Maintenance of species boundaries despite rampant hybridization between three species of reef fishes (Hexagrammidae): implications for the role of selection
نویسندگان
چکیده
1 Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95060, USA 2 Usujiri Fisheries Laboratory, Field Science Center for Northern Biosphere, Hokkaido University, Minamikayabe, Hokkaido 041-1613, Japan 3 Division Aquatic Biology and Ecology, Center for Marine Environmental Studies, Ehime University, Matsuyama 790-8577 Ehime, Japan 4 Laboratory of Ichthyology, Institute of Marine Biology, FEB RAS, Pal ′ chevskiy Street 17, Vladivostok 690041, Russia
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Female mating preference functions predict sexual selection against hybrids between sibling species of cichlid fish.
The evolutionary outcome of interspecific hybridization, i.e. collapse of species into a hybrid swarm, persistence or even divergence with reinforcement, depends on the balance between gene flow and selection against hybrids. If female mating preferences are open-ended but sign-inversed between species, they can theoretically be a source of such selection. Cichlid fish in African lakes have sus...
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