Comparative analysis of the size and shape of the lizard eye
Comparative analysis of the size and shape of the lizard eye
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DOI：
10.1016/j.zool.2007.04.003
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发表时间：
2008-01-01
期刊：
影响因子：
2
通讯作者：
Hall, Margaret I.
中科院分区：
文献类型：
--
作者：
Hall, Margaret I.
绿松石占据暗适应（光限制）和亮适应（光丰富）的环境，从而使这个分支的理想分析前夕形态适应。本研究探讨如何在蜥蜴的眼睛形态变化，根据活动在这些不同的光环境。测量收集的角膜直径和眼轴长度为239标本的116蜥蜴种（包括楔齿），包括这两个物种与暗适应和明视视觉适应。我表明，光水平提供给蜥蜴的视觉有一个显着的影响眼睛的形状和大小。暗视蜥蜴的眼睛形状是针对视觉灵敏度而优化的，角膜直径相对于眼轴长度更大。然而，明视蜥蜴并没有表现出绝对更大的轴长比暗视蜥蜴，和组有相同的绝对轴长的眼睛。结果还表明，蜥蜴所处的光照水平对眼睛形状（由角膜直径和眼睛轴长之间的关系定义）的影响比系统发育更显着。(C)2007年，Elsevier GmbH。All rights reserved.
Lizards occupy both scotopic (light-limited) and photopic (light-rich) environments, thereby making this clade ideal for analyses of eve morphology adaptations. This study examines how in lizards the morphology of the eye varies according to activity in these different light environments. Measurements were collected on corneal diameters and axial lengths of the eye for 239 specimens of 116 lizard species (including Sphenodon) that include both species with scotopic and photopic visual adaptations. I show that the light level available to a lizard for vision has a significant effect on eye shape and size. Scotopic lizards have eye shapes that are optimized for visual sensitivity, with larger corneal diameters relative to axial lengths. However, photopic lizards do not exhibit absolutely larger axial lengths than do scotopic lizards, and the groups have the same absolute axial lengths of the eye. Results also indicate that the light level the lizard functions under is a more significant influence on eye shape, as defined by the relationship between corneal diameter and axial length of the eye, than is phylogeny. (C) 2007 Elsevier GmbH. All rights reserved.