On the diet of two endemic and rare species of Trichomycterus (Ostariophysi: Trichomycteridae) in the Jordão River, Iguaçu River basin, southern Brazil

Authors

  • Almir Petersen Barreto
  • Fabiane Cristina Armiliato
  • Vanessa Maria Ribeiro
  • Vinícius Abilhoa

DOI:

https://doi.org/10.7213/estud.biol.7848

Keywords:

Catfish, Feeding ecology, Freshwater fish, Neotropics

Abstract

The diet and the eect of body size on the feeding habits of Trichomycterus crassicaudatus and Trichomycterus stawiarski, collected in the Jordão River, an import tributary of the Iguaçu River basin, were investigated. Samples were collected in august 2003 during the Jordão River Energetic Complex Aquatic Fauna Rescue and Monitoring program. Stomach contents were evaluated through the frequency of occurrence, permutational multivariate analysis of variance (PERMANOVA), si-milarity percentage analysis (SIMPER) and non-metric multidimensional scaling analysis (MDS) methods. A total of 86 stomach contents of T. stawiarski and 36 of T. crassicaudatus were assessed. The species presented an insectivorous feeding habit, with differences in the diet composition of the “smallest” and the “largest” individuals. Ephemeroptera nymphs, lar-vae and pupae of Diptera, organic detritus and plant fragments were the most important food items. Both species feeding habits were based mainly in benthic aquatic immature insects.

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Published

2013-11-27

How to Cite

Barreto, A. P., Armiliato, F. C., Ribeiro, V. M., & Abilhoa, V. (2013). On the diet of two endemic and rare species of Trichomycterus (Ostariophysi: Trichomycteridae) in the Jordão River, Iguaçu River basin, southern Brazil. Revista Estudos De Biologia, 35(84). https://doi.org/10.7213/estud.biol.7848

Issue

Section

Fluxo Contínuo