Hoshino Maria Danielle Figueiredo Guimarães, Neves Lígia Rigôr, Tavares-Dias Marcos
Programa de Pós-graduação em Biodiversidade Tropical, Universidade Federal do Amapá, Universidade Federal do Amapá, Macapá AP , Brasil, Programa de Pós-graduação em Biodiversidade Tropical - PPGBIO, Universidade Federal do Amapá - UNIFAP, Macapá, AP, Brasil.
Programa de Pós-graduação da Rede de Biodiversidade e Biotecnologia da Amazônia Legal, Universidade Federal do Amapá, Universidade Federal do Amapá, Macapá AP , Brasil, Programa de Pós-graduação da Rede de Biodiversidade e Biotecnologia da Amazônia Legal - Bionorte, Universidade Federal do Amapá - UNIFAP, Macapá, AP, Brasil.
Rev Bras Parasitol Vet. 2016 Jun 14;25(2):207-16. doi: 10.1590/S1984-29612016038.
This study investigated the parasite communities of wild Acestrorhynchus falcatus and Acestrorhynchus falcirostris populations living in sympatry in Brazilian Amazon. In these two hosts, a total of 12 parasite species e 1-9 parasite species were found per fish, and 10 of these species are metazoans. Eight species of parasites were common to both host species and four of them exhibited differences in abundance and/or prevalence. Parasite communities of the hosts were taxonomically similar (83%) and composed of both ectoparasites and endoparasites, and characterized by high prevalence and high abundance of endoparasites and an aggregated dispersion pattern. For A. falcirostris, the dominant parasite was Ichthyophthirius multifiliis, and for A. falcatus, it was Piscinoodinium pillulare. Shannon diversity and Berger-Parker dominance were similar for both hosts, while the parasites species richness and evenness showed differences influenced by the ectoparasites species. These two populations of hosts that inhabited the same geographical area had different sizes, but were exposed to the same infective stages, and acquired qualitatively and quantitatively similar endoparasites community, thus indicating that the amounts and types of prey congeneric that they were eating were similar. Therefore, the overlap in the same occurrence area play an important role in the parasite communities to these phylogenetically related hosts.
本研究调查了生活在巴西亚马逊地区同域分布的野生镰吻魮和镰嘴魮种群的寄生虫群落。在这两种宿主中，每条鱼共发现12种寄生虫和1 - 9种寄生虫，其中10种为后生动物。两种宿主共有8种寄生虫，其中4种在丰度和/或流行率上存在差异。宿主的寄生虫群落分类相似（83%），由外寄生虫和内寄生虫组成，其特征是内寄生虫的高流行率和高丰度以及聚集分布模式。对于镰嘴魮，优势寄生虫是多子小瓜虫，对于镰吻魮，优势寄生虫是球形淀粉卵涡鞭虫。两种宿主的香农多样性和伯杰 - 帕克优势度相似，而寄生虫物种丰富度和均匀度受外寄生虫物种影响存在差异。这两个生活在同一地理区域的宿主种群大小不同，但接触相同的感染阶段，并获得了定性和定量相似的内寄生虫群落，因此表明它们所食用的同类猎物的数量和种类相似。因此，在同一分布区域的重叠对这些系统发育相关宿主的寄生虫群落起着重要作用。
