Martins M L, Marchiori N, Nunes G, Rodrigues M P
Laboratório de Sanidade de Organismos Aquáticos, Departamento de Aquicultura, UFSC, Florianópolis, SC, Brazil.
Braz J Biol. 2010 Aug;70(3):637-44. doi: 10.1590/s1519-69842010000300022.
This study characterises morphologically Trichodina heterodentata Duncan, 1977 from channel catfish, Ictalurus punctatus (Rafinesque, 1818) in the State of Santa Catarina, Brazil. Body and gill smears were air-dried at room temperature, impregnated with silver nitrate and/or stained with Giemsa. Ten characteristics were selected to compare the present material with other morphological characterisations of T. heterodentata. Prevalence rate was 100%, mean intensity 89,333.70 (3,125 to 299,100 parasites per host). Trichodina heterodentata was considered medium-sized trichodinid with mean body diameter 59.4 +/- 8.5 microm, denticulate ring 38.5 +/- 4.5 microm, adhesive disc 60.2 +/- 6.7 microm diameter and 24.4 +/- 1.6 denticles. In relation to previous reports of T. heterodentata this material resembles in 90% of the analysed characters. This work confirms the biometrical variation that exists in the different populations of T. heterodentata. A list of hosts and comparative measurements of T. heterodentata are presented and the channel catfish is considered a new host.
本研究对采自巴西圣卡塔琳娜州斑点叉尾鮰（Ictalurus punctatus，拉芬斯克，1818年）的异齿车轮虫（Trichodina heterodentata Duncan，1977年）进行了形态学特征描述。体表和鳃涂片在室温下空气干燥，用硝酸银浸染和/或吉姆萨染色。选择了10个特征来将本研究材料与异齿车轮虫的其他形态学特征进行比较。感染率为100%，平均感染强度为89333.70（每尾宿主有3125至299100个寄生虫）。异齿车轮虫被认为是中型车轮虫，平均体径为59.4±8.5微米，齿环为38.5±4.5微米，附着盘直径为60.2±6.7微米，有24.4±1.6个齿。与之前关于异齿车轮虫的报道相比，本研究材料在90%的分析特征上与之相似。这项工作证实了异齿车轮虫不同种群中存在的生物统计学变异。列出了异齿车轮虫的宿主列表和比较测量数据，斑点叉尾鮰被认为是一种新宿主。
