Changes in diet of a neotropical cichlid in response to river damming

• Main Authors: Monica Bueno Jorge, Maria José Alencar Vilela, Yzel Rondon Suarez, Sidnei Eduardo Lima Junior
• Format: Article
• Language: English
• Published: Universidade Estadual de Maringá 2019-04-01
• Series: Acta Scientiarum : Biological Sciences
• Subjects: aquatic ecology; environmental impacts; laetacara araguaiae; reservoir; upper paraná river; brazil.
• Online Access: http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/43880

Changes in diet of Laetacara araguaiae Ottoni and Costa, 2009 were evaluated in the Sucuriú River (Upper Paraná basin, Brazil) in an area with a small hydroelectric power plant, both before and after the formation of the reservoir, in order to answer: Did the construction of the reservoir affected the diet of this species? The results showed greater change of diet composition in the upstream section of the reservoir. It was observed that before the formation of the reservoir and the first year after, the individuals from upstream section formed a group characterized by an insectivorous diet. With the dam construction and habitat change we observed that aquatic plant material, sediment, and algae predominated in the diet. These results show the opportunistic feeding habit of L. araguaiae and contribute to the understanding of how the impoundment of rivers can influence the trophic dynamics of the ichthyofauna.