干旱区生态环境知识资源中心(Arid): Snakes partition their body to traverse large steps stably

Arid

DOI	10.1242/jeb.185991
	Snakes partition their body to traverse large steps stably
	Gart, Sean W.1,2; Mitchel, Thomas W.1; Li, Chen 1
通讯作者	Li, Chen
来源期刊	JOURNAL OF EXPERIMENTAL BIOLOGY
ISSN	0022-0949
EISSN	1477-9145
出版年	2019
卷号	222 期号:8
英文摘要	Many snakes live in deserts, forests and river valleys and traverse challenging 3-D terrain such as rocks, felled trees and rubble, with obstacles as large as themselves and variable surface properties. By contrast, apart from branch cantilevering, burrowing, swimming and gliding, laboratory studies of snake locomotion have focused on locomotion on simple flat surfaces. Here, to begin to understand snake locomotion in complex 3-D terrain, we studied how the variable kingsnake, a terrestrial generalist, traversed a large step of variable surface friction and step height (up to 30% snout-vent length). The snake traversed by partitioning its body into three sections with distinct functions. Body sections below and above the step oscillated laterally on horizontal surfaces for propulsion, whereas the body section in between cantilevered in a vertical plane to bridge the large height increase. As the animal progressed, these three sections traveled down its body, conforming overall body shape to the step. In addition, the snake adjusted the partitioned gait in response to increase in step height and decrease in surface friction, at the cost of reduced speed. As surface friction decreased, body movement below and above the step changed from a continuous lateral undulation with little slip to an intermittent oscillatory movement with much slip, and initial head lift-off became closer to the step. Given these adjustments, body partitioning allowed the snake to be always stable, even when initially cantilevering but before reaching the surface above. Such a partitioned gait may be generally useful for diverse, complex 3-D terrain.
英文关键词	Lampropeltis mexicana Locomotion Obstacle traversal Complex terrain Terradynamics
类型	Article
语种	英语
国家	USA
开放获取类型	Green Submitted, hybrid
收录类别	SCI-E
WOS记录号	WOS:000466766400001
WOS关键词	BRIDGING PERFORMANCE ; ARBOREAL LOCOMOTION ; KINEMATICS ; COCKROACHES ; PROPULSION ; MECHANICS ; PATTERN
WOS类目	Biology
WOS研究方向	Life Sciences & Biomedicine - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216990
作者单位	1.Johns Hopkins Univ, Dept Mech Engn, 3400 N Charles St,126 Hackerman Hall, Baltimore, MD 21218 USA; 2.US Army, Res Lab, Aberdeen Proving Ground, MD 21005 USA
推荐引用方式 GB/T 7714	Gart, Sean W.,Mitchel, Thomas W.,Li, Chen. Snakes partition their body to traverse large steps stably[J],2019,222(8).
APA	Gart, Sean W.,Mitchel, Thomas W.,&Li, Chen.(2019).Snakes partition their body to traverse large steps stably.JOURNAL OF EXPERIMENTAL BIOLOGY,222(8).
MLA	Gart, Sean W.,et al."Snakes partition their body to traverse large steps stably".JOURNAL OF EXPERIMENTAL BIOLOGY 222.8(2019).