适应性宿主对感染的反应可能类似于寄生虫操纵
Camilla Håkonsrud Jensen1, Jacqueline Weidner1, Jarl Giske1
1Department of Biological Sciences University of Bergen Bergen Norway.
Ecology and evolution
|July 17, 2023
概括
受感染的鱼类最好地增加激素,食和生长,以弥补寄生虫的成本. 这些适应性反应模仿操纵,但是补偿性的,有利于宿主和寄生虫.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 动物生理学 动物生理学
背景情况:
- 寄生虫感染可以改变宿主行为和生理学.
- 区分适应性宿主反应与寄生虫操纵是具有挑战性的.
- 激素调节在能量分配和生长中起着关键作用.
研究的目的:
- 研究被寄生虫感染的幼鱼的最佳激素调节,能量分配和食行为.
- 为了确定观察到的宿主变化是适应性补偿反应还是寄生虫诱导的操纵.
主要方法:
- 开发一个动态优化模型,用于在随机食物环境中的幼鱼.
- 模拟宿主-寄生虫相互作用与宿主的能量成本.
- 激素调节 (甲状腺激素,成长激素,甲状腺激素) 和能量分配策略的分析.
主要成果:
- 受感染的宿主最佳地增加了素,生长和甲状腺激素.
- 这导致活动增加,食,生长和冒险 (更高的掠食率).
- 这些变化虽然是适应性的,但类似于寄生虫操纵的经典迹象 (例如巨型).
结论:
- 观察到的宿主变化 (巨型,危险行为) 可能是适应性的补偿反应,不一定是操纵.
- 增加宿主生长和健康可以无意中使寄生虫受益.
- 在没有进一步调查的情况下,当解释宿主行为作为寄生虫操纵的证据时,需要谨慎.
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