Vasconcelos Huann Carllo Gentil, Sá-Oliveira Júlio César, Salomão Débora da Conceição Oliveira, Tavares-Dias Marcos
Departamento de Biologia, Universidade Federal do Amapá - UNIFAP, Macapá, AP, Brasil.
Embrapa Amapá, Macapá, AP, Brasil.
Rev Bras Parasitol Vet. 2020 Jun 26;29(2):e001820. doi: 10.1590/S1984-29612020040. eCollection 2020.
This study investigated the fauna of ectoparasitic crustaceans in Leporinus affinis from Reservoir Coaracy Nunes, in eastern Amazon (Brazil), as well as the parasite-host interactions. The mouth, gills and tegument of 50.9% of the fish examined were parasitized by Argulus chicomendesi, Ergasilus turucuyus and Excorallana berbicensis, and a total of 118 parasites were collected. The dominance was found for E. berbicensis and the higher infestation levels were caused by E. berbicensis on the body surface of the hosts, but E. turucuyus had the highest prevalence on the gills of this host. The cluster analysis revealed higher similarity in the infestations by E. berbicensis and A. chicomendesi in relation to infestation site in hosts. Host sex and relative condition factor (Kn) were not influenced by moderate parasitism, but the abundance of parasites presented negative correlation with weight and Kn of the fish. This is the first study on the parasites of L. affinis showing low species diversity, with moderate prevalence and low parasite abundance.
本研究调查了巴西亚马逊东部科拉西·努内斯水库的阿氏兔脂鲤体表寄生甲壳动物的动物区系，以及寄生虫与宿主的相互作用。在所检查的鱼中，50.9%的鱼的口腔、鳃和体表被奇科门德氏鱼虱、图鲁库尤斯鱼蛭和贝氏外珊瑚虱寄生，共收集到118只寄生虫。发现贝氏外珊瑚虱占优势，宿主体表较高的感染水平是由贝氏外珊瑚虱引起的，但图鲁库尤斯鱼蛭在该宿主鳃上的感染率最高。聚类分析显示，贝氏外珊瑚虱和奇科门德氏鱼虱在宿主感染部位的感染情况具有较高的相似性。宿主性别和相对状况因子（Kn）不受中度寄生的影响，但寄生虫数量与鱼的体重和Kn呈负相关。这是关于阿氏兔脂鲤寄生虫的首次研究，显示出物种多样性低、感染率中等且寄生虫数量少的特点。
