The impact of climate change on infection of salmonid fish with Saprolegnia

气候变化对鲑鱼水霉感染的影响

基本信息

批准号：
BB/M026566/1
负责人：
Pieter Van West
金额：
$ 31.22万
依托单位：
University of Aberdeen
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2015
资助国家：
英国
起止时间：
2015 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=BB%2FM026566%2F1
关键词：
impact climate change infection salmonid

项目摘要

Fish are very sensitive to changes in their environment and it is known that such changes can lead to increased stress and can alter the immune status of the fish, which in turn can lead to higher susceptibility to diseases. We will investigate the role of water temperature and oxygen changes on the incidence and severity of salmon and trout infection with Saprolegnia parasitica and Saprolegnia diclina. Both pathogens cause saprolegniosis, which is a deadly disease of salmonid eggs and fish. Saprolegniosis can often lead to losses of 10% or more in fish farms. Currently these oomycete pathogens rank amongst the top 3 of most relevant pathogens on rainbow trout and Atlantic salmon in the aquaculture industry of the UK. Data on temperature and oxygen dependant pathogen dynamics and host immune response will be collected through experimental and field studies, which will provide a basis for predicting the likely impact of these pathogens as a result of climate change. Spatial analysis and mapping techniques will be used to identify baseline relationships between fish farm locations, environmental conditions in the river and pathogen abundance. Based on climate change predictions for the UK, we will try to predict how the impact of the pathogens in our study is likely to change over the next decades. The information generated from this project, which addresses all priority areas of the BBSRC/NERC joint call on Aquaculture: Fish Health & Disease, will ultimately allow better planning and design of mitigating strategies for farmers, which will be especially relevant after the enforcement of the EU-wide ban on the use of formalin in aquaculture. Changes in aquaculture management procedures, biosecurity and treatment (of intake water or fish) may allow fish farmers to counteract some of the expected impacts of these fish pathogens in response to climate change. The project will also allow making projections about the impact of CC and Saprolegnia infection on wild salmonid fish. This information will be important to inform future conservation strategies.

鱼对环境的变化非常敏感，众所周知，这种变化会导致压力增加，并可以改变鱼类的免疫状态，这反过来又会导致对疾病的敏感性更高。我们将研究水温和氧气变化对鲑鱼和鳟鱼的发病率和严重程度的作用，并用辣椒虫和肉毒杆菌diclina感染。两种病原体都会引起腐生性，这是鲑鱼卵和鱼类的致命疾病。腐败通常会导致养鱼场损失10％或更多。目前，这些卵菌病原体在英国水产养殖业中彩虹鳟鱼和大西洋鲑鱼上最相关的病原体中排名前三。将通过实验和现场研究收集有关温度和氧气依赖性病原体动力学和宿主免疫反应的数据，这将为预测由于气候变化而预测这些病原体的可能影响的基础。空间分析和映射技术将用于确定养鱼场所之间的基线关系，河流中的环境条件和病原体丰度。根据英国的气候变化预测，我们将尝试预测未来几十年中病原体在我们研究中的影响如何变化。该项目产生的信息解决了BBSRC/NERC联合呼吁的水产养殖与疾病的所有优先级领域，最终将允许更好地计划和设计缓解农民的策略，这将在执行欧盟范围内对福尔马林在水产养殖中使用欧盟范围的禁令后尤其重要。水产养殖管理程序，生物安全性和治疗（进水或鱼类）的变化可能使养殖者可以抵消这些鱼类病原体对气候变化的一些预期影响。该项目还将允许对CC和Saprolegnia感染对野生鲑鱼鱼的影响进行预测。此信息对于告知未来的保护策略将很重要。