干旱区生态环境知识资源中心(Arid): Canines and carnassials as indicators of sociality in durophagous hyaenids: analyzing the past to understand the present

Arid

DOI	10.7717/peerj.10541
	Canines and carnassials as indicators of sociality in durophagous hyaenids: analyzing the past to understand the present
	Antonio Perez-Claros, Juan; Coca-Ortega, Carlos
通讯作者	Perez-Claros, JA (corresponding author), Univ Malaga, Fac Ciencias, Dept Ecol & Geol, Malaga, Spain.
来源期刊	PEERJ
ISSN	2167-8359
出版年	2020
卷号	8
英文摘要	We analyzed the lower and upper dentition of the family Hyaenidae along its evolutionary history from a multivariate point of view. A total of 13,103 individual measurements of the lengths and widths of canines and the main post-canine teeth (lower third and fourth premolar, lower first molar, and upper second, third, and fourth premolars) were collected for 39 extinct and extant species of this family. We analyzed these measurements using principal component analyses. The multivariate structure characterized the main groups of previously defined hyaenid ecomorphs. Strikingly, our analyses also detected differences between social hunting durophages (such as Crocuta crocuta) and solitary scavengers (such as Hyaena hyaena or Parahyaena brunnea). Concerning the hyaenid bauplan, social hunters have large carnassials and smaller canines, whereas solitary scavengers show the exact opposite morphological adaptations. Additionally, scavengers exhibited upper canines larger than lower ones, whereas hunters have upper and lower canines of similar size. It is hypothesized that sociality has led to an increase in carnassial length for hunting durophages via scramble competition at feeding. Such competition also penalizes adults from bringing food to cubs, which are consequently breastfed. On the other hand, it is also hypothesized that natural selection has led to solitary scavengers having large canines to transport carcasses to cubs. Our results indicate that these functional aspects are also better reflected by lower teeth than the upper dentition, which leads to a mosaic evolution.
英文关键词	Hyaenidae Evolution Durophagy Ecomorphology Canines Carnassials Dentition Carnivores
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000599091700009
WOS关键词	CROCUTA-CROCUTA ; FEEDING ECOLOGY ; HYENA-BRUNNEA ; STRIPED HYENA ; BROWN HYENA ; TERRITORIAL BEHAVIOR ; PARAHYAENA-BRUNNEA ; NAMIB DESERT ; BITE FORCES ; PLEISTOCENE
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349101
作者单位	[Antonio Perez-Claros, Juan; Coca-Ortega, Carlos] Univ Malaga, Fac Ciencias, Dept Ecol & Geol, Malaga, Spain
推荐引用方式 GB/T 7714	Antonio Perez-Claros, Juan,Coca-Ortega, Carlos. Canines and carnassials as indicators of sociality in durophagous hyaenids: analyzing the past to understand the present[J],2020,8.
APA	Antonio Perez-Claros, Juan,&Coca-Ortega, Carlos.(2020).Canines and carnassials as indicators of sociality in durophagous hyaenids: analyzing the past to understand the present.PEERJ,8.
MLA	Antonio Perez-Claros, Juan,et al."Canines and carnassials as indicators of sociality in durophagous hyaenids: analyzing the past to understand the present".PEERJ 8(2020).