Helminth parasites of Ctenosciaena gracilicirrhus (Perciformes: Sciaenidae) from the coast of Angra dos Reis, Rio de Janeiro State, Brazil Helmintos parásitos de Ctenosciaena gracilicirrhus (Perciformes: Sciaenidae) de la costa de Angra dos Reis, del estado de Rio de Janeiro, Brasil

Abstract

During a survey of the helminth parasites of Ctenosciaena gracilicirrhus from the Atlantic Ocean, off Angra dos Reis, Rio de Janeiro State, Brazil, 10 species of metazoan parasites were collected: 1 species of Monogenea (Choricotyle rohdei); 3 species of Nematoda (Hysterothylacium sp. third stage larvae, Raphidascaris sp. third stage larvae, and Procamallanus (Spirocamallanus) pereirai third and fourth stages larvae and adults); 6 species of Digenea (Opecoeloides pedicathedrae, Opecoeloides melanopteri, Diplomonorchis leiostomi, Aponurus laguncula, Parahemiurus merus and Manteriella sp.). Choricotyle rohdei and Hysterothylacium sp. had the highest prevalence, mean intensity and abundance and an aggregated pattern of distribution was observed in both species. A positive correlation between the standard length of hosts and the parasitic abundance of Hysterothylacium sp. and C. rohdei was observed. The prevalence of C. rohdei was positively correlated with standard length of the host, while in Hysterothylacium sp. there was no correlation. Ctenosciaena gracilicirrhus represents a new host record to all species of Nematoda and Digenea presented herein. The genus Manteriella is reported for the first time in South America.<br>Durante un estudio de los helmintos de Ctenosciaena gracilicirrhus de la zona costera de Angra dos Reis, Rio de Janeiro, Brasil, 10 especies de parásitos metazoos fueron recolectados: 1 especie de Monogenea (Choricotyle rohdei); 6 de Digenea (Opecoeloides pedicathedrae, Opecoeloides melanopteri, Diplomonorchis leiostomi, Aponurus laguncula, Parahemiurus merus y Manteriella sp.); 3 nemátodos (Hysterothylacium sp. y Raphidascaris sp., ambas larvas de tercer estadio y Procamallanus (Spirocamallanus) pereira, larvas de tercer y cuarto estadios y adultos). Choricotyle rohdei y Hysterothylacium sp. presentaron la mayor prevalencia, intensidad media y abundancia, así como un patrón agregado de distribución. Se observó una correlación positiva entre la longitud estándar de los hospederos y la abundancia parasitaria de Hysterothylacium sp. y C. rohdei. La prevalencia de Choricotyle rohdei se relaciona positivamente con la longitud estándar del huésped, mientras que en Hysterothylacium sp., no hubo correlación. Ctenosciaena gracilicirrhus representa un nuevo registro de huésped para todas las especies de Digenea y Nematoda registrados en este trabajo. El género Manteriella se registra por primera vez en América del Sur

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oai:doaj.org/article:c06a057802284fd7ab15377411ed99d7Last time updated on 12/17/2014

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