Chotnipat Soranot, Miller Terrence L, Knuckey Richard M, Hutson Kate S
Centre for Sustainable Tropical Fisheries and Aquaculture, College of Marine and Environmental Sciences, James Cook University, Townsville, QLD 4811, Australia.
Dis Aquat Organ. 2015 Apr 8;113(3):195-205. doi: 10.3354/dao02848.
Infections with monogeneans of the Diplectanidae can limit productivity of and cause considerable health issues for fish in aquaculture. To date, 9 species of diplectanids have been reported from the Asian sea bass or barramundi Lates calcarifer (Perciformes: Latidae) in the Asia-Pacific region. This study characterised the diplectanid parasite fauna found infecting wild and farmed barramundi from 5 localities in tropical Australia, including north Queensland and Western Australia. A combination of morphometric and comparative genetic analyses of partial 28S ribosomal RNA (28S rRNA) from specimens recovered were used to confirm their identity and to explore relationships with other diplectanids. These data revealed that a single, dominant species of diplectanid, Laticola paralatesi, infects wild and farmed Lates calcarifer in tropical Australia. Laticola lingaoensis Yang, Kritsky, Sun, Jiangying, Shi & Agrawal, 2006 is synonymised with L. seabassi (Wu, Li, Zhu & Xie, 2005) Domingues & Boeger, 2008 based on the combination of the host infected (Lates calcarifer), geographic distribution, distinct morphological similarity, and identical 28S rRNA sequence data identified here. Laticola seabassi is now designated as the type species of Laticola due to nomenclatural priority.
双盘吸虫科单殖吸虫感染会限制水产养殖中鱼类的生产力，并引发严重的健康问题。迄今为止，在亚太地区的尖吻鲈（或盲鰽，尖吻鲈科：尖吻鲈属）中已报告有9种双盘吸虫。本研究对从澳大利亚热带地区5个地点（包括昆士兰州北部和西澳大利亚州）采集的野生和养殖尖吻鲈体内发现的双盘吸虫寄生虫区系进行了特征描述。通过对所采集标本的形态测量以及对部分28S核糖体RNA（28S rRNA）进行比较基因分析，来确认其身份，并探索与其他双盘吸虫的关系。这些数据表明，在澳大利亚热带地区，一种单一的优势双盘吸虫物种——副尖吻鲈拉克吸虫（Laticola paralatesi）感染野生和养殖的尖吻鲈。基于本研究确定的宿主（尖吻鲈）、地理分布、明显的形态相似性以及相同的28S rRNA序列数据，2006年的陵水拉克吸虫（Laticola lingaoensis Yang, Kritsky, Sun, Jiangying, Shi & Agrawal）被认定为2008年多明格斯和伯格描述的海鲈拉克吸虫（L. seabassi (Wu, Li, Zhu & Xie, 2005) Domingues & Boeger）的同物异名。由于命名优先权，海鲈拉克吸虫现被指定为拉克吸虫属的模式种。
