Shining a light on parasite behaviour: daily patterns of Argulus fish lice.
Shining a light on parasite behaviour: daily patterns of Argulus fish lice.
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对寄生虫行为的启示：阿古斯鱼虱的每日模式。
DOI：
10.1017/s0031182021000445
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发表时间：
2021-06
期刊：
影响因子：
2.4
通讯作者：
Ellison, Amy
中科院分区：
文献类型：
--
作者：
Hunt, Rhi;Cable, Jo;Ellison, Amy
寄生虫表现出各种各样的行为，这些行为经常被忽视，而有利于宿主的反应。了解这些行为可以通过更精确地应用或开发基于行为的新策略来改善寄生虫控制。在水产养殖中，鱼虱是一个持续存在的问题，感染会减少渔业产量，而且控制方案有限。鱼虱在它们的生存能力和离开宿主的能力方面是不同的，允许在它们的生命周期中传播给多个鱼类宿主。在这里，我们评估了离开主机的Argulus foliaceus（淡水鱼虱）的行为，并观察到一个昼夜节律的模式，他们的行为。当虱子暴露在持续的黑暗中时，这种模式就消失了，这表明这种行为不是内源性的。雄性在光照下始终活跃，在黑暗中活动减少。与此相反，女性活跃在光明和黑暗阶段的高峰活动在黑暗时期的开始。A.叶状囊藻也强烈地被光刺激所吸引，与绿色或红色光相比，叶状囊藻更喜欢白色和蓝色光。光是鱼虱活动的强大驱动力，可用于捕获寄生虫。还可以改变水生生物光制度，以减少寄生虫的吸引力和活动。
Parasites display a wide range of behaviours that are frequently overlooked in favour of host responses. Understanding these behaviours can improve parasite control through a more precise application or development of new behaviour-based strategies. In aquaculture fish lice are an ongoing problem, infections reduce fishery production and control options are limited. Fish lice are distinct in their ability to survive and swim off hosts, allowing the transmission to multiple fish hosts across their lifespan. Here we assessed the off-host behaviour of Argulus foliaceus (a freshwater fish louse) and observed a diurnal rhythmical pattern in their behaviour. This pattern was lost when lice were exposed to constant darkness, indicating that the behaviour is not endogenously driven. Males were consistently active in light with reduced activity in darkness. In contrast, females were active during light and dark phases with peak activity at the start of dark periods. A. foliaceus was also strongly attracted to a light stimulus, preferring white- and blue-coloured lights over green- or red-coloured lights. Light is a strong driver of fish louse activity and could be used to trap parasites. Aquaculture light regimes could also be altered to reduce parasite attraction and activity.