Diet Comparison of two species of Triportheus in Manso Reservoir and lagoons of Cuiabá River, Mato Grosso do Sul - DOI: 10.4025/actascibiolsci.v25i2.2023

• Autor(a) principal: Galina, André Beal
• Data de Publicação: 2008
• Outros Autores: Hahn, Norma Segatti
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum Biological Sciences
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2023
• topic: Triportheus; dieta; sobreposição alimentar; ambientes lênticos; Mato Grosso; 2.01.00.00-0 Biologia Geral

The aim of this paper is to determine the diet of two species of Triportheus (T. paranensis e T. nematurus), in Manso Reservoir and lagoons of Cuiabá River, MT. Samples were monthly taken from March 2000 to February 2001. Stomach contents were analyzed by the occurrence and volumetric methods, and data were graphically grouped by Costello Index. The diet of T. nematurus was composed of terrestrial (Hymenoptera and Coleoptera) and aquatic insects (larvae of Diptera) in the reservoir. In lagoons it consumed algae and terrestrial insects during the flood period, and the diet was more diversified during the dry season. In the reservoir, T. paranensis consumed specially aquatic invertebrates, while in lagoons its diet was composed of terrestrial insects in dry season and aquatic insects in flood period. Schoener Index presented low values (< 0,6), showing partial segregation in both species diet