Parasite communities of trout: initial colonization and subsequent dispersal among host cohorts

鳟鱼的寄生虫群落：最初的定植和随后在宿主群体中的扩散

• 批准号: 3697-2011
• 负责人: Cone, David
• 金额: $ 1.89万
• 依托单位: Saint Mary's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=544136
• 关键词: Parasite; communities; trout; initial; colonization

It is well known that fish are parasitized by all sorts of different types of parasites, and that they form enormously rich parasite communities, at both the level of individual fish (local parasite community) and the level of habitat (parasite species pool). These communities are known to vary in membership and structure with host life history and environmental factors (latitude, longitude, hydrological regimes, habitat succession, and ecosystem health). What is missing from all of this research is a critical study of parasites of very young fish and as a result we have little information on sequences of early colonization by fish parasite communities. We propose studying the development of parasite communities of brook trout in two experimental study lakes in the Cape Breton Highlands, focusing on the sequence of initial colonization/development of the parasite communities. What is also missing from the mentioned research is the study of subsequent dispersal of fish parasite communities among host cohorts in terms of real biomass. Thus, in the fall of each year, we will undertake mark-recapture to estimate the numbers of trout in each cohort. This information will be integrated with basic prevalence (%), intensity (mean number of parasites/infected fish) and parasite weight to create data that will allow an estimate of the biomass of the entire parasite community in relation to that of the host trout. All of this will be interpreted in relation to the known life history of the parasites and should provide food for thought in broader issues of how biological communities form and how parasite biomass fits into local food webs.

众所周知，鱼类被各种不同类型的寄生虫寄生，它们形成了非常丰富的寄生虫群落，无论是在个体鱼的水平（当地寄生虫群落）还是在栖息地的水平（寄生虫物种库）。这些社区是众所周知的，不同的成员和结构与主机的生活史和环境因素（纬度，经度，水文制度，栖息地演替，生态系统健康）。从所有这些研究中缺少的是对幼鱼寄生虫的关键研究，因此我们对鱼类寄生虫群落早期定殖序列的信息很少。我们建议在布雷东角高地的两个实验研究湖泊中研究溪鳟寄生虫群落的发展，重点是寄生虫群落的初始定殖/发展序列。上述研究中还缺少的是对鱼类寄生虫群落在宿主群体中以真实的生物量进行后续扩散的研究。因此，在每年的秋天，我们将进行标记重捕，以估计每个队列中鳟鱼的数量。这些信息将与基本流行率（%）、强度（寄生虫/受感染鱼类的平均数量）和寄生虫重量相结合，以创建数据，从而可以估计整个寄生虫群落相对于宿主鳟鱼的生物量。所有这一切都将被解释为与已知的生活史的寄生虫，并应提供更广泛的问题，生物群落如何形成和寄生虫生物量如何适应当地的食物网思考的食物。