Oct 12, 2017

Are viviparous lizards more vulnerable to climate warming because they have evolved reduced body temperature and heat tolerance?

Zheng WangXiang Ji


Lizards may experience population declines and extinctions on a similar scale to that experienced by amphibians, and climate warming is one hypothesis proposed to explain these declines and extinctions. Within lizards, viviparous species are hypothesized to be more vulnerable to climate warming, because they have evolved reduced body temperature and heat tolerance, but this idea remains untested. To test this hypothesis, we conducted three temperatures (20, 24, and 28 °C) × two species [Phrynocephalus przewalskii (oviparous) and P. putjatia (viviparous)] factorial design experiment that simulated warming on oviparous versus viviparous lizards. Our manipulation of ambient temperature affected activity and thermal preference in both species, birth date in P. putjatia, and egg mass in P. przewalskii; other examined traits (fecundity, reproductive output, and size, morphology, and sprint speed of offspring) were not affected. Neither in P. putjatia nor in P. przewalskii behavioral responses to rising temperatures differ between the sexes. The viviparous species thermoregulated more actively than did the oviparous species, but the two species did not differ in thermal preference. Warming reduced the activity time allotted for thermo...Continue Reading

  • References33
  • Citations


  • References33
  • Citations


  • This paper may not have been cited yet.

Mentioned in this Paper

Phrynocephalus putjatia
Body Temperature Changes
Pedicularis przewalskii
Science of Morphology
Pseudomonas sp. P-2
Viviparity, Nonmammalian

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Synthetic Genetic Array Analysis

Synthetic genetic arrays allow the systematic examination of genetic interactions. Here is the latest research focusing on synthetic genetic arrays and their analyses.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

Head And Neck Squamous Cell Carcinoma

Squamous cell carcinomas account for >90% of all tumors in the head and neck region. Head and neck squamous cell carcinoma incidence has increased dramatically recently with little improvement in patient outcomes. Here is the latest research on this aggressive malignancy.

Signaling in Adult Neurogenesis

Neural stem cells play a critical role in the production of neuronal cells in neurogenesis is of great importance. Of interest is the role signalling mechanisms in adult neurogenesis. Discover the latest research on signalling in adult neurogenesis.

Psychiatric Chronotherapy

Psychiatric Chronotherapy considers the circadian rhythm as a major factor for optimizing therapeutic efficacy of psychiatric interventions. Discover the latest research on Psychiatric Chronotherapy here.

Epigenetic Memory

Epigenetic memory refers to the heritable genetic changes that are not explained by the DNA sequence. Find the latest research on epigenetic memory here.

Bone Marrow Neoplasms

Bone Marrow Neoplasms are cancers that occur in the bone marrow. Discover the latest research on Bone Marrow Neoplasms here.