The marine gastropod Conomurex luhuanus (Strombidae) has high-resolution spatial vision and eyes with complex retinas
The marine gastropod Conomurex luhuanus (Strombidae) has high-resolution spatial vision and eyes with complex retinas
复制标题
海洋腹足动物 Conomurex luhuanus（Strombidae）具有高分辨率的空间视觉和具有复杂视网膜的眼睛
DOI：
10.1101/2021.12.21.473630
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Irwin A
中科院分区：
文献类型：
--
作者：
Irwin A
海螺科的所有种类都拥有照相机式的大眼睛，与大多数其他腹足类动物相比，它们的眼睛发育得惊人地好。虽然我们知道这些眼睛结构复杂，但对它们视觉功能的研究却很少。在这里，我们使用等光扩展视觉刺激来测量空间分辨率和对比度灵敏度的一个strobid，Conomurex luhuanus。通过这些刺激，我们发现这个物种对视野中小到1.06度的物体都有反应。我们也证明了c。luhuanus对0.07的迈克尔逊对比度有反应，这是物体和背景之间的低对比度灵敏度。如此小的角尺寸和低对比度的视觉刺激引起的防御性退缩反应表明，海螺可能利用空间视觉来早期发现潜在的捕食者。我们用1.04度空间分辨率的形态学估计来支持这些发现。因此，这些解剖学数据与行为测量一致，并强调了在动物视觉研究中整合行为和形态学方法的好处。使用现代成像技术[连续块面扫描电子显微镜（SBF-SEM），结合透射电子显微镜（TEM）]，我们发现c。就细胞类型多样性而言，黄貂鱼的视网膜比先前仅使用TEM对该组进行的研究所预期的更复杂。我们找到了c。Luhuanusretina由六种细胞类型组成，包括一种新发现的神经节细胞和副感光细胞，而不是之前描述的四种细胞类型。
All species within the conch snail family Strombidae possess large camera-type eyes that are surprisingly well-developed compared with those found in most other gastropods. Although these eyes are known to be structurally complex, very little research on their visual function has been conducted. Here, we use isoluminant expanding visual stimuli to measure the spatial resolution and contrast sensitivity of a strombid,Conomurex luhuanus. Using these stimuli, we show that this species responds to objects as small as 1.06 deg in its visual field. We also show thatC. luhuanusresponds to Michelson contrasts of 0.07, a low contrast sensitivity between object and background. The defensive withdrawal response elicited by visual stimuli of such small angular size and low contrast suggests that conch snails may use spatial vision for the early detection of potential predators. We support these findings with morphological estimations of spatial resolution of 1.04 deg. These anatomical data therefore agree with the behavioural measures and highlight the benefits of integrating behavioural and morphological approaches in animal vision studies. Using contemporary imaging techniques [serial block-face scanning electron microscopy (SBF-SEM), in conjunction with transmission electron microscopy (TEM)], we found thatC. luhuanushave more complex retinas, in terms of cell type diversity, than expected based on previous studies of the group using TEM alone. We find theC. luhuanusretina comprises six cell types, including a newly identified ganglion cell and accessory photoreceptor, rather than the previously described four cell types.
登录
查看更多内容
影响因子：
1.9
作者：
Nilsson, Dan-E
通讯作者：
Nilsson, Dan-E
腹足动物 Bulla 眼中光感受器和昼夜节律起搏神经元的超微结构
DOI：
--
发表时间：
1983
期刊：
Journal of Neurocytology
影响因子：
--
作者：
J. Jacklet;W. Colquhoun
通讯作者：
W. Colquhoun
影响因子：
4
作者：
Chung WS;Marshall NJ
通讯作者：
Marshall NJ
视觉和行为的地形
影响因子：
2.8
作者：
Jochen Smolka;J. Hemmi
通讯作者：
J. Hemmi
DOI：
10.1098/rspb.2021.1730
发表时间：
2021-11-10
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Chappell DR;Horan TM;Speiser DI
通讯作者：
Speiser DI