Abstract：
Fish parasites are an important part of aquatic biodiversity and knowing these species and their interactions with their hosts helps in monitoring the aquatic biota. The present study investigated the ectoparasite crustacean fauna of ten fish species from the upper Araguari River, in the state of Amapá, northern Brazil. A total of 508 fish were collected and analyzed from July to November 2014, of which 82.6% (109) were parasitized by one or more crustacean ectoparasite species. In the ten host fish species, a total of 308 ectoparasite specimens were collected, from 12 taxa, such as Argulus multicolor Stekhoven, 1937, Argulus spinulosus Silva, 1980, Argulus sp.1, Argulus sp.2, Argulus sp.3, Dipteropeltis sp., Dipteropeltis hirundo Calman, 1912, Dolops bidentata Bouvier, 1899, Dolops striata Bouvier, 1899 (Argulidae), Braga fluviatilis Richardson, 1911, Braga amapaensis Thatcher, 1996 (Cymothoidae) and Excorallana berbicensis Boone, 1918 (Corallanidae). Higher levels of prevalence and abundance were recorded for Hoplias aimara (Valenciennes, 1847) and Tometes trilobatus Valenciennes, 1850, respectively. These ectoparasites were found in the fins, integument, mouth, and anus of the host fish. Argulus sp.2 and D. bidentata were the most abundant parasites (65.1%), and had the highest species richness. This study registered 36 novel host-parasite interactions, and thus represents a new record for all host species here examined.
摘要：
鱼类寄生虫是水生生物多样性的重要组成部分，了解这些物种及其与宿主的相互作用有助于监测水生生物群。本研究调查了阿拉瓜河上游的十种鱼类的外寄生虫甲壳类动物区系，在阿马帕州,巴西北部。2014年7月至11月共采集并分析了508条鱼，其中82.6％（109）被一种或多种甲壳类外寄生虫物种寄生。在十种寄主鱼类中，共收集了308个外寄生虫标本，来自12个分类单元，比如Argulus多色Stekhoven，1937年，阿古鲁斯刺客席尔瓦，1980年，Argulussp.1，Argulussp.2，Argulussp.3，Dipteropeltissp。,DipteropeltishirundoCalman,1912年，多洛普斯·比登塔塔·布维尔，1899年，DolopsstriataBouvier，1899年（Argulidae），布拉加FluviatilisRichardson,1911年，撒切尔夫人，1996年（Cymothoidae）和ExcorallanaberbicensisBoone，1918年（珊瑚科）。Hopliasaimara（Valenciennes，1847年）和托梅特斯三叶巴伦西亚，1850年，分别。这些体外寄生虫是在鳍中发现的，长存,嘴，和寄主鱼的肛门。Argulussp2和D.bidentata是最丰富的寄生虫（65.1％），物种丰富度最高。这项研究记录了36种新型宿主-寄生虫相互作用，因此代表了这里检查的所有宿主物种的新记录。
