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A pharyngeal jaw evolutionary innovation facilitated extinction in Lake Victoria cichlids

Home Forums Ichthyology A pharyngeal jaw evolutionary innovation facilitated extinction in Lake Victoria cichlids

This topic contains 0 replies, has 1 voice, and was last updated by  Matt 2 years ago.

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    nuchal man
    Participant

    Some shameless self promotion, but this may be of interest to those who are interested in cichlids, morphology, or invasive species.

    A pharyngeal jaw evolutionary innovation facilitated extinction in Lake Victoria cichlids

    Matthew D. McGee, Samuel R. Borstein, Russell Y. Neches, Heinz H. Buescher, Ole Seehausen, Peter C. Wainwright

    ABSTRACT:

    Evolutionary innovations, traits that give species access to previously unoccupied niches, may promote speciation and adaptive radiation. Here, we show that such innovations can also result in competitive inferiority and extinction. We present evidence that the modified pharyngeal jaws of cichlid fishes and several marine fish lineages, a classic example of evolutionary innovation, are not universally beneficial. A large-scale analysis of dietary evolution across marine fish lineages reveals that the innovation compromises access to energy-rich predator niches. We show that this competitive inferiority shaped the adaptive radiation of cichlids in Lake Tanganyika and played a pivotal and previously unrecognized role in the mass extinction of cichlid fishes in Lake Victoria after Nile perch invasion.

    http://www.sciencemag.org/content/350/6264/1077

    #355308

    Matt
    Keymaster

    Cheers Sam. 🙂

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