The big squeeze: scaling of constriction pressure in two of the world's largest snakes, Python reticulatus and Python molurus bivittatus
| Autor: | Brad R. Moon, Schuyler F. Dartez, David A. Penning |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
biology
Physiology Ecology Aquatic Science biology.organism_classification Constriction Predation Rats Boidae Insect Science Predatory Behavior Neural function cardiovascular system Python (genus) Pressure Animals Body Size Animal Science and Zoology Rabbits Molecular Biology Burmese python Ecology Evolution Behavior and Systematics Molurus bivittatus circulatory and respiratory physiology |
| Zdroj: | The Journal of experimental biology. 218(Pt 21) |
| ISSN: | 1477-9145 |
| Popis: | Snakes are important predators that have radiated throughout many ecosystems, and constriction was important in their radiation. Constrictors immobilize and kill prey by using body loops to exert pressure on their prey. Despite its importance, little is known about constriction performance or its full effects on prey. We studied the scaling of constriction performance in two species of giant pythons (Python reticulatus Schneider 1801 and Python molurus bivittatus Kuhl 1820) and propose a new mechanism of prey death by constriction. In both species, peak constriction pressure increased significantly with snake diameter. These and other constrictors can exert pressures dramatically higher than their prey's blood pressure, suggesting that constriction can stop circulatory function and perhaps kill prey rapidly by over-pressurizing the brain and disrupting neural function. We propose the latter “red-out effect” as another possible mechanism of prey death from constriction. These effects may be important to recognize and treat properly in rare cases when constrictors injure humans. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|