PDF(Pubmed)
Abstract：
Rastrelliger brachysoma (Bleeker, 1851), the short mackerel, is a dietary staple and of significant economic demand in Southeast Asia and Thailand. However, the demand for short mackerel has precipitated an overfishing crisis, leading to a depletion of fish stocks. Overfishing, coupled with parasitism, may result in a decline in the population of R. brachysoma. Digenetic trematode infection is prevalent in marine fish and has a considerable impact on the overall health of the fish. Here, to identify digenetic trematodes infecting R. brachysoma, we aim to determine the identity, prevalence, and intensity of digenean infections in R. brachysoma from the Gulf of Thailand. A total of 194 short mackerel were obtained from Chon Buri Province, where digeneans were isolated and identified. The molecular identity of the digeneans was confirmed using the nuclear 28S rRNA gene. Of the 194 short mackerel, 100% were found to be infected with digeneans, comprising of Lecithocladium, Prodistomum, Opechona, and Aphanurus. Lecithocladium was the most prevalent (98%) and had the highest intensity of infection (37 mean intensity), followed by Prodistomum (75% prevalence and 17 mean intensity). Our study thus presents the first evidence of digeneans infecting the economically important short mackerel from the Gulf of Thailand. The high infection rate of digenetic trematodes may have implications on the health of R. brachysoma, further driving their population decline. These data underscore the importance of safeguarding fisheries resources in the Gulf of Thailand, and downstream conservation efforts are crucial for evidence-based management decisions to safeguard the long-term sustainability of fish resources.
摘要：
拉斯特利格腕部淋巴瘤(布列克，1851),短鲭鱼,是东南亚和泰国的主食和巨大的经济需求。然而,对短鲭鱼的需求引发了过度捕捞危机，导致鱼类资源枯竭。过度捕捞,再加上寄生,可能导致R.brachysoma的种群减少。双遗传吸虫感染在海洋鱼类中普遍存在，对鱼类的整体健康有相当大的影响。这里,为了识别感染R.brachysoma的双遗传吸虫，我们的目标是确定身份，患病率,来自泰国湾的R.brachysoma中的双基因感染强度。从ChonBuri省获得了总共194条短鲭鱼，在那里分离并鉴定出了异族。使用核28SrRNA基因确认了双基因的分子身份。在194条短鲭鱼中，100%被发现感染了异族,由卵磷脂组成，前气孔,Opechona,和阿菲努鲁.卵磷脂是最普遍的（98％），感染强度最高（平均强度37），其次是前造口症（患病率为75％，平均强度为17）。因此，我们的研究提供了第一个证据，证明了成族人感染了泰国湾经济上重要的短鲭鱼。双遗传吸虫的高感染率可能对尖锐器的健康有影响。进一步推动其人口减少。这些数据强调了保护泰国湾渔业资源的重要性，和下游保护工作对于基于证据的管理决策至关重要，以保障鱼类资源的长期可持续性。
