Abstract:Rapid ecological speciation along depth gradients has taken place independently and repeatedly in freshwater fishes. While the extent of genomic divergence between ecomorphs is often well understood, the molecular mechanisms facilitating such rapid diversification are typically unclear. In Lake Masoko, an East African crater lake, the cichlid Astatotilapia calliptera has diverged into shallow littoral and deep benthic ecomorphs with strikingly different jaw structures within the last 1,000 years. Using genome-… Show more
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