... that oxygen safety margins set thermal limits in air-breathing invertebrates. Bombyx mori Thermolimit respirometry Critical temperature Supply and demand Oxygen- and capacity-limited thermal tolerance The mechanisms underlying thermal tolerance are central to predicting climate change...

.... Thermolimit respirometry is a new technique that allows CT max to be quantified in small animals, such as insects, as the point of spiracular failure by measuring CO 2 release from the animal as temperature increases. Although prior studies have reported a characteristic pattern of CO 2 release for insects...

... be caused by oxygen- and capacity-limitation of thermal tolerance (OCLT), the mechanisms are poorly understood in air-breathing terrestrial insects. We used thermolimit respirometry to characterize entry into chill-coma in a laboratory population of fall field crickets ( Gryllus pennsylvanicus ). To detect...

... (or ambient) temperature at the onset of one of the physiological states mentioned above ( Lutterschmidt and Hutchison, 1997 ). To estimate CT max in individual flies we used a more objective method, namely thermolimit respirometry, in conjunction with constant monitoring of activity( Lighton and Turner...

..., which do not differ significantly. `Thermolimit respirometry' allows CT max to be estimated objectively with coefficients of variation ( s.d. /mean) <1%, lending confidence to comparisons between species or treatment groups. * Author for correspondence at address 1 (e-mail: [email protected]...