Specific dynamic action: a review of the postprandial metabolic response
- S. Secor
- Environmental ScienceJournal of Comparative Physiology □ B
There are innumerable opportunities for research in SDA including coverage of unexplored taxa, investigating the underlying sources, determinants, and the central control of postprandial metabolism, and examining the integration of SDA across other physiological systems.
Adaptive responses to feeding in Burmese pythons: pay before pumping.
The response of O2 consumption (referred to as specific dynamic action, SDA) is the largest, and the upregulation of intestinal nutrient transporters the second largest, response reported for any vertebrate upon feeding.
Postprandial remodeling of the gut microbiota in Burmese pythons
- E. Costello, J. Gordon, S. Secor, R. Knight
- Environmental Science, BiologyThe ISME Journal
- 1 November 2010
The observed large-scale alterations of the gut microbiota that accompany the Burmese python's own dramatic physiological and morphological changes during feeding and fasting emphasize the need to consider both microbial and host cellular responses to nutrient flux.
A vertebrate model of extreme physiological regulation
In juvenile pythons during feeding, there are large and rapid increases in metabolism and secretion, in the activation of enzymes and transporter proteins, and in tissue growth, which enable an economic hypothesis concerning the evolution of regulation to be tested.
Ventilatory and cardiovascular responses of a python (Python molurus) to exercise and digestion.
The capacities of the ventilatory and cardiovascular systems to transport oxygen to locomotor muscles are not a limiting factor in the attainment of peak metabolic rates during exercise in pythons.
Evolution of Regulatory Responses to Feeding in Snakes
Quantitative calculations of partial energy budgets suggest that energy savings drive the evolution of low mass and activities of organs during fasting and of large postfeeding regulatory responses in infrequent feeders.
Determinants of the Postfeeding Metabolic Response of Burmese Pythons, Python molurus
Sit-and-wait-foraging snakes, which consume large meals at long and unpredictable intervals, reduce standard metabolic rate by allowing the energetically expensive small intestine and other associated organs to atrophy between meals but thereby incur a large specific dynamic action while rebuilding those organs upon feeding.
Gastric function and its contribution to the postprandial metabolic response of the Burmese python Python molurus
- S. Secor
- BiologyJournal of Experimental Biology
- 15 May 2003
Operating on a `pay before pumping' principle, pythons must expend endogenous energy in order to initiate acid production and other digestive processes before ingested nutrients can be absorbed and channeled into metabolic pathways.
Regulation of digestive performance: a proposed adaptive response.
- S. Secor
- Environmental ScienceComparative biochemistry and physiology. Part A…
- 1 March 2001
Ecological Significance of Movements and Activity Range for the Sidewinder, Crotalus cerastes
- S. Secor
- Environmental Science
- 17 August 1994
It is speculated that overwintering in rodent burrows at the sand-alluvial interface of the study site to overwinter increases overwinters' survival because of decreased likelihood of exposure to freezing subsurface temperatures, greater structural stability of burrows, and lower risk of predation.