First evidence of fine colour discrimination ability in ants (Hymenoptera, Formicidae)
First evidence of fine colour discrimination ability in ants (Hymenoptera, Formicidae)
复制标题
DOI：
10.1242/jeb.037853
复制
发表时间：
2010-01-01
影响因子：
2.8
通讯作者：
Aksoy, V.
中科院分区：
文献类型：
--
作者：
Camlitepe, Y.;Aksoy, V.
在目前的研究中，我们报告了蚂蚁辨别和学习感知上接近的颜色刺激的第一个证据。在Y迷宫选择装置中，蚂蚁物种Cataglyphis aenescens和Formica cunceraria的觅食者被训练成与食物奖励相关的恒定强度的单色光刺激。两个平均波长为40 nm感知距离的刺激物分别来自紫外线(340 nm对380 nm)和绿色(510 nm对550 nm)范围，因为这些物种是紫外绿二色物。对觅食者进行两种条件反射训练[绝对条件反射(AC)和差异条件反射(DC)]。在紫外线范围内，在两种训练过程中，当被呈现微小的颜色差异时，毛冠花食草动物都无法辨别。当用AC训练时，觅食者在绿色范围内也不及格，但当用DC训练时，它们对奖励刺激表现出明显的偏见。当只用DC训练时，黑线蚁在紫外线范围内完成了这项任务。在绿色范围内，在两种训练条件下，草鱼都表现出明显的对奖赏刺激的偏好。在DC中，即使奖励刺激的强度降低了一个对数单位，觅食者在选择奖励刺激时也从未失败过。这清楚地表明DC对于辨别知觉相近的颜色刺激是至关重要的。
In the present study, we report the first evidence that ants discriminate and learn perceptually close colour stimuli. Foragers of the ant species Cataglyphis aenescens and Formica cunicularia were trained in a Y-maze choice apparatus to monochromatic light stimuli of a constant intensity associated with a food reward. Two stimuli, with a mean wavelength of 40 nm perceptual distance, were chosen from the UV (340 nm vs 380 nm) and the green (510 nm vs 550 nm) range because these species are UV-green dichromats. Foragers were trained with two conditioning paradigms [absolute conditioning (AC) and differential conditioning (DC)]. In the UV range, C. aenescens foragers failed to discriminate when presented with a small colour difference in both training procedures. Foragers also failed in the green range when trained with AC but showed significant bias towards the rewarded stimulus when trained with DC. Formica cunicularia foragers achieved the task in the UV range when trained with DC only. In the green range, F. cunicularia foragers showed clear preference for the rewarded stimulus in both training conditioning procedures. Foragers never failed in choosing the rewarded stimulus in DC even when the intensity of the rewarded stimulus was reduced by one log unit. This clearly indicates that DC is of paramount importance to discriminate perceptually close colour stimuli.