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I ‐ The ecological and evolutionary significance of morphological diversity

 

作者: LeopoldA.J. Nagelkerke,   FerdinandA. Sibbing,  

 

期刊: Italian Journal of Zoology  (Taylor Available online 1998)
卷期: Volume 65, issue sup1  

页码: 3-7

 

ISSN:1125-0003

 

年代: 1998

 

DOI:10.1080/11250009809386788

 

出版商: Taylor & Francis Group

 

关键词: Ethiopia;Lake Tana;‘Barbus’ species flock;Ecology;Evolution;Feeding;Ecomorphology

 

数据来源: Taylor

 

摘要:

The Lake Tana (northern Ethiopia) ichthyofauna is dominated by ‘large’ barbs (Barbusspp., Cyprinidae). Recently, fourteenBar‐busmorphs have been described. This paper provides evidence that these morphs are indeed biological species. To investigate the hypothesis that disruptive selection on feeding‐related morphological characters was the evolutionary driving force of speci‐ation, an ecomorphological analysis, investigating the quantitative relationships between morphology and feeding abilities on a number of aquatic food types was investigated. The analysis accurately predicted the potential trophic niches of the Lake Tana barbs and supported the disruptive selection hypothesis. Finally, a hypothetical evolutionary scenario is presented in which disruptive selection led to initial morphological differentiation, and spatial and temporal spawning segregation stabilized the genetic differences among the morphs, resulting in speciation.

 

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