Pinheiro Raul Henrique da Silva, Tavares-Dias Marcos, Giese Elane Guerreiro
Programa de Pós-graduação em Biologia de Agentes Infecciosos e Parasitários, Instituto de Ciências Biológicas, Universidade Federal do Pará - UFPA, Belém, PA, Brasil.
Laboratório de Histologia e Embriologia Animal, Instituto da Saúde e Produção Animal, Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil.
Rev Bras Parasitol Vet. 2019 Jul 29;28(3):425-431. doi: 10.1590/S1984-29612019052.
This study compared the structure of helminth parasite communities in two populations of Astronotus ocellatus from two localities in Pará State, eastern Amazon (Brazil). Hosts from the Tapajós River were infected by Posthodiplostomum sp. metacercarie, larvae of Contracaecum sp. and Pseudoproleptus sp., with predominance of Contracaecum sp. Hosts from Iara Lake were infected by Procamallanus spiculastriatus, Proteocephalus sp. and Acanthocephala gen. sp., with predominance of P. spiculastriatus. Parasites had an aggregated dispersion and there were differences in Shannon diversity index and the evenness between both host populations, because the parasite component community showed no similarity. The existence of variation in infracommunity and community of parasites for A. ocellatus from different localities indicates the presence of an uneven distribution in terms of species and density of parasites, as well as of intermediate hosts in the localities surveyed.
本研究比较了来自巴西亚马逊东部帕拉州两个地点的两群眼点丽鱼（Astronotus ocellatus）体内蠕虫寄生虫群落的结构。来自塔帕若斯河的宿主感染了后双盘吸虫属（Posthodiplostomum sp.）囊蚴、对盲囊线虫属（Contracaecum sp.）幼虫和假原单殖吸虫属（Pseudoproleptus sp.），其中对盲囊线虫属占主导。来自伊阿拉湖的宿主感染了尖棘原线虫（Procamallanus spiculastriatus）、头槽绦虫属（Proteocephalus sp.）和棘头虫属（Acanthocephala gen. sp.），其中尖棘原线虫占主导。寄生虫呈聚集分布，两个宿主种群的香农多样性指数和均匀度存在差异，因为寄生虫组成群落没有相似性。不同地点的眼点丽鱼寄生虫群落内群落和群落存在差异，这表明在所调查的地点，寄生虫种类和密度以及中间宿主的分布不均衡。
