蟾蜍摄食力学的xrom分析:舌、舌骨和胸带的相互作用

IF 2.2 4区 生物学 Q2 BIOLOGY
R. Keeffe, R. Blob, D. Blackburn, C. Mayerl
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引用次数: 1

摘要

摘要在许多陆生脊椎动物的进食过程中,舌头与舌骨和胸带协同作用。在青蛙身上,这三个元素通过肌肉组织相互连接。虽然无舌的进食机制已经得到了很好的研究,但对于舌头的运动如何与骨骼的运动相关,或者口腔闭合后颊部结构如何运动,却知之甚少。虽然胸带和舌骨等特征在青蛙身上看不到,但它们的运动可以在X射线视频中追踪到。我们使用XROMM(运动形态学的X射线重建)技术来跟踪甘蔗蟾蜍(Rhinella marina)在进食周期中舌头、舌骨器、胸带、头骨和下巴的三维运动。我们展示了在舌头伸出和猎物捕获过程中,以及在猎物运输、吞咽和恢复过程中,这些元素的运动是如何整合的。我们的研究结果表明,舌骨对猎物的操作和吞咽都很重要。在吞咽过程中,舌头一直延伸到头骨后部,通常比伸出到达猎物时延伸得更多。喂食运动学在个体之间是相似的,不成功的击打的运动学通常与成功的击打相似。我们的数据还为胸带在进食事件中的潜在作用提供了一个新的视角,胸带是一种具有主要运动功能的元素。这项工作提出了关于青蛙进食进化的新问题,以及在无尾蛙身上观察到的胸部和颊部解剖结构的多样性如何影响进食运动学。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
XROMM Analysis of Feeding Mechanics in Toads: Interactions of the Tongue, Hyoid, and Pectoral Girdle
Synopsis During feeding in many terrestrial vertebrates, the tongue acts in concert with the hyoid and pectoral girdle. In frogs, these three elements are interconnected by musculature. While the feeding mechanics of the anuran tongue are well-studied, little is known of how the motions of the tongue relate to the movements of the skeleton or how buccal structures move following closure of the mouth. Although features such as the pectoral girdle and hyoid are not externally visible in frogs, their motions can be tracked in X-ray video. We used XROMM (X-ray Reconstruction of Moving Morphology) techniques to track the 3D movements of the tongue, hyoid apparatus, pectoral girdle, skull, and jaw during the feeding cycle of the cane toad, Rhinella marina. We show how the movements of these elements are integrated during tongue protrusion and prey capture, as well as during prey transport, swallowing, and recovery. Our findings suggest that the hyoid apparatus is important both for prey manipulation and swallowing. The tongue consistently stretches posterior to the skull during swallowing, often more than it stretches during protrusion to reach the prey. Feeding kinematics are similar between individuals, and the kinematics of unsuccessful strikes generally resemble those of successful strikes. Our data also provide a new perspective on the potential role of the pectoral girdle, an element with a predominant locomotor function, during feeding events. This work raises new questions about the evolution of feeding in frogs, as well as how the diversity of pectoral and buccal anatomy observed across anurans may influence feeding kinematics.
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来源期刊
CiteScore
3.70
自引率
6.70%
发文量
48
审稿时长
20 weeks
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