Molecular Phylogeny and Evolution of Labroid Fishes

实验室鱼类的分子系统发育和进化

• 批准号: 9806905
• 负责人: Stephen Karl
• 金额: $ 18万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9806905&HistoricalAwards=false
• 关键词: Molecular; Phylogeny; Evolution; Labroid; Fishes

9806905 KARL The largest and most diverse order of vertebrates is the "ruling perches", or perciform fishes. Fishes of the perciform suborder Labroidei comprise about 15% of all living fish and include the eastern Pacific surfperches, reef dwelling damselfishes, parrotfishes, wrasses, and the well-known cichlids. Previously, this wide array of species has been placed together in the Labroidei because these fish have modified structures in the throat region (a "modified pharyngeal apparatus") used to crush or otherwise prepare food items (prey) for digestion. The sheer diversity of this assemblage has hindered the construction of a classification that accurately reflects the history (phylogeny) of these fish, so it is unclear whether the pharyngeal apparatus characters signal the presence of one or many lineages. In this research, Stephen Karl will use DNA sequence data from three separate genes to reconstruct the phylogenetic relationships of labroid fishes, beginning the process of putting the classification of these fishes on a sound basis, and determining whether morphological features such as those associated with the pharyngeal apparatus appeared in one exceptionally diverse lineage of fishes or, rather, has appeared separately in several different, and hence only superficially similar, groups. The work should provide a firm foundation for ongoing and future comparative studies of the physiology and behavior of these numerous, and frequently economically important, fishes.

9806905卡尔脊椎动物中体型最大、种类最多的是“主栖鱼”，或称波斯形鱼。Perciform亚目Labroidei的鱼类约占所有活鱼的15%，包括东太平洋的冲浪鱼、珊瑚礁栖息的豆娘鱼、鹦鹉鱼、乌鱼和众所周知的慈鱼。以前，这种种类繁多的鱼被放在拉布罗迪亚族，因为这些鱼在喉部有改良的结构(“改良的咽喉器”)，用来碾碎或以其他方式准备食物(猎物)以供消化。这种组合的绝对多样性阻碍了准确反映这些鱼类的历史(系统发育)的分类的构建，因此尚不清楚咽部器官特征是否表明存在一个或多个谱系。在这项研究中，Stephen Karl将使用来自三个不同基因的DNA序列数据来重建Labroid鱼类的系统发育关系，开始将这些鱼类的分类建立在可靠的基础上，并确定形态特征(如与咽器相关的特征)是出现在一个异常不同的鱼类谱系中，还是单独出现在几个不同的、因此只是表面上相似的群体中。这项工作应该为正在进行的和未来对这些数量众多、往往具有重要经济意义的鱼类的生理和行为进行比较研究提供坚实的基础。