Chagas De Souza Darlison, Nogueira Adília, Corrêa Lincoln Lima
Programa de Pós-graduação em Biodiversidade (PPGBEES), Instituto de Ciências e Tecnologia das Águas - ICTA, Universidade Federal do Oeste do Pará. Avenida Mendonça Furtado, nº 2946, Fátima, CEP 68040-470, Santarém, PA, Brazil.
Instituto Nacional de Pesquisas da Amazônia – INPA, Coordenação de Biodiversidade (CBIO) Laboratório de Fisiologia Comportamental e Evolução (LFCE), Av. André Araújo, 2936 - Campus I, Petrópolis - Manaus, AM, Brazil
Ann Parasitol. 2020;66(1):101–106. doi: 10.17420/ap6601.243.
Gymnotiformes are currently recognized as electric fish, the vast majority of which emit low power electrical discharges. Clinostomum trematodes have been the subject of numerous investigations in several host species due to the ability of metacercariae of this genus to infect the muscles, fins and internal organs of fish. The present study aimed to record, for the first time, the occurrence of parasitism by Clinostomum marginatum in Gymnotiformes from the natural environments of two tributaries of the Amazon River in the Brazilian Amazon. Two specimens of Gymnotus coropinae, ten specimens of Brachyhypopomus brevirostris, two specimens of Gymnorhamphycthys petiti and one specimen of Microsternarchus bilineatus were captured. Infection with C. marginatum was identified in the form of 12 encysted metacercariae in the epidermis, with a prevalence of 0.1%, a mean infection intensity of 12/fish and an average abundance of 1.2. This is the first record of parasitism by the C. marginatum in South American Gymnotiformes of the B. brevirostris species.
裸背电鳗目目前被认为是电鱼，其中绝大多数会发出低功率电脉冲。由于该属尾蚴能够感染鱼类的肌肉、鳍和内脏器官，口吸盘属吸虫一直是多个宿主物种中众多研究的对象。本研究旨在首次记录巴西亚马逊地区亚马逊河两条支流自然环境中裸背电鳗目鱼类感染缘口吸盘吸虫的情况。捕获了2条科罗皮纳裸背电鳗、10条短吻新电鳗、2条佩氏裸臀电鳗和1条双线微电鳗。在表皮中发现了12个包囊尾蚴形式的缘口吸盘吸虫感染，感染率为0.１%，平均感染强度为12个/鱼，平均丰度为1.2。这是缘口吸盘吸虫寄生于南美短吻新电鳗属裸背电鳗目的首次记录。
