Sibeaux Adélaïde, Keser Madison L, Cole Gemma L, Kranz Alexandrea M, Endler John A
Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC 3216, Australia.
Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC 3216, Australia.
Vision Res. 2019 May;158:78-89. doi: 10.1016/j.visres.2019.02.007. Epub 2019 Mar 7.
Visual pigments can vary across the retina in many vertebrates, but the behavioural consequences of this retinal heterogeneity are unknown. Guppies (Poecilia reticulata) vary dorsoventrally in visual pigments and forage both on the ground and at the water surface, exposing different retinal regions to two very different visual environments. We tested guppy behaviour towards a moving stimulus presented below or above the guppy. We used 12 different narrow-band wavelength stimuli matching each of the opsin peak sensitivities presented either at the top or the bottom of our experimental apparatus. We analysed behaviours of 50 male and 50 female guppies over 4800 trials where a moving stimulus pattern was presented to each guppy. We found that wavelength, position and speed of the stimuli influenced male and female behaviour and seems to be mediated by the long wavelength sensitive photoreceptors. Males also had stronger behavioural responses than females whereas females performed more foraging-related pecking behaviour. Our results suggest that the spatial requirement of visual tasks and their ecological context are important and appear to be partly correlated with photoreceptor arrangement in the retina.
在许多脊椎动物中，视觉色素在视网膜上可能会有所不同，但这种视网膜异质性的行为后果尚不清楚。孔雀鱼（Poecilia reticulata）的视觉色素在背腹方向上存在差异，它们在水底和水面觅食，使不同的视网膜区域暴露于两种截然不同的视觉环境中。我们测试了孔雀鱼对在其下方或上方呈现的移动刺激的行为反应。我们使用了12种不同的窄带波长刺激，这些刺激与我们实验装置顶部或底部呈现的每种视蛋白峰值敏感度相匹配。我们分析了50只雄性和50只雌性孔雀鱼在4800次试验中的行为，每次试验向每只孔雀鱼呈现一个移动刺激模式。我们发现，刺激的波长、位置和速度会影响雄性和雌性的行为，并且似乎是由长波长敏感光感受器介导的。雄性的行为反应也比雌性更强，而雌性则表现出更多与觅食相关的啄食行为。我们的结果表明，视觉任务的空间需求及其生态背景很重要，并且似乎与视网膜中的光感受器排列部分相关。
