Endoparasite fauna of Brycon amazonicus and B. melanopterus(Characidae, Bryconinae) from Negro and Solimões rivers, Amazon, Brazil

Abstract

Congeneric host species present similar biological and behavioral aspects, what may favor the presence of a similar parasite fauna. The aim of the present study was to compare the composition and structure of the parasite community from congeneric species, Brycon amazonicus and B. melanopterus, collected on the Negro and Solimões Rivers. The fish internal organs were longitudinally opened and analyzed under stereomicroscope. The examination revealed that B. amazonicus was parasitized by Procamallanus (Spirocamallanus) inopinatus (26.7% and 35.5%), Contracaecum type 2 (10% and 16.13%) and Rhabdochona acuminata (0% and 3.23%), prevalence values for Negro and Solimões River, respectively. The analysis of B. melanopterus, a fish species found only in the Solimões River, revealed P. (S.) inopinatus (33.3%), Contracaecum type 1 (60%) and R. acuminata (3.34%). These results indicate that the taxonomic proximity of the hosts was a stronger influence on the parasite species than external host environment. KEYWORDS: Negro River, Solimões River, 'matrinxã', metazoan parasites, nematode. Fauna endoparasitária deBrycon amazonicus e B. melanopterus (Characidae, Bryconinae) dos rios Negro e Solimões, Amazônia, Brasil RESUMO Espécies hospedeiras congenéricas apresentam aspectos biológicos e comportamentais semelhantes, o que pode favorecer a presença de uma fauna de parasitas semelhantes. O objetivo do presente estudo foi comparar a composição e a estrutura da comunidade parasitária de espécies congêneres, Brycon amazonicus e B. melanopterus, coletados nos rios Negro e Solimões. Os órgãos internos dos peixes foram longitudinalmente abertos e analisados com o auxílio de estereomicroscópio. O exame revelou que B. amazonicus foi parasitada por Procamallanus (Spirocamallanus) inopinatus (26,7% e 35,5%), tipo Contracaecum 2 (10% e 16,13%) e Rhabdochona acuminata (0% e 3,23%), os valores de prevalência para os rios Negro e Solimões, respectivamente. A análise de B. melanopterus, uma espécie de peixe encontradas somente no Rio Solimões, revelou P. (S.) inopinatus (33,3%), Contracaecum tipo 1 (60%) e R. acuminata (3,34%). Estes resultados indicam que a proximidade taxonômica dos hospedeiros foi uma influência mais forte sobre as espécies de parasitas do que ambiente externo ao peixe. PALAVRAS-CHAVE: Rio Negro, Rio Solimões, parasitos metazoários, 'matrinxã', nematóides. ACTAAMAZONICA Endoparasite fauna of Brycon amazonicus and B. melanopterus (Characidae, Bryconinae) from Negro and Solimões rivers, Amazon, Brazil

<b>Fish parasite diversity in the Amambai river, State Mato Grosso do Sul, Brazil

“…The species Rabdochona acuminate was the only component of the parasite fauna of Auchenipterus osteomistax, representing 100% of the specimens collected. This nematode was reported from A. osteomistax by Tavernari et al (2009) and in other hosts in other studies, such as Astyanax fasciatus, A. bimaculatus and Geophagus brasiliensis (Paraguassú & Luque, 2007), Cichla kelberi (Santos-Clapp & Brasil-Sato, 2014) and Brycon amazonicus and B. melanopterus (Ribeiro, Ueda, Pavanelli, & Takemoto, 2016).…”

Helminth endoparasites of endemic fish Pygocentrus piraya (Characiformes, Serrasalmidae) from Três Marias reservoir, Minas Gerais, Brazil

“…Austrodiplostomum sp., P. (S.) inopinatus and Contracaecum sp. were the common species shared by both endoparasitic fauna; they are generalist species that often parasitize several fish species belonging to different orders in different regions (São-Sabas & Brasil-Sato 2014, Santos-Clapp & Brasil-Sato 2014, Monteiro et al 2016, Ribeiro et al 2016, Almeida-Berto et al 2018, Fujimoto et al 2018, Fernandes et al 2019. Representatives of Acanthocephala and Pentastomida were not found in the endoparasitic fauna observed in P. piraya fish living in upper São Francisco river.…”

Acidentes Por Picadas De Escorpiões No Estado De São Paulo (2007-2018): Análise Por Modelos Aditivos Generalizados

“…Acestrorhynchus falcirostris (Cuvier, 1819) AP HOSHINO et al, 2016 Brycon amazonicus (Spix & Agassiz, 1829) AM RIBEIRO et al, 2016 Brycon melanopterus (Cope, 1872) AM RIBEIRO et al, 2016 Triportheus angulatus (Spix & Agassiz, 1829) AP OLIVEIRA et al, 2016 Brachyplatystoma filamentosum (Lichtenstein, 1819) PA RODRIGUES et al, 2015 Brachyplatystoma rousseauxii (Castelnau, 1855) PA RODRIGUES et al, 2015 Trachelyopterus galeatus (Linnaeus, 1766) AP PANTOJA et al, 2016 Trachelyopterus coriaceus (Valenciennes, 1840) AP PANTOJA et al, 2016 AP -Amapá; PA: Para; TO: Tocantins; AM: Amazonas.…”