Motion and color information processing in the Papilio visual system

Papilio 视觉系统中的运动和颜色信息处理

• 批准号: 17F17720
• 负责人: 蟻川 謙太郎
• 金额: $ 1.47万
• 依托单位: The Graduate University for Advanced Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2017
• 资助国家: 日本
• 起止时间: 2017-07-26 至 2019-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17F17720/
• 关键词: photoreceptor; ommatidium; spectral sensitivity; polarization sensitivity; compound eye; butterfly; single cell recording; tracking; phototaxis; orientation; tethered flight

In the previous year, we collected an extensive dataset on the spectral and polarisation properties of the photoreceptors of Parantica sita. This year we classified these receptors into five distinct spectral groups including ultraviolet (UV), blue (B), broad green (bG), narrow green (nG) and double peaking green (dG) photoreceptors. Within each ommatidium there are 8 main photoreceptor positions from R1 to R8. Due to the dye-injection experiments, we were able demonstrate that UV and B photoreceptors only occur at the R1 and R2 positions while other receptors occur in the R3-R8 positions. We also performed a close examination of ommatidial structure using electron microscopy and revealed that ommatidia at the dorsal rim of the eye were more rectangular than ommatidia in other regions of the eye. The microvilli orientation in the ommatidia of the dorsal rim area of the eye seem specialised for enhanced polarisation sensitivity although no electrical recordings have been made in this region of the eye.On the behavioural side, butterflies have proven reluctant to fly while being tethered. We have discovered that the use of optic flow may be useful to increase flight motivation of the butterfly while it is tethered. In contrast to tethered flight, butterflies display enough flight motivation for prolonged experimental runs during free-flight in a netted cage.

在上一年，我们收集了有关Parantica Sita感光体光谱和极化特性的广泛数据集。今年，我们将这些受体分为五个不同的光谱群，包括紫外线（UV），蓝色（B），宽绿色（BG），狭窄的绿色（NG）和双峰绿色（DG）光感受器。在每个Ommatidium中，有8个主要的光感受器位置从R1到R8。由于染料注射实验，我们能够证明紫外线和B光感受器仅出现在R1和R2位置，而其他受体则出现在R3-R8位置。我们还使用电子显微镜对眼膜结构进行了仔细检查，并揭示了眼睛背侧的胶质膜比眼睛的其他区域更矩形。眼睛背侧边缘区域的微绒毛方向似乎专门用于增强极化敏感性，尽管在眼睛的这一区域中没有进行电记录。在行为方面，蝴蝶在被束缚的同时被证明不愿飞行。我们发现，光流的使用可能在束缚时增加蝴蝶的飞行动机可能是有用的。与束缚的飞行相反，蝴蝶在网笼中自由飞行时表现出足够的飞行动机，以进行长时间的实验跑步。

项目成果

Phototactic flight of the Chestnut Tiger butterfly Parantica sita based on the dorsal eye region

基于背眼区域的栗虎蝶Parantica sata的趋光飞行

• 发表时间: 2018
• 作者: Kinoshita M;Nagloo N;Stewart Finlay
• 通讯作者: Stewart Finlay

Spectral and polarisation properties in the eye of a migratory butterfly, Parantica sita

迁徙蝴蝶 Parantica sata 眼睛的光谱和偏振特性

• 发表时间: 2018
• 作者: Nagloo N;Arikawa K;Kinoshita M
• 通讯作者: Kinoshita M

University of Wuerzburg(ドイツ)

维尔茨堡大学（德国）

Symposium 1 of the 39th Annual meeting of Japanese Society for Comparative Physiology and Biochemistry

第39届日本比较生理生化学会年会第1次研讨会

• 发表时间: 2018
• 期刊: 比較生理生化学
• 作者: Nagloo N