Dieta de Astyanax asuncionensis (Characiformes, Characidae), em riachos da bacia do rio Cuiabá, Estado do Mato Grosso - DOI: 10.4025/actascibiolsci.v30i1.1442

Cristiana da Silva Borba; Rosemara Fugi; Angelo Antonio Agostinho; Gisele Caroline Novakowski

doi:10.4025/actascibiolsci.v30i1.1442

**Diet of Astyanax asuncionensis (Characiformes, Characidae), in streams of the Cuiabá river basin, Mato Grosso State** - DOI: 10.4025/actascibiolsci.v30i1.1442

Authors

Cristiana da Silva Borba Author
Rosemara Fugi UEM Author
Angelo Antonio Agostinho UEM Author
Gisele Caroline Novakowski UEM Author

DOI:

https://doi.org/10.4025/actascibiolsci.v30i1.1442

Keywords:

Astyanax asuncionensis, dieta, amplitude do nicho, bacia do rio Cuiabá

Abstract

The goal of this study was to assess the diet of A. asuncionensis in four streams. Fish samples were carried out monthly from January to December 2003, using electrofishing. Stomach contents of 213 individuals were analyzed, and the diet was described as for occurrence and volumetric percentage of each item combined in a feeding index (IAi). The diet composition, importance of allochthonous and autochthonous resources, and diet breadth (Levin’s index) were assessed among streams and between seasons (dry and rainy). The diet was composed of 22 feeding items; allochthonous resources (especially insects) dominated the diet in all streams and in both seasons. The highest values of diet breadth were recorded, in general, during the rainy period. These results showed that A. asuncionensis populations are supported by terrestrial food (especially Hymenoptera), indicating the importance of riparian vegetation. Considering that streams differ according to riparian vegetation cover, our results indicate that the maintenance of vegetation and recovery of degraded areas are essential for conservation of this fish species in these streams

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Author Biography

Rosemara Fugi, UEM

Possui graduação em Ciências Biológicas pela Universidade Estadual de Maringá (1986) , mestrado em Ecologia e Recursos Naturais pela Universidade Federal de São Carlos (1994) , doutorado em Ecologia e Recursos Naturais pela Universidade Federal de São Carlos (1998) e pos-doutorado pela Mississippi State University (2005) . Atualmente é Biólogo da Universidade Estadual de Maringá. Tem experiência na área de Ecologia , com ênfase em Ecologia de Ecossistemas. Atuando principalmente nos seguintes temas: lambaris, alimentação, bacia do rio Iguaçu, espécies endêmicas de água doce Currículo Lattes

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Published

2008-03-28

Issue

Vol. 30 No. 1 (2008)

Section

Ecology and Limnology

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How to Cite

Diet of Astyanax asuncionensis (Characiformes, Characidae), in streams of the Cuiabá river basin, Mato Grosso State - DOI: 10.4025/actascibiolsci.v30i1.1442. (2008). Acta Scientiarum. Biological Sciences, 30(1), 39-45. https://doi.org/10.4025/actascibiolsci.v30i1.1442