Larvas de nematoides e cestoides de importí­¢ncia higiênico-sanitária em Lopholatilus villarii (Actinopterygii) no Estado do Rio de Janeiro, Brasil

Abstract

LARVAS DE NEMATOIDES E CESTOIDES DE IMPORTÂNCIA HIGIÊNICO-SANITÁRIA EM Lopholatilus villarii (ACTINOPTERYGII) NO ESTADO DO RIO DE JANEIRO, BRASILPalavras-chave: Malacanthidae; Anisakidae; Raphidascarididae; Trypanorhyncha. ABSTRACTThe tile fish, Lopholatilus villarii, occurs from Brazil to Argentina where it is commercially important it because possesses highly appreciated meat. The aim of this study was to identify the larvae of anisakid and raphidascaridid nematodes and trypanorhynch cestodes in L. villarii purchased in fish markets of the municipality of Niterói, state of Rio de Janeiro, Brazil, and calculate their parasitological indices and present their sites of infection. From August 2015 to September 2016, 31 specimens of L. villarii were investigated. The fish were necropsied and their viscera and musculature analyzed. The helminths found were processed according to standard helminthological techniques for taxonomic identification. Of 31 fish analyzed, 28 (90.3%) were parasitized with larvae of anisakid and raphidascaridid nematodes, Anisakis sp., Terranova sp., Pseudoterranova sp. and Hysterothylacium deardorffoverstreetorum (L 3 and L 4 ) and plerocercus of the trypanorhynch cestode Otobothrium sp. Their parasitological indices were calculated. The helminths parasitized mainly the serosas of intestine, stomach and liver, and H. deardorffoverstreetorum was also parasitizing the abdominal musculature of one fish. This is the first report of anisakid and raphidascaridid nematodes and trypanorhynch cestodes in L. villarii. Hygienic-sanitary aspects were discussed.

The hidden companion of non‐native fishes in north‐east Atlantic waters

“…Another species from the genus Hysterothylacium , H. deardorffoverstreetorum , was the only parasite detected in P. octolineatum . This species was first described parasitizing the flounder Paralichthys isosceles (Jordan, 1891) from Brazilian coast (Knoff et al, ), and it has also been found afterwards in many other Brazilian fishes (Di Azevedo & Iñiguez, ; Kuraiem et al, ; Silva, Knoff, Felizardo, Gomes, & Sao Clemente, ). Therefore, this also represents a first record for this nematode species in the eastern Atlantic.…”