Metabolic recovery in the Desert Iguana ( Dipsosaurus dorsalis ) following activities of varied intensity and duration

摘要: Summary 1  Elevated oxygen consumption during recovery is the majority of total metabolic costs associated with short vigorous activity, thus any assessment such activity should also examine excess postexercise (EPOC). This study examined EPOC and in Dipsosaurus (N = 8; 75 ± 3 g) over a variety submaximal intensities: 50%, 100% 400% maximum aerobic speed (MAS = 0·27 m s−1; at which VO2max elicited). Activity duration was varied (15, 60 300 s) these intensities. 2  Total increased significantly both intensity duration. intensity. higher intensities, but not lowest 50% MAS. 3  These constitute amounts energy large enough to have an impact on budget analyses. The cost individual bout subsequent as high 5% predicted daily expenditure, increase 5–8 × estimates that do incorporate recovery. 4  To compare relative economy different regimens, (Cact; ml O2 g−1 km−1), calculated costs, including EPOC, per unit distance travelled. Cact independent ranges, inversely related duration. 5  From data, most economical strategy travel certain would utilize low-intensity extended duration, seen regular activities foraging. High-intensity activities, escape, prey capture or mating behaviours, are be less economical. only observed where considered secondary more proximal needs animal.