/rbt.v59i1
dc.title	Quality and digestibility of food ingested by various trophic fish groups in the Upper Paraná River floodplain	en-US
dc.title	Quality and digestibility of food ingested by various trophic fish groups in the Upper Paraná River floodplain	es-ES
dc.type	artículo original
dc.coverage	CRC	en-US

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