Oriented responses of the triatomine bugs Rhodnius prolixus and Triatoma infestans to vertebrate odours on a servosphere
Oriented responses of the triatomine bugs Rhodnius prolixus and Triatoma infestans to vertebrate odours on a servosphere
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锥蝽蝽（Rhodnius prolixus）和致病锥蝽（Triatoma infestans）对伺服球上脊椎动物气味的定向反应
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
P. Guerin
中科院分区：
文献类型：
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作者：
J. Taneja;P. Guerin
在服务圈中记录了普氏管圆线虫和致病圆线虫成虫对其成分之一--老鼠气味(CO2)和兔尿气味的定向反应。挥发物是在排除其他感官形式的受控条件下以气流形式输送的。在无刺激的空气中，三聚氰胺优先顺风而行，中间被相对较低速度的停顿或周期打断，所有这些都是可变的持续时间。在充满气味的空气中，臭虫保持着它们典型的行走习惯，但从消极的运动转向积极的运动。对气味开始的特征反应是停下来，用触角采样空气，在原地逆风，然后朝着来源的方向走至少几秒钟，即气味介导的风动。老鼠的气味使感染毛滴虫的速度提高到5.3厘米-1。在气味传递停止后，这两个物种都继续了一段时间的逆风反应，但在这段时间里，轨道的侧风分量更加突出--我们推测，这是虫子重新接触气味羽流所做的努力。这项调查为仅凭嗅觉线索在三聚氰胺中发现宿主提供了明确的证据。
Oriented responses of both R. prolixus and T. infestans adults were recorded on a servosphere to mouse-odour, one of its components (CO2), and to rabbit urine-odour. The volatiles were delivered in an air-stream under controlled conditions which excluded other sensory modalities. In stimulus-free air the triatomines walked preferentially downwind in straight bouts interrupted by stops or periods at relatively low speeds, all of variable duration. In odour-laden air, bugs maintained their typical walking habit but switched from negative to positive anemotaxis. The characteristic response to odour onset was to stop, sample the air with the antennae, turn upwind in situ, and then walk off in the direction of the source for at least a few seconds, i.e., odour mediated anemotaxis. Mouse-odour caused T. infestans to increase its speed to 5.3 cms-1. Both species continued with the upwind response for some time after odour delivery ceased, but the crosswind component of the tracks was more prominent during this period — an effort, we presume, by the bugs to re-contact an odour plume. This investigation provides unequivocal evidence for host finding in triatomines by olfactory cues alone.