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Assessing the Level of Risk of Introduction and Spread of Exotic Oomycete Species via Ornamental Fish Imports to Wild Fish Populations and Fish Popula

评估通过进口观赏鱼向野生鱼类种群和鱼类种群引入和传播外来卵菌物种的风险水平

基本信息

批准号：
2789625
负责人：
金额：
--
依托单位：
University of Aberdeen
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2789625
关键词：
Assessing Level Risk Introduction Spread

项目摘要

Millions of ornamental fish are being imported every year into the UK, potentially carrying a huge range of pathogens. It is known to the Cefas FHI that some of the imports from south east Asia are imported carrying viral pathogens. Less is known about the Oomycete pathogens that are being imported. Two species of oomycetes have independently emerged as highly successful pathogens of finfish in aquaculture. Saprolegnia parasitica is responsible for high levels of mortality in salmon in the UK and elsewhere. Aphanomyces invadans is responsible for the OIE notifiable disease epizootic ulcerative syndrome (EUS), which is spreading geographically and is already well established in Asia and Africa. The ranges of fish species susceptible to the two pathogens are large and overlapping but not identical. Both pathogens not only affect farmed fish but also natural populations.The purpose of this PhD project is to assess the level of risk from such imports by testing samples from recent imports. Samples from wild fish populations and fisheries will be tested to assess the presence of these pathogens in the natural environment. Phylogenetic analyses will be applied to relate imported strains to those found in the wild. This will allow to assess the potential threat from imported Oomycete pathogens for fish populations in fisheries and the wild.

每年有数百万观赏鱼被进口到英国，可能携带大量病原体。Cefas FHI知道，从东南亚进口的一些产品携带病毒病原体。对正在输入的卵菌病原体知之甚少。两种卵菌已独立地成为水产养殖中鳍鱼的高度成功的病原体。寄生水霉是英国和其他地方鲑鱼高死亡率的原因。入侵隐丝酵母是引起世界动物卫生组织应报告的疾病-动物流行性溃疡综合征（EUS）的原因，该疾病正在地理上蔓延，并已在亚洲和非洲得到很好的证实。对这两种病原体敏感的鱼类种类范围很大，相互重叠，但不完全相同。这两种病原体不仅影响养殖鱼类，也影响自然种群。本博士项目的目的是通过测试最近进口的样本来评估此类进口的风险水平。将对来自野生鱼类种群和渔业的样本进行检测，以评估这些病原体在自然环境中的存在。系统发生分析将用于将进口菌株与野生菌株联系起来。这将有助于评估进口卵菌病原体对渔业和野生鱼类种群的潜在威胁。