Feeding capability in the extinct giant Siamogale melilutra and comparative mandibular biomechanics of living Lutrinae

doi:10.1038/s41598-017-15391-9

IVPP-IR > 中科院古脊椎所（2000年以后）

	Feeding capability in the extinct giant Siamogale melilutra and comparative mandibular biomechanics of living Lutrinae
	Tseng, Z. Jack 1,2,3; Su, Denise F.4; Wang, Xiaoming 2,3,5; White, Stuart C.6; Ji, Xueping 7
	2017-11-09
发表期刊	SCIENTIFIC REPORTS
卷号	7
文章类型	Article
摘要	At 50 kg in estimated weight, the extinct Siamogale melilutra is larger than all living otters, and ranks among the largest fossil otters. The biomechanical capability of S. melilutra jaws as related to their large size is unknown but crucial to reconstructing the species' potentially unique ecological niche. Here we compare the mandibular biomechanics of S. melilutra using engineering-based performance measures against ten extant otter biomechanical models. Despite a wide range of feeding preferences from durophagy to piscivory, living otter species exhibit a linear relationship between mandible stiffness and volume, as expected in isometric model scaling. In contrast, S. melilutra models exhibit a six-fold increase in stiffness from expected stiffness-volume relationships calculated from extant species models. Unlike stiffness, mechanical efficiency of biting is conserved among living otters and in S. melilutra. These findings indicate that although similar to living bunodont otters in morphology and biting efficiency, jaw strength in S. melilutra far surpasses molluscivores such as sea otters and Cape clawless otters, even after accounting for size. Therefore, Siamogale represents a feeding ecomorphology with no living analog, and its giant size and high mandibular strength confer shell-crushing capability matched only by other extinct molluscivores such as the marine bear Kolponomos.
WOS标题词	Science & Technology
DOI	10.1038/s41598-017-15391-9
关键词[WOS]	FINITE-ELEMENT MODELS ; CARNIVORANS ; PERFORMANCE
收录类别	SCI
语种	英语
项目资助者	United States National Science Foundation(DEB-1257572 ; Yunnan Natural Science Foundation ; Government of Zhaotong(2010CC010) ; Institute of Vertebrate Paleontology and Paleoanthropology ; National Natural Science Foundation of China(41430102) ; government of Zhaotong ; government of Zhaoyang ; BCS-1035897 ; BCS-0321893 ; BCS-1227964 ; BCS-1227927 ; BCS-1227838)
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000414810800048
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7875
专题	中科院古脊椎所（2000年以后）
作者单位	1.Univ Buffalo, Jacobs Sch Med & Biomed Sci, Dept Pathol & Anat Sci, Buffalo, NY 14260 USA 2.Amer Museum Nat Hist, Div Paleontol, Pk West 79th St, New York, NY 10024 USA 3.Nat Hist Museum Angeles Cty, Dept Vertebrate Paleontol, 900 Exposition Blvd, Los Angeles, CA 90007 USA 4.Cleveland Museum Nat Hist, Dept Paleobotany & Paleoecol, 1 Wade Oval Dr,Univ Circle, Cleveland, OH 44106 USA 5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 6.Univ Calif Los Angeles, Sch Dent, 10833 Le Conte Ave, Los Angeles, CA 90095 USA 7.Yunnan Inst Cultural Rel & Archaeol, 15-1 Chunmingli, Kunming 650118, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Tseng, Z. Jack,Su, Denise F.,Wang, Xiaoming,et al. Feeding capability in the extinct giant Siamogale melilutra and comparative mandibular biomechanics of living Lutrinae[J]. SCIENTIFIC REPORTS,2017,7.
APA	Tseng, Z. Jack,Su, Denise F.,Wang, Xiaoming,White, Stuart C.,&Ji, Xueping.(2017).Feeding capability in the extinct giant Siamogale melilutra and comparative mandibular biomechanics of living Lutrinae.SCIENTIFIC REPORTS,7.
MLA	Tseng, Z. Jack,et al."Feeding capability in the extinct giant Siamogale melilutra and comparative mandibular biomechanics of living Lutrinae".SCIENTIFIC REPORTS 7(2017).