Geographic Variation in Clutch and Egg Size for the Lizard Phrynocephalus przewalskii(Squamata:Agamidae)

作     者：Yajuan WANG Weihong JI Wei ZHAO Nannan YU Naifa LIU 

作者机构：School of Life SciencesLanzhou University Institute of Natural SciencesMassey UniversityPrivate Bag 102904North Shore Mail Centre 

出 版 物：《Asian Herpetological Research》 (亚洲两栖爬行动物研究（英文版）)

年 卷 期：2011年第2卷第2期

页      面：97-102页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

主　　题：Phrynocephalus przewalskii reproductive parameter geographic variation egg size clutch size 

摘      要：In order to tease apart proximate vs. ultimate sources of variation in reproductive strategy, studies have increasingly focused on populations rather than species as the unit of interest. The reproductive parameters of Phrynocephalus przewalskii （Agamidae） in different populations within the same phylogenetic clade were compared in this study. Female SVL, clutch size, egg volume and clutch volume varied significantly among populations. With increase in latitude, clutch size increased, while egg size decreased. Relatively fewer but larger eggs were produced with increasing of population density. Food availability had positive effects on clutch size, but no effect on egg size. Our result indicated that latitude, food availability and population density may be the proximate factors affecting the reproductive parameters ofP. przewalskii.