Comparative study on adaptive thermogenic capacity during high-temperature acclimation of three sympatric rodents

In order to explore how the sympatric species of Eothenomys olitor,Apodemus chevrieri,Eothenomys miletus will adjust their thermogenic capacity to adapt to the environment under the background of global warming,as well as which species has stronger high-temperature adaptation ability.Body mass,liver and brown adipose tissue(BAT)mass and their protein contents under high-temperature conditions(30±1°C,acclimation for 28 days)were measured in the present study.The results showed that all three kinds of animals in the warm acclimation group increased body mass and reduced thermogenic capacity,in which the indicators of thermogenesis for E.olitor had the smallest change range,and there were significant differences in body mass and thermogenic capacity among the three species.All of the above results suggested that the three sympatric rodents chosen to increase their body mass,reduced thermogenesis and energy consumption to adapt to the environment under high temperature conditions,which showed a phenomenon of convergent adaptation.Moreover,the change amplitude of the E.olitor was the smallest,indicating that high temperature has the least impact on its survival,indicating that E.olitor may had stronger adaptability under the conditions of global warming.