Lapera Ivan Moura, Silva Ana Carolina da, Canônico Bruno Marreto, Perezin Gabriela de Farias, Tebaldi José Hairton, Pala Gabriela, Manrique Wilson Gómez, Hoppe Estevam Guilherme Lux
Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil.
Centro de Aquicultura da UNESP - CAUNESP, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil.
Rev Bras Parasitol Vet. 2017 Apr-Jun;26(2):143-151. doi: 10.1590/S1984-29612017035.
This study focused on the characterization and analysis of communities and infra-communities of metazoan parasites of Plagioscion squamosissimus caught in Promissão Reservoir in the Tietê River in Borborema (21°39'58"S, 49°8'49"W), state of São Paulo, Brazil. Fifty adult specimens caught by professional fishermen in March 2015 were necropsied. The fish presented an average standard length of 25.2 ± 2.2 cm and average weight of 328.82 ± 89.03 g. A total of 5,227 specimens of metazoan parasites were collected: 2,880 (55.1%) adult Diplectanum piscinarius (Monogenoidea: Diplectanidae) and 2,347 (44.9%) Austrodiplostomum compactum metacercariae (Digenea, Diplostomidae), both with 100% prevalence and mean abundance of 57.6 and 46.9, respectively. Parasite diversity was low (species richness = 2), with a Simpson index (D) equal to 0.505, and low values of Brillouin (HB = 0.687) and Margalef diversity (I = 0.117) indices. Berger-Parker's index of dominance (p = 0.551) indicated a slight dominance of the monogenean parasite D. piscinarius. There was a positive correlation, assessed by Pearson coefficient between parasite abundance of D. piscinarius and standard length (r = 0.43) and weight (r = 0.51) of hosts.
本研究聚焦于对巴西圣保罗州博尔博雷马市铁特河普罗米西奥水库捕获的巴西须鲷体内后生动物寄生虫群落及亚群落的特征描述与分析。2015年3月，专业渔民捕获了50条成年巴西须鲷并进行解剖。这些鱼的平均标准体长为25.2 ± 2.2厘米，平均体重为328.82 ± 89.03克。共收集到5227个后生动物寄生虫标本：2880个（55.1%）成年鱼类双盘吸虫（单殖亚纲：双盘科）和2347个（44.9%）紧凑澳双穴吸虫囊蚴（复殖亚纲，双穴科），二者的感染率均为100%，平均丰度分别为57.6和46.9。寄生虫多样性较低（物种丰富度 = 2），辛普森指数（D）为0.505，布里渊指数（HB = 0.687）和马加莱夫多样性指数（I = 0.117）的值也较低。伯杰 - 帕克优势度指数（p = 0.551）表明单殖吸虫类寄生虫鱼类双盘吸虫有轻微优势。通过皮尔逊系数评估发现，鱼类双盘吸虫的寄生虫丰度与宿主的标准体长（r = 0.43）和体重（r = 0.51）之间存在正相关。
