Composição e estrutura da infracomunidade de metazoários parasitas da sardinha-papuda Triportheus angulatus (Spix e Agassiz, 1829) do lago Catalão, rio Solimões, Amazônia brasileira

Abstract

A total of 86 Triportheus angulatus specimens were collected during four expeditions during the months of May, July and September, November 2015, in the Catalão floodplain lake located near Manaus, Amazonas. A total of 1.106 individuals corresponding to 14 parasites of tree taxa Monogenoidea, Nematoda and Copepoda. In this work, T. angulatus is host type for eight species of Monogenoidea: Anacanthorus acuminatus, A. chaunophallus, A. chelophorus, A. euryphallus, A. lygophallus, A. pithophalus, Ancistrohaptor falciferum, A. falcunculum, and one of Nematoda, Procamallanus (Spirocamallanus) inopinatus. And new definitive host for three species of Monogenoidea, Jainus sp. n. 1, Monogenoidea gen. nov. 1 and Rhinoxenus anaclaudiae and one of Copepoda Ergasilus triangularis. Triportheus angulatus is a new paratenic host for Anisakis sp. The most parasitized organ was the gills with the Monogenoidea group, with greater richness and abundance of species. The three secondary species were Jainus sp n 1, Monogenoidea gen nov 1 and A. chellophorus, respectively. The other 11 species were satellites, and there was no record of central species in T. angulatus. Triportheus angulatus is an opportunistic omnivorous fish and had a mean intensity of the parasitic infracommunity of endoparasites (IM = 2.55 ± 0.18) lower than that of ectoparasites (IM = 12.29 ± 2.16). The correlations between parasite intensity and standard host length were strongly positive, as well as the average abundance between the high and low water periods were also significant through the Wilcoxcon test.