Gautam N Kumari, Misra P Kumar, Saxena A Murari
Department of Zoology, University of Lucknow, Lucknow-226007, Lucknow U. P. India.
Department of Applied Animal Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow-226025, Lucknow, U. P. India.
Helminthologia. 2018 Jul 28;55(3):230-239. doi: 10.2478/helm-2018-0020. eCollection 2018 Sep.
Snakehead fishes are widely consumed throughout South East Asia, China and India because of their good taste of meat and high nutrient values such as presence of prostaglandins, thromboxane and Omega-6 fatty acid. Parasitic infection constitutes significant economic loss in fish production. The aim of this work was to study the seasonal variation of helminths in snakeheads. In the presented study, a three-year survey has been performed. A total of 1013 individuals of and 247 individuals of were examined. A total of 3783 helminths were collected, with an average of 3.02 helminths/fish. 43.50 % individuals of . and 59.10 % of . were found to be infected with acanthocephalans, trematodes, nematodes and cestodes per year. The prevalence and mean abundance of sp. was at its peak in summer. However the prevalence of trematodes, nematodes and cestodes was at peak during autumn. Mean abundance of nematodes was at peak in summer. Interestingly, the males were found more infected as compared to the females and the infection rate in males peaked in summer. In comparison to other weight groups, medium size hosts (21 - 40 g) were found more consistently infected. Thus the results indicate that there are seasonal variations in parasitic helminths infecting . and . which also depend upon sex and weight. These variations may be attributed to various environmental and biological factors including parasite life cycle and immune level of host.
由于肉味鲜美且具有较高的营养价值，如含有前列腺素、血栓烷和欧米伽-6脂肪酸，黑鱼在东南亚、中国和印度被广泛食用。寄生虫感染给鱼类生产造成了重大经济损失。这项工作的目的是研究黑鱼体内蠕虫的季节性变化。在本研究中，进行了为期三年的调查。共检查了1013尾乌鳢和247尾斑鳢。共收集到3783条蠕虫，平均每条鱼有3.02条蠕虫。每年分别有43.50%的乌鳢和59.10%的斑鳢被棘头虫、吸虫、线虫和绦虫感染。乌鳢的感染率和平均丰度在夏季达到峰值。然而，吸虫、线虫和绦虫的感染率在秋季达到峰值。线虫的平均丰度在夏季达到峰值。有趣的是，发现雄性比雌性感染更严重，且雄性的感染率在夏季达到峰值。与其他体重组相比，中等大小的宿主（21 - 40克）被发现感染更为持续。因此，结果表明，感染乌鳢和斑鳢的寄生蠕虫存在季节性变化，这也取决于性别和体重。这些变化可能归因于各种环境和生物因素，包括寄生虫的生命周期和宿主的免疫水平。
