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.

在过去的一年中，我们收集了广泛的数据集上的光谱和偏振特性的光感受器的Parantica sita。今年我们将这些受体分为五个不同的光谱组，包括紫外（UV）、蓝光（B）、宽绿色（bG）、窄绿色（nG）和双峰绿色（dG）光受体。在每个小眼内，从R1到R8有8个主要的光感受器位置。由于染料注入实验，我们能够证明UV和B光受体仅发生在R1和R2位置，而其他受体发生在R3-R8位置。我们还进行了仔细检查小眼结构，电子显微镜，发现小眼在眼睛的背缘比小眼在眼睛的其他地区更矩形。微绒毛方向的小眼的背缘区域的眼睛似乎专门为增强偏振敏感性，虽然没有电子记录已在这个区域的eye.On行为方面，蝴蝶已被证明不愿意飞，而被拴。我们已经发现，使用光流可能有助于增加蝴蝶的飞行动机，而它是拴系。与系留飞行相反，蝴蝶在网笼中自由飞行期间显示出足够的飞行动机用于长时间的实验运行。

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