The parasites of 45 Serrasalmus rhombeus (Linnaeus, 1776) were collected during the dry season in six floodplain lakes of the Solimões River. The prevalence was 73.3%, the mean intensity 20.5 and the mean abundance 15 crustaceans. Three species of crustaceans parasitized S. rhombeus. Two species of Copepoda infected the gill filaments, Ergasilus yumaricus Malta, 1995 and Myracetyma piraya Malta & Varella, 1993 and one of Branchiura infected the pectoral fin and gill cavity, Argulus chicomendesiMalta & Varella, 2000. Ergasilus yumaricus was the dominant species (92.3%) and the only one that showed significant differences in their abundance among the six lakes sampled. The fishes from Baixio Lake had the highest mean abundance (H = 11.2986, p = 0.04). There was a positive correlation between abundance and the total length of S. rhombeus. There was no correlation between the number...

The present study investigated the presence of helminths in fillets of red piranha, Pygocentrus nattereri (Kner, 1858), with a note of a possible zoonotic potential of its consumption in nature. We examined 40 fish caught in lakes in the floodplain of the Solimões River, located in the municipalities of Coari and Manaus in central Amazonia, Brazil. All fish examined were adults and had yellow cysts in the musculature. Of the 69 cysts found, 66 were identified as metacercariae of Clinostomum marginatum (Braun, 1899) and 3 as Austrodiplostomum compactum (Lutz, 1928). The analysis shows a higher susceptibility of P. nattereri for metacercariae of C. marginatum. The fact that metacercariae were found in fillets of P. nattereri, suggests a risk situation, addresses a concern about its use in raw form. It should not be consumed without proper inspection, processing and freezing, since ceviche...

No obstante la importancia económica de la acuicultura a nivel mundial, existen serias limitantes que frenan su crecimiento; destacando entre ellas las enfermedades causadas por ectoparásitos del grupo Monogenoidea y Protozoa, que en afecciones severas además de restar la calidad al producto, son capaces de reducir la rentabilidad del cultivo; surgiendo la necesidad de un constante monitoreo para diagnosticar y controlar las infecciones parasitarias que puedan afectar la salud y el comportamiento de estos animales. El presente estudio caracterizó la fauna ectoparasitaria presente en alevinos de paiche, Arapaima gigas, cultivados en ambientes controlados de la Amazonía Peruana. Los peces presentaron elevada prevalencia de Dawestrema cycloancistrium (100%), protozoarios Trichodina fariai (82.5%) y Ichthyophthyrius multifiliis (60%). La intensidad parasitaria de Dawestrema cycl...

No obstante la importancia económica de la acuicultura a nivel mundial, existen serias limitantes que frenan su crecimiento; destacando entre ellas las enfermedades causadas por ectoparásitos del grupo Monogenoidea y Protozoa, que en afecciones severas además de restar la calidad al producto, son capaces de reducir la rentabilidad del cultivo; surgiendo la necesidad de un constante monitoreo para diagnosticar y controlar las infecciones parasitarias que puedan afectar la salud y el comportamiento de estos animales. El presente estudio caracterizó la fauna ectoparasitaria presente en alevinos de paiche, Arapaima gigas, cultivados en ambientes controlados de la Amazonía Peruana. Los peces presentaron elevada prevalencia de Dawestrema cycloancistrium (100%), protozoarios Trichodina fariai (82.5%) y Ichthyophthyrius multifiliis (60%). La intensidad parasitaria de Dawestrema cycl...