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

doi:10.1038/s41598-017-15391-9

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	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
刊名	SCIENTIFIC REPORTS
	2017-11-09
卷号	7
DOI	10.1038/s41598-017-15391-9
文献子类	Article
英文摘要	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关键词	FINITE-ELEMENT MODELS ; CARNIVORANS ; PERFORMANCE
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000414810800048
资助机构	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)
内容类型	期刊论文
源URL	[http://124.16.247.212/handle/311034/7934]
专题	古脊椎动物与古人类研究所_图书馆1
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).