Fauna endoparasitária da espécie Psalidodon fasciatus (Cuvier, 1819) do Parque Estadual de Vila Velha

Abstract

The following research had its objective the identification of the fish species endoparasitic fauna Psalidon fasciatus (Cuvier, 1819) from Parque Estadual de Vila Velha (PEVV), into the region of Campos Gerais, being recognized for its importance in environmental conservation and for its unique characteristics of the original Natural Fields of Paraná. At PEVV, populations of Psalidon fasciatus (Cuvier, 1819) are geographicaly isolated, living in doliform depressions populary known as furnas. The research has been performed with Psalidon fasciatus species from Furna 2 and from Lagoa Dourada. The methodology used was by ichthyological collection that occurred between february 2019 and january 2020, being done the necropsy of 347 species, 253 from Furna 2 and 94 from Lagoa Dourada. Two different parasitic species genus have been found, Rhabdochona and Spinitectus. The species found on Furna's 2 fishes were Rhabdchona cubensis and Rhabdchona acuminata and on Lagoa Dourada fishes were Spinitectus rodolphiheringi. The results shows bigger prevalence, mean abundance and relative dominance of Rhabdochona acuminata in the P. fasciatus fishes. The relative condition factor means kn of the Furna's 2 Psalidon fasciatus shows negative allometric growth (b = 2,3), in other words, more energy was used on the growth process instead of weight gain. The relative condition factor means kn of the Lagoa Dourada shows the opposite, with positive allometric growth (b=2,5). In this study, only nematoids has been found on both environment. The species found on Furna 2 are different from the Lagoa Dourada parasitic species.