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.
点击下载:
PDF (488KB)
返 回