Differences in Incubation Length and Hatchling Morphology among Five Species of OviparousPhrynocephalus Lizards (Agamidae) from China
Differences in Incubation Length and Hatchling Morphology among Five Species of OviparousPhrynocephalus Lizards (Agamidae) from China
复制标题
DOI：
10.3724/sp.j.1245.2013.00225
复制
发表时间：
2013-12
影响因子：
1.4
通讯作者：
Zheng;Wang;Li;Ma;Min;Shao;Xiang;Ji
中科院分区：
文献类型：
--
作者：
Zheng;Wang;Li;Ma;Min;Shao;Xiang;Ji
我们孵化了五种沙蜥的卵（白纹伊蚊P.albolineatus、黄纹伊蚊P. axaxillae、黄纹伊蚊P.grumgrzimailoi、黄纹伊蚊P.helioscopus和普氏伊蚊P.przewalskii）（24°C，28°C和32°C）为了研究不同物种和不同温度处理下孵化期和孵化期形态的差异，我们将本研究的数据与以前报道的额蛙和杂色蛙的数据相结合，以研究产卵时的胚胎阶段是否是导致孵化时间的种间差异，以及从幼体形态学推断的系统发育关系与基于线粒体DNA数据的关系是否一致。孵化时间的平均值在本文研究的五个物种中存在差异，在所有这五个物种中，孵化期随温度升高而缩短，孵化期随温度升高而缩短结果表明，在3种温度处理条件下，沙蜥的体长、体质量和其它形态指标均存在差异。产蛋时的胚胎期是产蛋间和产蛋内根据幼体形态学推断的系统发育关系与目前已知的基于线粒体DNA数据的关系并不总是一致的。本研究的数据和以前报道的数据允许得出这样的结论：任何沙蜥物种可能有其独特的位置沿着轴定义的孵化形态。
We incubated eggs of five Phrynocephalus species(P.albolineatus,P.axillaries,P.grumgrzimailoi,P.helioscopus and P.przewalskii)at three constant temperatures(24°C,28°C and 32°C)to examine differences in incubation length and hatchling morphology among species and among temperature treatments.We combined data from this study with those reported previously for P.frontalis and P.versicolor to examine whether embryonic stage at laying is a causal factor for interspecific variation in incubation length,and whether the phylogenetic relationship inferred from hatchling morphology is consistent with the relationship based on mitochondrial DNA data.Mean values for incubation length differed among the five species studied herein and,in all these five species,incubation length decreased at a decreasing rate as temperature increased.In none of the five species did hatchling size(snout-vent length and body mass)and other morphological variables differ among the three temperature treatments.The seven oviparous Phrynocephalus lizards found in China differ from each other in hatchling morphology,and embryonic stage at laying is a causal factor of inter-and intra-specific variation in incubation length.The phylogenetic relationship inferred from hatchling morphology is not always consistent with the currently known relationship based on mitochondrial DNA data.Data from this study and those reported previously allow the conclusion that any Phrynocephalus species may have its unique position along the axis defined by hatchling morphology.