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首页> 外文期刊>Parasitology Research >Parasite fauna of farmed Nile tilapia (Oreochromis niloticus) and African catfish (Clarias gariepinus) in Uganda
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Parasite fauna of farmed Nile tilapia (Oreochromis niloticus) and African catfish (Clarias gariepinus) in Uganda

机译：乌干达养殖的尼罗罗非鱼（Oreochromis niloticus）和非洲cat鱼（Clarias gariepinus）的寄生虫动物区系

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An intensive parasite survey was conducted in 2008 to better understand the parasite fauna occurrence, distribution and diversity in the commercial aquaculture fish species in Uganda. A total of 265 fish collected from hatcheries and grow-out systems were examined for parasites using routine parasitological techniques. The survey yielded 17 parasite species: 11 from Oreochromis niloticus and ten from Clarias gariepinus. Four parasites—Amirthalingamia macracantha, Monobothrioides sp., Zoogonoides sp. and a member of the family Amphilinidae—were recorded for the first time in the country. The parasite diversity was similar between hosts; however, O. niloticus was dominated by free-living stage-transmitted parasites in lower numbers, whereas both trophically and free-living stage-transmitted parasites were equally represented in C. gariepinus in relatively high intensities. The patterns in parasite numbers and composition in the two hosts reflect differences in fish habitat use and diet. A shift in parasite composition from monoxenous species-dominated communities in small-sized fish to heteroxenous in large fishes was recorded in both hosts. This was linked to ontogenetic feeding changes and prolonged exposure to parasites. Polyculture systems showed no effect on parasite intensity and composition. The gills were highly parasitized, mainly by protozoans and monogeneans. Generally, the occurrence and diversity of parasites in these fish species highlight the likelihood of disease outbreak in the proposed intensive aquaculture systems. This calls for raising awareness in fish health management among potential farmers, service providers and researchers.
机译：2008年进行了一次密集的寄生虫调查，以更好地了解乌干达商业水产养殖鱼类中寄生虫的动物种类，分布和多样性。使用常规寄生虫学技术检查了从孵化场和成年系统收集的总共265条鱼的寄生虫。该调查产生了17种寄生虫物种：11种来自尼罗罗非鱼（Oreochromis niloticus），另外10种来自Clarias gariepinus。四个寄生虫-Amirthalingamia macracantha，Monobothrioides sp。，Zoogonoides sp.。和该家族的Amphilinidae成员–在该国首次被记录。寄主之间的寄生虫多样性相似。然而，尼罗罗非鱼以较低数量的自由生活阶段传播的寄生虫占主导地位，而营养和自由生活阶段传播的寄生虫均以较高的强度在加里氏梭菌中均等地代表。两种寄主中寄生虫数量和组成的模式反映了鱼类栖息地使用和饮食的差异。在两个寄主中均记录到寄生虫组成从小型鱼类中的单性物种占主导的社区向大型鱼类中的异性迁移。这与个体喂养的改变和长期接触寄生虫有关。混养系统对寄生虫的强度和组成没有影响。 were高度寄生，主要是原生动物和单基因动物。通常，这些鱼类中寄生虫的发生和多样性突出了建议的集约化水产养殖系统中疾病暴发的可能性。这要求在潜在的农民，服务提供者和研究人员之间提高对鱼类健康管理的认识。

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