Direct mate choice maintains diversity among sympatric cichlids in Lake Victoria

Seehausen, Ole; Witte, F.; Alphen, J. J. M.; Bouton, N. (1998). Direct mate choice maintains diversity among sympatric cichlids in Lake Victoria. Journal of fish biology, 53(sa), pp. 37-55. Blackwell 10.1111/j.1095-8649.1998.tb01016.x

Full text not available from this repository. (Request a copy)

Mate choice may play an important role in animal speciation. The haplochromine cichlids of Lake Victoria are suitable to test this hypothesis. Diversity in ecology, coloration and anatomy evolved in these fish faster than postzygotic barriers to gene flow, and little is known about how this diversity is maintained. It was tested whether recognizable forms are selection-maintained morphs or reproductively isolated species by investigating in the field reproductive timing, location of spawning sites, and mate choice behaviour. There was a large interspecific overlap in timing of breeding and location of spawning sites, which was largest in members of the same genus. Behavioural mate choice of such closely related taxa was highly assortative, such that it is likely that they are sexually isolated species and that direct mate choice is the major force that directs gene flow and maintains form diversity. The results differ from what is known about recent radiations of other lacustrine fish groups where speciation seems to be driven by diverging microhabitat preferences or diverging timing of reproduction, but are in agreement with predictions from models of speciation by diverging mate preferences.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology

UniBE Contributor:

Seehausen, Ole

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0022-1112

Publisher:

Blackwell

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

09 Sep 2015 13:58

Last Modified:

09 Sep 2015 13:58

Publisher DOI:

10.1111/j.1095-8649.1998.tb01016.x

URI:

https://boris.unibe.ch/id/eprint/71537

Actions (login required)

Edit item Edit item
Provide Feedback