Body Size and Reproductive Tactics in Varanid lizards

Yu, Du; Longhui, Lin; Yao, Yun-Tao; Lin, Chenggang; Ji, Xiang

doi:10.3724/sp.j.1245.2014.00263

Cited by 4 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, we used high-throughput sequencing to study dietary correlates of oral and gut microbiota in the water monitor lizard, Varanus salvator (Laurenti, 1768). This large-sized (up to 1,170 mm snout-vent length; Traeholt, 1998) oviparous lizard is listed in CITES Appendix II and has a range covering Bangladesh, Brunei, Indo-China Peninsula, Indonesia, Northeast India, South-Southwest China, and Sri Lanka (Du et al, 2014). We address two main questions:…”

Section: Introductionmentioning

confidence: 99%

Dietary Correlates of Oral and Gut Microbiota in the Water Monitor Lizard, Varanus salvator (Laurenti, 1768)

Chen

Liu

et al. 2022

Front. Microbiol.

View full text Add to dashboard Cite

Numerous studies have demonstrated that food shapes the structure and composition of the host’s oral and gut microbiota. The disorder of oral and gut microbiota may trigger various host diseases. Here, we collected oral and gut samples from wild water monitor lizards (Varanus salvator) and their captive conspecifics fed with bullfrogs, eggs, and depilated chicken, aiming to examine dietary correlates of oral and gut microbiota. We used the 16S rRNA gene sequencing technology to analyze the composition of the microbiota. Proteobacteria and Bacteroidota were the dominant phyla in the oral microbiota, and so were in the gut microbiota. The alpha diversity of microbiota was significantly higher in the gut than in the oral cavity, and the alpha diversity of oral microbiota was higher in captive lizards than in wild conspecifics. Comparing the relative abundance of oral and gut bacteria and their gene functions, differences among different animal groups presumably resulted from human contact in artificial breeding environments and complex food processing. Differences in gene function might be related to the absolute number and/or the taxonomic abundance of oral and gut microorganisms in the wild and the water environment. This study provides not only basic information about the oral and gut microbiota of captive and wild water monitor lizards, but also an inference that feeding on frogs and aquatic products and reducing human exposure help water monitor lizards maintain a microbiota similar to that in the wild environment.

show abstract

Section: Introductionmentioning

confidence: 99%

Dietary Correlates of Oral and Gut Microbiota in the Water Monitor Lizard, Varanus salvator (Laurenti, 1768)

Chen

Liu

et al. 2022

Front. Microbiol.

View full text Add to dashboard Cite

show abstract

“…PGLS regression incorporates phylogenetic information into generalized linear models and offers a powerful methodology for analyzing continuous data. Previously, it has been applied to estimate the evolutionary relationship between traits of interest (Warne & Charnov, 2008;Barros, Herrel & Kohlsdorf, 2011;Yu et al, 2014). In PGLS regression, the strength and type of phylogenetic signal in the data matrix can be accounted for by adjusting branch length, which can be optimized to find the maximum likelihood transformation.…”

Section: Data Analysesmentioning

confidence: 99%

Acoustic divergence in advertisement calls among three sympatricMicrohylaspecies from East China

Chen

Lin

Tang

et al. 2020

PeerJ

View full text Add to dashboard Cite

Background Species-specific advertisement calls are the main mechanism of transmitting information between individuals in anuran amphibians and are therefore indispensable for anuran survival and reproduction. Survey methods that monitor these calls can be used for rapid species recognition, behavioral experiments, and conservation monitoring. In this study, we described in detail 10 call parameters from three sympatric species in the genus Microhyla and analyzed the differences in call parameter among these species to provide a basis for systematic monitoring, acoustic analysis and taxonomic study of this genus. Methods The quantitative analyses of temporal and spectral call parameters were used in our study for the advertisement calls of three sympatric Microhyla species (M. beilunensis, M. fissipes and M. heymonsi) in Zhejiang Province, East China. Results Our results showed the following: (1) Significant differences existed among the three sympatric Microhyla species in call duration (CD), call interval (CI), number of pulses (NP), pulse rate, call intensity (CIT), dominant frequency (DF) and frequency of the first to fourth formants (F1, F2, F3 and F4). (2) Some spectral parameters (DF, F1 and F3) were negatively correlated with the body size of the vocalizing individuals in each species. (3) The coefficients of variation within individuals (CVw) for CIT, DF and F1–F4 were smaller than 5%, whereas the CVW for CI was larger than 10% in each species. (4) The principal component analysis and discriminant function analysis showed that call parameters could distinguish the three Microhyla species. (5) The phylogenetic generalized least squares analysis showed that phylogenetic relationships affected CD and NP against snout-vent length (SVL), DF and NP against CD, and NP against DF, but not of DF against SVL; based on the phylogenetic analysis, CD and NP were not related to SVL, but DF was negatively related to SVL.

show abstract

“…1). The species is an ideal species to study the population genetic differentiation along geographic gradients because it is commonly found on ponds and ditches near the tree and grass or land around the rice fields (Fei et al 2009;Yu et al 2016;Zhao et al 2022). In recent years, the decreases in habitats and population sizes of the species are likely to relate to the rapid urbanization and climate change (Fei et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Genomic differentiation with isolation by distance along a latitudinal gradient in the spotted‐leg treefrogPolypedates megacephalus

2022

View full text Add to dashboard Cite

The patterns of isolation by distance (IBD) entailing increased genetic differentiation among populations have aroused extensive concerns for evolutionary biologists. Although the IBD may act on spatial processes contributing to the genetic differentiation among populations in anuran species, the factors shaping the IBD of frogs among populations in natural systems are largely unknown. Here, we studied the genetic differentiation among six populations with 24 individuals of the spotted‐leg treefrog along a latitudinal gradient (1860.31 km) based on 1020 single nucleotide polymorphisms from restriction site‐associated DNA sequencing. The results showed that the genetic diversity differed significantly among populations and that the insular populations had higher genetic diversity than the mainland populations. Furthermore, we also found a significant genetic differentiation among populations (FST = 0.277) and no sign of inbreeding (FUNI = −0.145). The IBD was detected for all populations, and a higher degree of the IBD was indicated when controlling for the effects of the isolation between Hainan and mainland populations caused by the Qiongzhou Strait. Our findings suggest that the form of the Qiongzhou Strait plays a key role in shaping the genetic diversity and population differentiation in treefrogs.

show abstract

Body Size and Reproductive Tactics in Varanid lizards

Cited by 4 publications

References 37 publications

Dietary Correlates of Oral and Gut Microbiota in the Water Monitor Lizard, Varanus salvator (Laurenti, 1768)

Dietary Correlates of Oral and Gut Microbiota in the Water Monitor Lizard, Varanus salvator (Laurenti, 1768)

Acoustic divergence in advertisement calls among three sympatricMicrohylaspecies from East China

Genomic differentiation with isolation by distance along a latitudinal gradient in the spotted‐leg treefrogPolypedates megacephalus

Contact Info

Product

Resources

About