Researchers at Graz University developed new model to explain the emergence of biological diversity

The southern tip of Lake Tanganyika is the home of red, blue and yellow cichlids that belong to the genus „Tropheus“. The yellow Tropheus have developed as a result of hybridisation between red and blue fish, as researchers at the University of Graz have demonstrated by population genetic analyses and re-breeding in the laboratory. But how has this new phenotype managed to prevail? Why did the yellow cichlids not just continue to mix with the blue and red ones? The researchers see the answer to this question in environmental fluctuations. They have now published their new „Shifting Barriers Model“ in the scientific journal „Ecology Letters“. (Mehr in: Pressemitteilungen – idw – Informationsdienst Wissenschaft)