Divergent Selection on Opsins Drives Speciation in Lake Victoria Cichlids
Author Information
Author(s): Terai Yohey, Seehausen Ole, Sasaki Takeshi, Takahashi Kazuhiko, Mizoiri Shinji, Sugawara Tohru, Sato Tetsu, Watanabe Masakatsu, Konijnendijk Nellie, Mrosso Hillary D. J, Tachida Hidenori, Imai Hiroo, Shichida Yoshinori, Okada Norihiro
Primary Institution: Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama, Japan
Hypothesis
Divergent natural selection on opsin genes affects ecological adaptation and mate choice in cichlid fish.
Conclusion
The study demonstrates that strong divergent selection on opsin genes in cichlids leads to ecological adaptation and potential speciation.
Supporting Evidence
- Divergent selection on opsin genes was observed in cichlid populations across different water transparencies.
- The study found a strong correlation between LWS allele frequencies and male nuptial coloration.
- Cichlid species adapted to turbid waters had different opsin alleles compared to those in clear waters.
- The research supports the theory of ecological speciation through natural selection on visual traits.
Takeaway
Cichlid fish in Lake Victoria have evolved different eye genes to help them see better in their specific water environments, which also affects their colors and mating.
Methodology
The study involved sequencing the LWS gene in multiple cichlid populations and analyzing the relationship between allele frequencies and environmental factors.
Participant Demographics
Cichlid fish from four different species in Lake Victoria.
Statistical Information
P-Value
0.0008
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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