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主体能力和学校行为对宿主-病原体系统中的寄生虫传播的潜在影响:稀释效应的测试
Shun Zhou1, Xiao Jin2, Ming Duan3
1Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture (CAS), Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China.
International journal for parasitology
|August 15, 2024
概括
高的物种多样性可以减少疾病的传播,但宿主能力很重要. 一种竞争力较低的鱼种,普鲁士鱼,通过减少遭遇和改变学龄行为,有助于稀释金鱼中的寄生虫传播.
科学领域:
- 生态生态学 生态生态学
- 寄生虫学的寄生虫学
- 水生生物学 水生生物学
背景情况:
- 生态社区的高物种多样性可能会降低传染病风险,这种现象被称为稀释效应.
- 稀释效应的普遍性是有争议的,宿主能力和宿主行为可能会影响疾病动态 (稀释或放大).
- 了解这些因素对于预测各种水生系统中疾病传播至关重要.
研究的目的:
- 调查宿主能力和学校行为对金鱼 (Carassius auratus) - Gyrodactylus kobayashii系统中的寄生虫传播的影响.
- 为了确定不同鱼类的存在是否会影响金鱼上的寄生虫数量,同时保持恒定的焦点宿主密度.
- 在这个宿主-寄生虫模型中阐明稀释效应运行的条件.
主要方法:
- 评估了12种鱼类对单源外寄生虫G. kobayashii的宿主能力.
- 暴露于G. kobayashii的金鱼在单种养殖 (控制) 和混合物种群中与普鲁士鱼 (能力低),草鱼 (无能力),剑尾鱼 (无能力) 或它们的组合.
- 在金鱼和其他宿主身上量化了寄生虫的数量,并使用视频录制来分析鱼类的行为 (混合,距离,速度,接触时间).
主要成果:
- 与G. kobayashii感染的金鱼在与普鲁士鱼混合时,与对照组相比,其寄生虫数量显著减少.
- 当金鱼与草鱼,剑尾鱼或物种组合混合时,没有观察到显著的稀释效应.
- 寄生虫传播到普鲁士鱼发生,行为观察表明金鱼与普鲁士鱼混合得很好,但避免了草鱼和剑尾鱼,距离增加和接触时间减少.
结论:
- 对于稀释效应来说,必须存在足够多的低能力宿主,这种稀释效应是由减少接触和改变学龄行为所介导的.
- 由于寄生虫的特殊性和缺乏宿主混合,不合格的宿主没有诱导稀释效应.
- 宿主能力和行为相互作用是宿主-寄生虫系统中稀释效应的关键决定因素.
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