Estudo morfológico de microparasitas em Astyanax bimaculatus Linnaeus, 1758 (Characidae, tetragonopterinae) capturados no município de Salvaterra, ilha de Marajó - PA

Abstract

The present study reports on aspects of light microscopy by mixosporídios and microsporídios encontrandos parasitizing fish teleosteans, With the purpose of analyzing morphologically the microparasitas in Astyanax bimaculatus, Collected in Rio Paracuarai, Municipality of Salvaterra, State of Pará, Brazil. The prevalence of infection was of 86,66% per Henneguya and 20% by Ellipsomyxa, both in the gallbladder. In the gills was 80% infection in straws and 20% of microsporídios celomática cavity. The spores presented total length of 32,2 ± 38,61μm, Fusiform body measuring 22,32 ± 22,35μm of length and 7,43±8,53μm of width, Presented by measuring tapered tails 13,98 ± 15,55μm. The spores presented two polar capsules with 8,71±12,2μm of length and 2,22±3,33o μm of width, containing a polar filament provisions helically between 15-17 laps. The studies on transmission electron microscopy and molecular biology are being performed for confirmation of new species of parasites found in the organs of the host.