Topography of vision and behaviour
Topography of vision and behaviour
复制标题
视觉和行为的地形
DOI：
10.1242/jeb.032359
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发表时间：
2009
影响因子：
2.8
通讯作者：
J. Hemmi
中科院分区：
文献类型：
--
作者：
Jochen Smolka;J. Hemmi
摘要考虑到视觉系统、任务和栖息地的广泛范围，令人惊讶的是，几乎没有实验证据表明视觉限制如何影响自然条件下的行为策略。分析这种关系将需要一个实验系统，允许同步测量视觉线索和视觉引导行为。从动物的角度对视觉线索进行量化的第一步是了解其视觉系统的过滤特性。我们研究了中华绒螯蟹复眼的视觉处理的第一阶段--通过小眼阵列进行采样。使用体内伪视图法，我们确定了小眼的大小和观察方向，并创建了整个视野的光学和采样分辨率的完整眼图。我们的结果显示了五个不同的眼睛区域(腹侧、背侧、额部、外侧和内侧)，它们在局部采样阵列的组织上表现出明显的差异，特别是在分辨率和对比敏感度的平衡方面。我们认为，在全球视觉空间受限的情况下，这些区域优化反映了视野中相应部分的信息含量和行为相关性。在展示视觉采样、视觉线索和行为策略之间的紧密联系时，我们的分析强调了对自然行为和自然刺激的研究对于我们理解和解释动物行为的进化和生态以及感觉系统的设计是多么重要。
SUMMARY Given the great range of visual systems, tasks and habitats, there is surprisingly little experimental evidence of how visual limitations affect behavioural strategies under natural conditions. Analysing this relationship will require an experimental system that allows for the synchronous measurement of visual cues and visually guided behaviour. The first step in quantifying visual cues from an animal's perspective is to understand the filter properties of its visual system. We examined the first stage of visual processing – sampling by the ommatidial array – in the compound eye of the fiddler crab Uca vomeris. Using an in vivo pseudopupil method we determined sizes and viewing directions of ommatidia and created a complete eye map of optical and sampling resolution across the visual field. Our results reveal five distinct eye regions (ventral, dorsal, frontal, lateral and medial) which exhibit clear differences in the organisation of the local sampling array, in particular with respect to the balance of resolution and contrast sensitivity. We argue that, under global eye space constraints, these regional optimisations reflect the information content and behavioural relevance of the corresponding parts of the visual field. In demonstrating the tight link between visual sampling, visual cues and behavioural strategies, our analysis highlights how the study of natural behaviour and natural stimuli is essential to our understanding and interpretation of the evolution and ecology of animal behaviour and the design of sensory systems.