Has any one heard of research on the Antelope Squirrels metabolic abilities?

I was just wondering if anyone had heard anything about research on the Antelope Squirrels ability to adjust its metabolism with temperature change even from night to day and vis versa? My prof mentioned it in class today and it sparked my interest so if anyone could provide any info about how this is possible that'd be great!Has any one heard of research on the Antelope Squirrels metabolic abilities?
Daily energy expenditure increased from April to October, and metabolic rate dropped at night (Karasov 1981).


http://digital-desert.com/wildlife/antel鈥?/a>





Wintertime energy conservation by huddling in antelope ground squirrels


http://www.publish.csiro.au/paper/ZO9940鈥?/a>





The following graph shows two mammals (endotherms) that occur in hot, desert conditions. The antelope ground squirrel is a small mammal (a ground squirrel);


http://www.utm.edu/departments/cens/biol鈥?/a>