02114naa a2200229 a 450000100080000000500110000800800410001910000230006024501460008326000090022952013930023865000180163165000200164965000140166965000240168365300110170765300200171865300140173865300200175270000210177277300910179320471962017-03-13       2016    bl uuuu     u00u1 u    #d1 aOLIVEIRA, M. S. B.  aCommunities of parasite metazoans in Piaractus brachypomus (Pisces, Serrasalmidae) in the lower Amazon River (Brazil).h[electronic resource]  c2016  aThe aim of this study was to investigate the component community of parasite metazoans of Piaractus brachypomus in the lower Amazon River, northern Brazil. From 34 necropsied fish, 27,384 metazoan parasites were collected, such as Anacanthorus spathulatus, Mymarothecium viatorum and Notozothecium janauachensis (Monogenoidea); Spectatus spectatus and Contracaecum sp (Nematoda); Clinostomum marginatum and Dadaytrema oxycephala (Digenea); and Argulus carteri and Ergasilus sp. (Crustacea). The dominant species was S. spectatus followed by monogenoidean species, and there was aggregated dispersion of parasites, except for D. oxycephala and Contracaecum sp., which presented random dispersion. Positive correlation among the abundance of the three monogenoideans species were found, thus indicating that there was no competition between the species of these parasites on the gills of hosts. The abundances of some parasite species showed positive correlations with the size of the hosts, but the condition factor of the fish was not affected by the parasitism levels. It showed that this host had a metazoan community characterized by high species richness of metazoans, low evenness and high diversity of parasites, with prevalence of endoparasites, including larval stages. This was the first record of C. marginatum, A. carteri, Ergasilus sp. and Contracaecum sp. for P. brachypomus.  aendoparasites  afreshwater fish  ahelminths  aPeixe de água doce  aAmazon  aAnimal parasite  aDiversity  aParasito animal1 aTAVARES-DIAS, M.  tBrazilian Journal of Veterinary Parasitologygv. 25, n. 2, p. 151-157, abr./jun. 2016.