当前位置: X-MOL 学术Physiol. Entomol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Body temperature of the parasitic wasp Pimpla turionellae (Hymenoptera) during host location by vibrational sounding
Physiological Entomology ( IF 1.5 ) Pub Date : 2008-03-01 , DOI: 10.1111/j.1365-3032.2007.00595.x
Stefan Kroder 1 , Jörg Samietz , Anton Stabentheiner , Silvia Dorn
Affiliation  

Abstract The pupal parasitoid Pimpla turionellae (L.) uses self‐produced vibrations transmitted on the plant substrate, so‐called vibrational sounding, to locate immobile concealed pupal hosts. The wasps are able to use vibrational sounding reliably over a broad range of ambient temperatures and even show an increased signal frequency and intensity at low temperatures. The present study investigates how control of body temperature in the wasps by endothermic mechanisms may facilitate host location under changing thermal environments. Insect body temperature is measured with real‐time IR thermography on plant‐stem models at temperature treatments of 10, 18, 26 and 30 °C, whereas behaviour is recorded with respect to vibrational host location. The results reveal a low‐level endothermy that likely interferes with vibrational sound production because it occurs only in nonsearching females. At the lowest temperature of 10 °C, the thoracic temperature is 1.15 °C warmer than the ambient surface temperature whereas, at the high temperatures of 26 and 30 ° C, the wasps cool down their thorax by 0.29 and 0.47 °C, respectively, and their head by 0.45 and 0.61 °C below ambient surface temperature. By contrast, regardless of ambient temperature, searching females always have a slightly elevated body temperature of at most 0.30 °C above the ambient surface temperature. Behavioural observations indicate that searching females interrupt host location more frequently at suboptimal temperatures, presumably due to the requirements of thermoregulation. It is assumed that both mechanisms, producing vibrations for host location and low‐level endothermy, are located in the thorax. Endothermy by thoracic muscle work probably disturbs signal structure of vibrational sounding, so the processes cannot be used at the same time.

中文翻译:

寄生蜂 Pimpla turionellae(膜翅目)在宿主定位期间的体温通过振动探测

摘要 蛹寄生蜂 Pimpla turionellae (L.) 利用自发振动传递到植物基质上,即所谓的振动探测,来定位不动的隐藏蛹寄主。黄蜂能够在广泛的环境温度范围内可靠地使用振动声音,甚至在低温下显示出增加的信号频率和强度。本研究调查了如何通过吸热机制控制黄蜂的体温,从而在不断变化的热环境下促进宿主定位。在 10、18、26 和 30 °C 的温度处理下,在植物茎模型上使用实时红外热成像仪测量昆虫体温,而记录振动宿主位置的行为。结果表明,低水平的吸热可能会干扰振动声音的产生,因为它只发生在不进行搜索的雌性身上。在 10 °C 的最低温度下,胸部温度比环境表面温度高 1.15 °C,而在 26 °C 和 30 °C 的高温下,黄蜂的胸部温度分别降低了 0.29 和 0.47 °C,它们的水头比环境表面温度低 0.45 和 0.61 °C。相比之下,无论环境温度如何,搜索雌性的体温总是比环境表面温度高 0.30°C。行为观察表明,在次优温度下,搜索雌性会更频繁地中断宿主位置,这可能是由于体温调节的要求。假设这两种机制,产生宿主位置和低水平吸热的振动位于胸部。胸肌工作的吸热可能会干扰振动声音的信号结构,因此不能同时使用这些过程。
更新日期:2008-03-01
down
wechat
bug