Novos registros de helmintofauna em Hoplias malabaricus (Bloch, 1794) (Characiformes, Erythrinidae) na bacia do rio Paraibuna

Abstract

This study aimed to classify and measure the body structures of nematodes and acanthocephalans parasitising Hoplias malabaricus (trahira) from three batches of the Coleção Helmintológica Odile Bain, owned by the Laboratório de Taxonomia e Ecologia de Helmintos, localised in Universidade Federal de Juiz de Fora, collected in the São Pedro dam, in the city of Juiz de Fora. This goal was achieved by the making of semi-permanent microscope slides using lactophenol, and the specimens were analysed using a light microscope with camera lucida and one light microscope with differential interference contrast (DIC). The nematodes were classified as stage 3 Pseudoterranova sp. larvae, and the acanthocephalans were classified as members of the subfamily Hypoechinorhynchinae. The study concluded that the freshwater fish parasite biodiversity is not completely known yet, and that future studies about the helminthological groups described in this study are needed, in order to consolidate these parasites population dynamics.