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Abstract：
Fisheries play a crucial role in aquatic ecosystems, a resource with ecological and economic importance. Measuring parasite prevalence is necessary to assess these fish species\' health and well-being. Within the Sistan region, this study sought to estimate the prevalence and intensity of infection with plerocercoid Ligula intestinalis (L. intestinalis) in seven fish species and identify factors such as fish weight, seasonality, and fishing location that might influence infection rates. 2800 fish from seven species were obtained in the Sistan region throughout four seasons. Fish samples from three weight categories (<200gr, 200-400gr, 400gr<) were examined parasitologically. Ligula intestinalis was detected in 96/2800 (3.4%) of fishs. There was a variation in prevalence among fish species. Alburnus charusini (A. charusini), Hypophthalmichthys molitrix (H. molitrix), Hypophthalmichthys nobilis (H. nobilis), and Schizocypris altidorsalis (S. altidorsalis) showed no infection. Schizothorax zarudnyi (S. zarudnyi) showed a prevalence of 1.5% (6/400), Cyprinus carpio (C. carpio) 15% (60/400), and Ctenopharyngodon idella (C. idella) 7.5% (30/400). It was found that infection prevalence was significantly influenced by fish weight in C . carpio and C . idella. A higher prevalence was found in fish with lower weight. Infection rates significantly fluctuated with season across species, but fishing locations had no significant difference. The present study highlights the significant prevalence of L. intestinalis infections in fish populations within Iran\'s Sistan region, underscoring the need for ongoing monitoring and research to inform effective fishery management strategies. Future studies should focus on long-term monitoring efforts and consider the broader global context of fish parasitology to understand parasite-host interactions better and inform conservation measures worldwide.
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UNASSIGNED:
摘要：
渔业在水生生态系统中起着至关重要的作用，具有生态和经济重要性的资源。测量寄生虫的患病率对于评估这些鱼类的健康和福祉是必要的。在锡斯坦地区，这项研究试图估计plerococoridligulatelinalis感染的患病率和强度（L.肠）在七个鱼类中，并确定诸如鱼类体重等因素，季节性,以及可能影响感染率的捕鱼地点。在整个四个季节中，在Sistan地区获得了来自七个物种的2800条鱼。来自三个重量类别的鱼样品(<200gr，200-400gr,400gr<）进行了寄生虫学检查。在96/2800（3.4％）的鱼类中检测到肠膜。鱼类之间的患病率有所不同。阿尔本努斯·查鲁西尼(A.charusini),下眼畸形（H.molitrix)，下眼病(H.nobilis)，和尖囊裂果(S.Altidorsalis）未显示感染。Schizothoraxzarudnyi(S.zarudnyi)的患病率为1.5%(6/400)，鲤鱼(C.carpio)15%(60/400)，和鼻咽喉虫(C.idella）7.5%（30/400）。发现感染患病率受C中鱼体重的显着影响。Carpio和C.艾黛拉.在体重较低的鱼类中发现了较高的患病率。不同物种的感染率随季节显著波动，但捕鱼地点没有显著差异。本研究强调了伊朗锡斯坦地区鱼类种群中肠道乳杆菌感染的显著患病率，强调需要不断监测和研究，以告知有效的渔业管理战略。未来的研究应侧重于长期监测工作，并考虑鱼类寄生虫学的更广泛的全球背景，以更好地了解寄生虫与宿主的相互作用，并为全球的保护措施提供信息。
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