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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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The morphological evolution of the forelimb of frogs (Anura) in adaption to arboreal environment
Author of the article:YANG Tong, JIANG Dechun, DANG Ningxin, LI Jia-Tang
Author's Workplace:1. CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu 610041, Sichuan, PR China; 2. University of Chinese Academy of Sciences, Beijing 100049, PR China
Key Words:arboreal adaptation, morphological evolution, hand length, radio-ulna length, frogs
Abstract:Anura are among the most diverse groups of vertebrates and occupy a wide range of habitats. Arboreal anurans are flat bodied, with relatively long forelimbs. To determine the relationships between morphology and habitats/phylogeny, we compared the forelimb morphology of arboreal and non-arboreal frogs (a total of 692 samples) and used phylogenetic comparative methods to interpret observed differences. Our results indicated that the evolution of hand and radio-ulna lengths were affected by different factors. Habitats had a potentially more positive effect on the extension of the hand (Wilcoxon rank sum test: P=2.20e-16; PIC: P=2.34e-05, r2=0.465 8), while heredity could be the main factor affecting the length of the radio-ulna, without an obvious relation to habitats (Wilcoxon rank sum test: P=1.77e-05; PIC: P=0.058 4, r2=0.118 1). This study will help to better understand the relationship between the evolution of the forelimb morphology and habitats, and thus provide support for the study of the environmental adaptation of Anura.
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