Insularity effects on the morphological space and sexual dimorphism of a tropical tree lizard in western Mexico,Journal of Zoology

当前位置： X-MOL 学术 › J. Zool. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Insularity effects on the morphological space and sexual dimorphism of a tropical tree lizard in western Mexico
Journal of Zoology ( IF 1.9 ) Pub Date : 2020-05-12 , DOI: 10.1111/jzo.12783
H. H. Siliceo‐Cantero ₁ , J. Benítez‐Malvido ₁ , I. Suazo‐Ortuño ₂

Affiliation

Ecological interactions of lizards on islands tend to differ from those on the mainland, with a decrease in predation and interspecific competition and an increase in intraspecific competition. This may drive morphological divergences from their mainland counterparts, presenting gigantism and frequently sexual dimorphism. The aim of this study was to determine morphological divergence (i.e. head and limbs) and sexual dimorphism in the arboreal lizard Urosaurus bicarinatus on San Agustin Island off the Mexican Pacific Coast. We measured several morphological structures of U. bicarinatus on San Agustin Island, as well as on the adjacent mainland in the state of Jalisco, Mexico. Additionally, we measured individuals from the state of Michoacán and from a preserved collection with individuals from Michoacán and Guerrero. Our results indicated a divergence and an expansion of the morphological space of the island population compared with the mainland. The divergence was accompanied by dwarfism (reduction of the head and limbs with respect to body size) and a lack of sexual dimorphism in morphology and size. Our study contributes to understanding the effect of insularity on lizards’ populations and enriches the knowledge concerning phrynosomatids such as U. bicarinatus.

中文翻译：

隔绝对墨西哥西部热带树蜥蜴的形态空间和性二态性的影响

岛上蜥蜴的生态相互作用往往与大陆上的蜥蜴不同，捕食和种间竞争减少，种内竞争增加。这可能会导致它们与大陆同行的形态差异，呈现出巨大的特征，并经常出现性二态性。这项研究的目的是确定墨西哥太平洋沿岸圣奥古斯丁岛上的树栖蜥蜴Urosaurus bicarinatus的形态差异（即头和四肢）和性二态性。我们测量了U的几种形态结构。 比卡里纳图斯在圣奥古斯丁岛，以及墨西哥哈利斯科州的相邻大陆上。此外，我们还对来自米却肯州以及保存完好的藏品的人进行了测量，其中包括来自米却肯州和格雷罗州的人。我们的结果表明，与大陆相比，岛屿人口的形态空间有所扩大。这种分歧伴随着侏儒症（头部和四肢相对于体型的缩小）以及形态和体型上缺乏性二态性。我们的研究有助于理解岛离对蜥蜴种群的影响，并丰富了有关诸如U的象鼻类线虫的知识。 比卡里纳图斯。

更新日期：2020-05-12

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11