干旱区生态环境知识资源中心(Arid): Comparative analysis of Dipodomys species indicates that kangaroo rat hindlimb anatomy is adapted for rapid evasive leaping

Arid

DOI	10.1111/joa.13567
	Comparative analysis of Dipodomys species indicates that kangaroo rat hindlimb anatomy is adapted for rapid evasive leaping
	Freymiller, Grace A.; Whitford, Malachi D.; Schwaner, M. Janneke; McGowan, Craig P.; Higham, Timothy E.; Clark, Rulon W.
通讯作者	Freymiller, GA (corresponding author), San Diego State Univ, Dept Biol, San Diego, CA 92182 USA.
来源期刊	JOURNAL OF ANATOMY
ISSN	0021-8782
EISSN	1469-7580
出版年	2022
英文摘要	Body size is a key factor that influences antipredator behavior. For animals that rely on jumping to escape from predators, there is a theoretical trade-off between jump distance and acceleration as body size changes at both the inter- and intraspecific levels. Assuming geometric similarity, acceleration will decrease with increasing body size due to a smaller increase in muscle cross-sectional area than body mass. Smaller animals will likely have a similar jump distance as larger animals due to their shorter limbs and faster accelerations. Therefore, in order to maintain acceleration in a jump across different body sizes, hind limbs must be disproportionately bigger for larger animals. We explored this prediction using four species of kangaroo rats (Dipodomys spp.), a genus of bipedal rodent with similar morphology across a range of body sizes (40-150 g). Kangaroo rat jump performance was measured by simulating snake strikes to free-ranging individuals. Additionally, morphological measurements of hind limb muscles and segment lengths were obtained from thawed frozen specimens. Overall, jump acceleration was constant across body sizes and jump distance increased with increasing size. Additionally, kangaroo rat hind limb muscle mass and cross-sectional area scaled with positive allometry. Ankle extensor tendon cross-sectional area also scaled with positive allometry. Hind limb segment length scaled isometrically, with the exception of the metatarsals, which scaled with negative allometry. Overall, these findings support the hypothesis that kangaroo rat hind limbs are built to maintain jump acceleration rather than jump distance. Selective pressure from single-strike predators, such as snakes and owls, likely drives this relationship.
英文关键词	allometry body size morphology muscle performance segment length
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000707142700001
WOS关键词	ELASTIC ENERGY-STORAGE ; ESCAPE PERFORMANCE ; STRIKE BEHAVIOR ; DESERT RODENTS ; OWL PREDATION ; BODY-SIZE ; MORPHOLOGY ; MICROHABITAT ; ONTOGENY
WOS类目	Anatomy & Morphology
WOS研究方向	Anatomy & Morphology
来源机构	University of California, Davis
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363719
作者单位	[Freymiller, Grace A.; Whitford, Malachi D.; Clark, Rulon W.] San Diego State Univ, Dept Biol, San Diego, CA 92182 USA; [Freymiller, Grace A.; Higham, Timothy E.] Univ Calif Riverside, Dept Evolut Ecol & Organismal Biol, Riverside, CA 92521 USA; [Whitford, Malachi D.] Univ Calif Davis, Grad Grp Ecol, Davis, CA 95616 USA; [Schwaner, M. Janneke] Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA USA; [McGowan, Craig P.] Univ Southern Calif, Keck Sch Med, Los Angeles, CA 90007 USA; [Clark, Rulon W.] Chiricahua Desert Museum, Rodeo, NM USA
推荐引用方式 GB/T 7714	Freymiller, Grace A.,Whitford, Malachi D.,Schwaner, M. Janneke,et al. Comparative analysis of Dipodomys species indicates that kangaroo rat hindlimb anatomy is adapted for rapid evasive leaping[J]. University of California, Davis,2022.
APA	Freymiller, Grace A.,Whitford, Malachi D.,Schwaner, M. Janneke,McGowan, Craig P.,Higham, Timothy E.,&Clark, Rulon W..(2022).Comparative analysis of Dipodomys species indicates that kangaroo rat hindlimb anatomy is adapted for rapid evasive leaping.JOURNAL OF ANATOMY.
MLA	Freymiller, Grace A.,et al."Comparative analysis of Dipodomys species indicates that kangaroo rat hindlimb anatomy is adapted for rapid evasive leaping".JOURNAL OF ANATOMY (2022).