Acosta A A, Queiroz J, Brandão H, Silva R J
Departamento de Parasitologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brazil.
Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brazil.
Braz J Biol. 2015 Jan-Mar;75(1):242-50. doi: 10.1590/1519-6984.15113.
This study assessed the helminth fauna of Astyanax fasciatus in two distinct sites of the Taquari River, São Paulo State, with 30 individuals sampled in a lotic site and 30 in a lentic site, recording the monogeneans: Cacatuocotyle paranaensis, Characithecium costaricensis, Diaphorocleidus kabatai, Jainus sp., Notozothecium sp. and Gyrodactylus sp., the digenean Antorchis lintoni and no-identified metacercariae; the nematode Procamallanus (Spirocamallanus) inopinatus and no-identified larvae. The mean abundances of total monogeneans (U = 1053; p = 0.042) and C. costaricensis (U = 1107; p = 0.005) were higher in the lotic site. This difference may be due to the higher density of the host population in the lotic site, and the water transparence in lentic environments that prevents A. fasciatus to form shoals, precluding the exchange of parasites with direct cycle within a host population. This study is the first report of the helminth fauna of A. fasciatus in the Taquari River, with ten taxa recorded, and reports A. fasciatus as a new host for Notozothecium sp. and C. paranaensis.
本研究评估了圣保罗州塔夸里河两个不同地点的条纹丽脂鲤的蠕虫区系，在一个急流区域采集了30个个体，在一个静水区域采集了30个个体，记录到的单殖吸虫有：巴拉那卡氏吸虫、哥斯达黎加丽脂鲤虫、卡氏双盘虫、贾努斯属吸虫、诺托吸虫属吸虫和三代虫属吸虫，复殖吸虫有林氏前睾吸虫和未鉴定的后尾蚴；线虫有意外原线虫和未鉴定的幼虫。急流区域的总单殖吸虫（U = 1053；p = 0.042）和哥斯达黎加丽脂鲤虫（U = 1107；p = 0.005）的平均丰度更高。这种差异可能是由于急流区域宿主种群密度较高，以及静水区域的水透明度阻止了条纹丽脂鲤形成鱼群，从而排除了寄生虫在宿主种群内直接循环交换的可能性。本研究是塔夸里河条纹丽脂鲤蠕虫区系的首次报告，记录了10个分类单元，并报告条纹丽脂鲤是诺托吸虫属吸虫和巴拉那卡氏吸虫的新宿主。
