Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Sympatric colour polymorphisms associated with nonrandom gene flow in cichlid fish of Lake Victoria
Molecular Ecology, Volume 19, No. 16, Year 2010
Notification
URL copied to clipboard!
Description
Colour polymorphisms have fascinated evolutionary ecologists for a long time. Yet, knowledge on the mechanisms that allow their persistence is restricted to a handful of well-studied cases. We studied two species of Lake Victoria cichlid fish, Neochromis omnicaeruleus and Neochromis greenwoodi, exhibiting very similar sex-linked colour polymorphisms. The ecology and behaviour of one of these species is well studied, with colour-based mating and aggression preferences. Here, we ask whether the selection potentially resulting from female and male mating preferences and aggression biases reduces gene flow between the colour morphs and permits differentiation in traits other than colour. Over the past 14 years, the frequencies of colour morphs have somewhat oscillated, but there is no evidence for directional change, suggesting the colour polymorphism is persistent on an ecological timescale. We find limited evidence of eco-morphological differentiation between sympatric ancestral (plain) and derived (blotched) colour morphs. We also find significantly nonrandom genotypic assignment and an excess of linkage disequilibrium in the plain morph, which together with previous information on mating preferences suggests nonrandom mating between colour morphs. This, together with negative frequency-dependent sexual selection, found in previous studies, may facilitate maintenance of these polymorphisms in sympatry. © 2010 Blackwell Publishing Ltd.
Authors & Co-Authors
Magalhaes, Isabel Santos
Switzerland, Bern
University of Bern
Switzerland, Dubendorf
Eawag - Swiss Federal Institute of Aquatic Science and Technology
United Kingdom, Hull
University of Hull
Mwaiko, Salome
Switzerland, Dubendorf
Eawag - Swiss Federal Institute of Aquatic Science and Technology
Tanzania, Dar es Salaam
Tanzania Fisheries Research Institute Tafiri
Seehausen, Ole
Switzerland, Bern
University of Bern
Switzerland, Dubendorf
Eawag - Swiss Federal Institute of Aquatic Science and Technology
Statistics
Citations: 14
Authors: 3
Affiliations: 4
Identifiers
Doi:
10.1111/j.1365-294X.2010.04751.x
ISSN:
09621083
e-ISSN:
1365294X
Research Areas
Genetics And Genomics
Sexual And Reproductive Health
Participants Gender
Male
Female