Chang, Cheng-Ya

Chang, Cheng-Ya


Master student (Department of Life Sciences, National Chung-Hsing University, Taiwan)


Comparing long wavelength color discrimination abilities of spiders


Most jumping spiders have four types of photoreceptors in their principal eyes, therefore their color vision is better than that of the other spider taxa. Previous studies predicted that jumping spiders had a much broader spectral sensitivity range. Because jumping spiders have red light photoreceptors, they may have better long wavelength color perception ability. In this study, I will use heat-avoidance experiments, to investigate whether jumping spiders exhibiting bright body colors, have good color discrimination ability in long wavelength. Moreover, I will also investigate whether jumping spiders with dim body colors also have this capability. I will use four jumping spider species such as the brightly-colored Telamonia festiva and Ptocasius strupifer, and dim-colored Myrmarachne magnus. The color discrimination abilities of spiders without red light photoreceptors such as Oxyopes macilentus (Oxyopidae) and Thomisus labefactus (Thomisidae) will also be used as comparsions. I predict that both bright and dim jumping spiders should have long wavelength color discrimination ability, while the other spider taxa should have no such ability.


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Updated: Mar-10-2014 01:22:51 (Taiwan, GMT+08:00).