Franceschini Lidiane, Zago Aline Cristina, Zocoller-Seno Maria Conceição, Veríssimo-Silveira Rosicleire, Ninhaus-Silveira Alexandre, da Silva Reinaldo José
Programa de Pós-graduação em Ciências Biológicas (Zoologia), Instituto de Biociências, Universidade Estadual Paulista - UNESP, BotucatuSP, Brasil, Programa de Pós-graduação em Ciências Biológicas (Zoologia), Instituto de Biociências, Universidade Estadual Paulista - UNESP, Botucatu, SP, Brasil.
Departamento de Biologia e Zootecnia, Universidade Estadual Paulista - UNESP, Ilha SolteiraSP, Brasil, Departamento de Biologia e Zootecnia, Universidade Estadual Paulista - UNESP, Ilha Solteira, SP, Brasil.
Rev Bras Parasitol Vet. 2013 Oct-Dec;22(4):475-84. doi: 10.1590/S1984-29612013000400006.
Fifty specimens of Cichla piquiti were collected from the Paraná River downstream of the Ilha Solteira Hydroelectric Power Station in Brazil and surveyed for endohelminth parasites. All fish were parasitised by at least one helminth species (overall prevalence [P] = 100%). Eight parasite taxa were present: the nematode Procamallanus (Procamallanus) peraccuratus in the intestines; third-stage larvae of the anisakids Contracaecum sp. and Hysterothylacium sp. in the visceral cavity, mesentery and serosa of the stomach and intestines and on the liver and spleen; the trematodes Austrodiplostomum compactum in the eye (metacercariae) and Genarchella genarchella in the stomach; and the cestodes Proteocephalus macrophallus, Proteocephalus microscopicus, and Sciadocephalus megalodiscus in the intestines. Hysterothylacium sp. larvae (P = 86%) and P. microscopicus (P = 74%) were the most prevalent parasites. Anisakids were more prevalent and abundant in the dry season. A negative correlation between the abundances of Hysterothylacium sp. and P. microscopicus was observed, suggesting a competitive/antagonistic relationship between these parasites. Cichla piquiti represents a new host for four parasite species. These new records significantly increase the list of parasites of C. piquiti, contributing to the knowledge of the host-parasite relationship and the geographical distribution of these helminths.
从巴西伊利亚索尔泰拉水电站下游的巴拉那河采集了50份皮氏丽鱼样本，对其体内的内寄生虫进行调查。所有鱼类均感染了至少一种蠕虫物种（总体感染率[P]=100%）。共发现8个寄生虫分类单元：肠道中的线虫精确原线虫；异尖线虫属的对盲囊线虫和宫脂线虫的第三期幼虫，存在于胃和肠道的内脏腔、肠系膜和浆膜以及肝脏和脾脏上；眼部的吸虫致密澳双盘吸虫（后囊蚴）和胃中的吉氏吉氏吸虫；以及肠道中的头槽绦虫、小头头槽绦虫和巨盘裂头绦虫。宫脂线虫幼虫（P=86%）和小头头槽绦虫（P=74%）是最常见的寄生虫。异尖线虫在旱季更为常见且数量更多。观察到宫脂线虫和小头头槽绦虫的丰度之间呈负相关，表明这些寄生虫之间存在竞争/拮抗关系。皮氏丽鱼是4种寄生虫物种的新宿主。这些新记录显著增加了皮氏丽鱼的寄生虫种类清单，有助于了解宿主 - 寄生虫关系以及这些蠕虫的地理分布。
