期刊
BIOLOGY LETTERS
卷 8, 期 6, 页码 949-951出版社
ROYAL SOC
DOI: 10.1098/rsbl.2012.0716
关键词
salticid; spider; vision; looming; stimulus
资金
- NSF [IOS 0952822]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [0952822] Funding Source: National Science Foundation
Some species have sensory systems divided into subsystems with morphologically different sense organs that acquire different types of information within the same modality. Jumping spiders (family Salticidae) have eight eyes. Four eyes are directed anteriorly to view objects in front of the spider: a pair of principal eyes track targets with their movable retinae, while the immobile anterior lateral (AL) eyes have a larger field of view and lower resolution. To test whether the principal eyes, the AL eyes, or both together mediate the response to looming stimuli, we presented spiders with a video of a solid black circle that rapidly expanded (loomed) or contracted (receded). Control spiders and spiders with their principal eyes masked were significantly more likely to back away from the looming stimulus than were spiders with their AL eyes masked. Almost no individuals backed away from the receding stimulus. Our results show that the AL eyes alone mediate the loom response to objects anterior to the spider.
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