State-dependency of host-seeking in Rhodnius prolixus: The post-ecdysis time
State-dependency of host-seeking in Rhodnius prolixus: The post-ecdysis time
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DOI：
10.1016/j.jinsphys.2009.02.004
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发表时间：
2009-06-01
影响因子：
2.2
通讯作者：
Lazzari, Claudio R.
中科院分区：
文献类型：
--
作者：
Bodin, Aurelie;Vinauger, Clement;Lazzari, Claudio R.
大多数吸血昆虫的血液来源同时扮演着宿主和潜在捕食者的双重角色。喂食行为应仅在必要时触发，并应尽快完成。从流行病学的角度来看，这种调节对病媒的进食频率产生影响，从而影响寄生虫的传播。目前，关于生理状态对取食动机的影响的数据并不多，而且大多限于少数几种蚊子。我们分析了主机寻求行为的Rhodnius prolixus作为一个函数的蜕皮以来所经过的时间，通过测试幼虫的血液来源的反应，和长（CO2）和短距离（热）的方向线索与他们的脊椎动物主机。我们的实验表明，在蜕皮后的第一天，昆虫对任何刺激都没有反应。遵循化学和物理线索的能力随着蜕皮后时间逐渐（热）或逐步（CO2）增加。少数昆虫在第2天开始进食，但仅在蜕皮后的第7天，其中50%的昆虫进食血餐，以在第10天达到进食的最高动机。本文还讨论了红腹锦鸡儿摄食行为出现“成熟期”的原因。讨论了prolixus。(C)2009爱思唯尔有限公司版权所有。
The source of blood of most haematophagous insects plays at the same time the double role of host and potential predator. Feeding behaviour should be triggered only when necessary and should be completed as quickly as possible. From an epidemiological point of view, this modulation has an impact on the feeding frequency of disease vectors and, as a consequence, on the transmission of parasites. At present, not many data are available on the influence of the physiological state on the motivation to feed, and mostly limited to a few mosquito species. We analyzed the host-seeking behaviour of Rhodnius prolixus as a function of the time elapsed since the ecdysis, by testing the response of larvae to a blood source, and long-(CO2) and short-range (heat) orientation cues associated to their vertebrate hosts. Our experiments demonstrated that during the first days following the ecdysis insects do not respond to any stimuli. The ability to follow chemical and physical cues increases either gradually (heat) or step-wise CO2) with post-ecdysis time. A few insects started to feed on day 2, but only at day 7 following the ecdysis 50% of them took a blood meal, to reach the highest motivation to feed on day 10. The reasons for the "maturation period" in feeding behaviour of R. prolixus are discussed. (C) 2009 Elsevier Ltd. All rights reserved.