检索结果-南通市图书馆

Sex Ratio and Sexual Size Dimorphism in a toad-headed lizard, Phrynocephalus guinanensis

Asian Herpetological Research 2018年第1期9卷 35-42页

作者： Kailong ZHANG Haojie TONG Yubin WO Naifa LIU Yuanting JIN College of Life Sciences China Jiliang University School of Life Sciences Lanzhou University

Phrynocephalus guinanensis has sexual dimorphism in abdominal coloration, but its ontogenetic development of sexual size dimorphism （SSD） is unknown. Using mark-recapture data during four days each year from August from 2014 to 2016, we investigated the development of sex ratios, SSD, sex-specific survivorship and growth rates in a population of P guinanensis. Our results indicated that the sex ratio of males to females was 1：2.8. Males had a lower survival rate （6%） than females （14%） across the age range from hatchling to adult, which supported the discovered female-biased sex ratio potentially associated with the low survival rate of males between hatchlings and juveniles. Male-biased SSD in tail length and head width existed in adults rather than in hatchling or juvenile lizards. The growth rates in body dimensions were undistinguishable between the sexes during the age from hatchling to juvenile, but the growth rate in head length from juvenile to adult was significantly larger in males than females. Average growth rate of all morphological measurements from hatchling to juvenile were larger compared with corresponding measurements from juvenile to adult, but only being significant in tail length, head width, abdomen length in females and snout-vent length in males. We provided a case study to strengthen our understanding of the important life history traits on how a viviparous lizard population can survive and develop their morphology in cold climates.

关键词： toad-headed lizard mark-recapture sexual size dimorphism growth rate survivorship sex ratio

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Role of Environmental Stress in Determining Gut Microbiome:Case Study of Two Sympatric toad-headed lizards

引用

Asian Herpetological Research 2020年第4期11卷 373-380页

作者： Yue Qi Wei ZHAO Yangyang ZHAO Xiaoning WANG Chenkai NIU Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution School of Life SciencesLanzhou UniversityLanzhou 730000GansuChina

The gut microbiota has gained attention because of its importance in facilitating host survival and ***,it is unclear whether gut microbial communities are determined by the host(heritable factor) or environment(environmental factor).In this study,we investigated the gut microbial communities and potential functional signatures of two sympatric species distributed along an elevation gradient,the toadheaded lizards Phrynocephalus axillaris and *** results indicated that at high elevations,the gut microbial communities of *** and *** did not significantly differ,and the phylogenetic relationships of gut microbial communities contradicted their *** low altitudes,the two lizards could be distinguished based on their significantly different gut microbial *** to low-altitude populations,Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis showed that at higher altitudes,energy metabolism,such as carbohydrate,lipid,and amino acids metabolism were higher in both *** a larger number of pathogenic bacteria were found in the lowaltitude population of *** suggests that the convergence of gut microbiota of two lizards at highaltitude stem from environmental factors,as they were exposed to the same environmental stress,whereas the divergence at low-altitude stemmed from heritable factors,as they were exposed to different environmental *** results provide a new perspective regarding whether heritable or environmental factors dominate the gut microbiota during exposure to environmental stress.

关键词： gut microbiota environmental factor environmental stress heritable factor toad-headed lizard

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Diet, Food Intake of Phrynocephalus frontalis (Agamidae) and Its Potential Role in Desert Habitat

引用

Asian Herpetological Research 2013年第4期4卷 248-253页

作者： Chunwang LI Xue LIAN Songhua TANG Junhuai BI Zhigang JIANG Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences College of Life Science Inner Mongolia Normal University

We examined the dietary diversity and food intake of Phrynocephalus frontalis, compared the difference of insect diversity in the natural habitats with different lizard densities, and discussed the potential role of this lizard in the desert ecosystem. The results show that：（1） arthropodans of the orders Coleoptera, Hymenoptera and Hemiptera were major dietary components of P. frontalis; （2） coleoptera larvae always formed the predominant component of lizard diets; （3） dietary diversities of P. frontalis were not significantly different between summer and autumn or between the two sexes; （4） the similarity in trophic niches between seasons was 0.756, whereas the similarity in trophic niches between sexes was 0.994; （5） stomach content weight of lizards varied significantly among different seasons, but there was no significant difference in stomach content weight between sexes; （6） insect diversity differed significantly among the groups of the habitat with different degrees of lizard density, and the habitat with moderate lizards density had the highest insect diversity. We infer that P. frontalis prey mainly on insects and change their diet and food intake with season; males and females consumed similar preys in types and weights. As an important predator, P. frontalis could affect the insect community in the arid ecosystem of Hunshandak Desert on the Mongolian Plateau.

关键词： toad-headed lizard desert lizard feeding habits prey diversity desert grassland

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：