Evolution of the Pharyngeal Jaw Apparatus in Ray-Finned Fishes

射线鳍鱼咽颌装置的进化

• 批准号: 0076436
• 负责人: Peter Wainwright
• 金额: $ 20.92万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0076436&HistoricalAwards=false
• 关键词: Evolution; Pharyngeal; Jaw; Apparatus; Ray

The ecological and evolutionary success of bony fishes, the most speciose group of vertebrates, is associated with extensive diversity in feeding biology that is facilitated by versatile systems of prey capture and processing. This research will elucidate mechanisms of function in the pharyngeal jaw apparatus of ray-finned fishes, the primary device used in manipulating, chewing, and transporting prey during feeding. The pharyngeal jaw apparatus is a poorly understood, complex system of modified gill-arch muscles and bones that has underdone extensive modification during fish evolution. Using recordings of muscle activity and a new method for visualizing skeletal motion inside the skull, sonometric-ultrasound, this research will test models of pharyngeal jaw function in several major groups of fishes in order to establish the mechanisms of jaw action and its evolution within the largest group of living vertebrates. This research will address basic questions about how the muscle-skeleton linkage system of the pharyngeal jaw apparatus functions, and how it has been modified during evolution to produce novel function and diversity in feeding biology. The complexity and diversity of this system will provide the raw material for exposing general principles of neuromuscular evolution.

硬骨鱼是脊椎动物中最特殊的类群，其生态和进化的成功与摄食生物学的广泛多样性有关，而多功能的猎物捕获和处理系统促进了这种多样性。 这项研究将阐明射线鳍鱼咽颌装置的功能机制，这是在进食过程中操纵、咀嚼和运输猎物的主要装置。 咽颌装置是一个我们知之甚少的复杂系统，由改良的鳃弓肌肉和骨骼组成，在鱼类进化过程中经历了广泛的改变。 这项研究将使用肌肉活动记录和一种可视化头骨内骨骼运动的新方法（超声超声）来测试几个主要鱼类群体的咽颌功能模型，以建立最大的现存脊椎动物群体的颌运动机制及其进化。 这项研究将解决有关咽颌装置的肌肉骨骼连接系统如何发挥作用，以及它在进化过程中如何被修改以在摄食生物学中产生新功能和多样性的基本问题。 该系统的复杂性和多样性将为揭示神经肌肉进化的一般原理提供原材料。