ABSTRACT
@#Renocila richardsonae Williams & Bunkley-Williams, 1992 is recorded for the first time from Sarawak coastal waters. During a survey of marine fishes at depth of 200 metres in South China Sea, off the coast of Sarawak from 3° to 5°N and 110° to 111°E, five specimens of Renocila richardsonae were collected from Japanese goatfish, Upeneus japonicus (Houttuyn, 1782) (Mullidae) with average prevalence of 17% and mean intensity of one isopod per fish from examination of 64 fish. The isopod was observed to cause tissue damage on the site of attachment to the host.
ABSTRACT
Abstract Most freshwater species of Cymothoidae are distributed in South America. They have mainly been recorded in the eastern and western regions of the Amazon River basin. However, in this ecosystem, the biodiversity of this group may be greater if the entire Amazon basin is considered. In this regard, the aim of the present study was to provide an updated list of isopod species of the family Cymothoidae that are found in fish in the Brazilian Amazon region and to report on new fish host occurrences and expanded geographical distributions for cymothoid isopods that parasitize fish in the southwestern Brazilian Amazon region. The parasites found in fish specimens were collected, fixed and identified later. We found eight species of Cymothoidae parasitizing different host fish species in the southwestern Amazon region. However, we found 14 species of Cymothoidae throughout the Brazilian Amazon region. Three additional species are thus reported here, which increases the number of species of Cymothoidae in this region to 17. These additional species are also new records for Brazil. Therefore, this study has contribute to expand the knowledge about the distribution and diversity of Cymothoidae in the Amazon basin.
Resumo A maioria das espécies de água doce de Cymothoidae está distribuída na Sul e foi registrada principalmente nas regiões Leste e Oeste da bacia do Rio Amazonas. Entretanto, nesse ecossistema, a biodiversidade desse grupo pode ser maior se toda a bacia amazônica for considerada. Nesse sentido, o objetivo do presente estudo foi fornecer uma lista atualizada de espécies de isópodes da família Cymothoidae que são encontrados em peixes na Região Amazônica brasileira e relatar novas ocorrências de peixes hospedeiros, ampliando as distribuições geográficas para isópodes cimotoides que parasitam peixes na região Sudoeste da Amazônia brasileira. Os parasitos encontrados em espécimes de peixes coletados foram analisados e posteriormente identificados. Foram encontradas oito espécies de Cymothoidae parasitando diferentes espécies de peixes hospedeiros na região Sudoeste da Amazônia. No entanto, foram encontradas 14 espécies de Cymothoidae em toda a Região Amazônica brasileira. Três novos relatos de espécies foram observados, o que aumenta o número de espécies de Cymothoidae nessa região para 17. Essas espécies relatadas, também são novos registros para o Brasil. Portanto, este estudo ajudou a expandir o conhecimento sobre a distribuição e diversidade de Cymothoidae na bacia amazônica.
Subject(s)
Animals , Isopoda/classification , Biodiversity , Ectoparasitic Infestations/parasitology , Ectoparasitic Infestations/veterinary , Fish Diseases/parasitology , Fishes/parasitology , Brazil , Rivers , Host Specificity , Animal DistributionABSTRACT
Cymothoidae are big parasites on fishes and often they are host specific. This study reports that in India, the Black pomfret (Parastromateus niger), a highly edible marine fish belonging to the family Carangidae, is the type host of Cymothoa eremita (Isopoda, Cymothoidae). Among one hundred and sixty fish examined from April to July, 2010 in Parangipettai coastal waters, only three female specimens were infested in June, 2010. It seems that such parasitism depends particularly on the season and on the host sex.
ABSTRACT
Anphira branchialisgen. et sp. nov. (Crustacea, Isopoda, Cymothoidae) is described from the dorsal areas of the gill chambers of three species of piranhas (Serrasalmusspp.). The fishes were caught in rivers near Manaus, Amazonas State and on Maracá island, Federal Territory of Roraima, Brasil. The new genus and species is characterized by having large, flat coxal plates on ail 7 pereonites. These plates usually extend beyond the margins of the following segments and the 7th ones extend nearly to the pleotelson and cover the lateral margins of the pleonites. The mandible of this species is rounded, "foot shaped" and without incisor. The mandibular palp is short and stout. The maxillules have 3 terminal and 2 subterminal spines. The pleopods are simple lamellar structures with rounded tips. Evidence is presented that these parasites feed on gill filaments.
Anphira branchialisgen. et sp. nov. (Crustacea, Isopoda, Cymothoidae) aqui descrito é proveniente das áreas dorsais das cavidades branquiais de três espécies de piranhas (Serrasalmusspp.). Os peixes foram capturados em rios nas cercanias de Manaus, Estado do Amazonas e na Ilha de Maracá, no Território Federal de Roraima, Brasil. O novo gênero e espécie caracterizam-se por ter placas coxais grandes e achatadas em todos os 7 pereonitos. Cada uma das placas geralmente ultrapassa a margem do segmento seguinte e as sétimas estendem-se quase até o pleotelso, cobrindo as margens laterais dos pleonitos. A mandíbula desta espécie é arredondada, em "forma de pé" e carece de incisor. O palpo mandibular é curto e forte. As maxíllulas têm três espinhos terminais e dois subterminais. E apresentada evidência sugerindo que estes parasitos comem filamentos branquiais de seus hospedeiros.