Tripathi Priyanka, Agrawal Nirupama, Pant Rashmi, Agrawal Girdhar G
J Parasit Dis. 2010 Apr;34(1):24-8. doi: 10.1007/s12639-010-0008-1. Epub 2010 Oct 21.
The parasitic microhabitat distribution of the monogenoideans Thaparocleidus wallagonoius Jain, 1952, Mizelleus indicus Jain, 1957and T. gomtius Jain, 1957 parasitizing the gills of a fresh-water demersal Wallago attu and their seasonal variations were investigated in the present study. The microhabitat preferences of these species were observed. The gill segments and gill areas were the most important factors segregating the monogenoidean parasites on gills, not their abundance. Low niche overlap was found within each of the four gill arches and parasites were segregated in the same microhabitats within each gill arch. The distribution of parasites was independent of the left or right side of gill. The distribution plots in our study indicated that the anterior segment of first and fourth gill arches were more preferred site of infection. Seasonal variation of parasites, recorded during 2006 & 2007, in male and female hosts was also investigated. Due to ectoparasitic nature and high host specificity exhibited by the species of monogenoidea, studies on their seasonal dynamics are very significant as they could contribute significantly to the understanding of their biological adaptations to their environment.
本研究调查了寄生于淡水底栖鱼类怀氏野鲮（Wallago attu）鳃上的单殖吸虫——1952年发现的瓦氏塔帕吸虫（Thaparocleidus wallagonoius Jain）、1957年发现的印度米氏吸虫（Mizelleus indicus Jain）和1957年发现的戈姆蒂米氏吸虫（T. gomtius Jain）的寄生微生境分布及其季节变化。观察了这些物种对微生境的偏好。鳃段和鳃区是区分鳃上单殖吸虫寄生虫的最重要因素，而非其丰度。在四个鳃弓中的每一个内都发现了低生态位重叠，并且寄生虫在每个鳃弓内的相同微生境中被分隔开。寄生虫的分布与鳃的左侧或右侧无关。我们研究中的分布图表明，第一和第四鳃弓的前段是更易感染的部位。还调查了2006年和2007年期间在雄性和雌性宿主中记录的寄生虫季节变化。由于单殖吸虫种类具有外寄生性质和高宿主特异性，对其季节动态的研究非常重要，因为它们可以极大地有助于理解其对环境的生物适应性。
